By Popular Request 2.0/By Popular Request 2.0 (Arsenal Computer).ISO/amiga_1/ami_beg.txt

Text File | 1995-04-21 | 110KB | 2,150 lines

                         A Beginner's Guide to the
                          AMIGA Personal Computer

                          Written By Shane Monroe
        (c) 1994 By Dark Unicorn Productions.  All Rights Reserved.
                             Table of Contents

I.   Introduction and Terminology

     A. Introduction and Welcome

     B. Terminology

          Basic System Terms - WorkBench

          Devices, Memory, and Disks

II.  Amiga Internals

III. Basic Amiga Capabilities

IV.  Devices, Libraries, 'C' Directory, and Fonts

V.   Using the WorkBench

VI.  Understanding the Shell

VII. "Let's Do It" Tutorials

     A. Formatting and Preparing Disks

     B. Configuring Your Workbench and System

     C. Using PAL and NTSC; How to switch your system!

     D. File Manipulation Using DirWorks

     E. Virus Prevention and Information; Protect yourself

     F. Installing programs to Hard Drive without an Installer




















I. Introduction and Terminology

     A. Introduction and Welcome

          Congratulations!  You own the most powerful home
     computer the world has yet to see.  As with all things, with
     great power comes great responsibility.  This guide will
     assist you in learning your way around this incredible
     computer.  If you have been frightened about sitting down
     and playing with your Amiga, now is the time to do it.  We
     will take you by the hand and lead you down the path to
     becoming an Amiga guru.  This guide was intended for
     beginners and as such will probably bore those of you who
     have had an Amiga for a few years.  If you are very familiar
     with some aspects of the Amiga, feel free to skip these
     parts of the guide.  Learn at your own pace and don't get in
     a hurry.  You will be knowledgeable soon enough!  Happy
     computing!

     B. Terminology

     As with any profession, hobby, or pastime, personal
computing has its own 'jargon' or 'lingo'; a language you must
learn if you are to become an accepted part of this world.  This
section will teach you some of the specific terms regarding the
Amiga computer.  Many of these terms will be explained in more
detail later on, so if they sound confusing, hopefully they won't
when you are finished with this guide.

                      BASIC SYSTEM TERMS - WORKBENCH

     ICON - A small picture displayed on the Workbench that
represents a file.  Usually double clicking it will cause it to
be executed.  There are several types representing several kinds
of programs.  They are DISK, TOOL, PROJECT, TRASHCAN, and DRAWER.

     TITLE BAR - The dark bar on the top of the Workbench or on
top of an opened window.  Usually this contains the title of the
window (drawer) and other pertinent information like free space
left on the disk, etc.

     GADGET - This button-like object usually appears as a box
with a circular arrow on the left hand part of the box.  Clicking
this box usually changes its contents to something else; usually
an option.  Repeated clicking will 'toggle' through all the
possible selections.  Any interactive 'button' or screen area is
often called a GADGET such as a SLIDER or SIZER.

     REQUESTER - Almost every modern piece of Amiga software uses
a REQUESTER of some sort.  A requester usually does just that;
requests something then asks you to click the OK gadget when
ready.  There is also a FILE REQUESTOR which is used to input a
filename.  With this requester, you can 'browse' through all your
drives and devices and simply click the file to select.

     TRASHCAN - This icon is a deposit for unwanted files.  It is
really just a special directory used to hold these files.  When
you 'throw away' files here, they are moved to this directory and
kept until you physically DELETE them or select EMPTY TRASH from
the WorkBench pull downs.  If you really want to get rid of a
file simply DELETE it instead of using the TRASHCAN since the
TRASHCAN will not free up any space by its use.

     CLICK - Pressing a mouse button.  LEFT CLICK means the left
mouse button (usually used to select or highlight) and RIGHT
CLICK means the right mouse button (usually used to activate the
pull down menus on the Workbench or inside a program.  Many items
like the Workbench require a DOUBLE CLICK to activate something.
When you see DOUBLE CLICK, it means click the left mouse button
twice quickly on your selection.

     DRAG - This is used to move icons around the screen, copy
files, and deposit items in the TRASHCAN.  To effect this, simply
click your left mouse button and hold it down on the icon.  The
icon will then follow your pointer until you let it go.  We'll
examine this procedure more later.

     TOGGLE - Like a light switch, many gadgets have a SELECTED
or DESELECTED text.  Some menu options can be turned off and on
such as the BACKDROP on the Workbench pull down menus.  These are
sometimes denoted by a check mark or by highlighting the option
in another color.  In any event, this is called TOGGLING the
command/option; changing it to its other value.

     SLIDER - Sliders are used on the sides and bottoms of
windows to show when there is more information available.  They
also allow you to scroll around the window to see this
information.  You may either DRAG the small filled box inside the
slider to show the information or click in the slider area where
the filled box ISN'T and the box will travel in that direction.
To see this in effect, open you Workbench Icon and use the SIZER
in the lower right hand corner of the window to SHRINK the window
to a smaller size.  When you are finished, the sliders will
indicate that there are more icons to see.

     SIZER - This allows you to size the window.  This gadget is
located at the bottom right of almost every window and can be
DRAGGED to the proper size.

     CLOSE WINDOW GADGET - The gadget located in the top left
corner looks like a little box inside a box.  This will close the
current window.  If you are in a SHELL, you may press CTRL-\ to
close the window.

     WINDOW TO BACK GADGET - Located in the top right corner of a
window, it puts the current window BEHIND all the other windows
so you may have access to them.  It looks like two box
overlapping each other.  You may also use LEFT AMIGA-M to push a
window back.

     SHRINK WINDOW GADGET - This gadget is located to the
immediate left of the WINDOW TO BACK GADGET.  It will shrink or
expand the window to its smallest size or original size
respectively.  It is a toggling gadget.

     GRAPHICS MEMORY - Displayed on the title bar of the
Workbench Screen (AmigaDOS 2.0+) shows the current amount of CHIP
RAM you have remaining.  You will notice that every time you open
a window it takes a little bit of CHIP RAM away.  When the window
is closed, it gives it back.  More on CHIP RAM later.

     GUI - (letters are spoken aloud, not as 'gooey') Graphic
User Interface.  The technical term for an operating system that
uses a mouse, windows, icons, and gadgets.

     WORKBENCH - The program that manages your files and allows
your interaction with them.  Considered a GUI.  This is the
native Amiga operating mode but is NOT required for the Amiga to
function.  It is a small program located in your 'C' directory on
your boot disk.

     PULL DOWN MENUS - Commands you can select by holding down
your right mouse button and moving the pointer to the title bar.
While holding the mouse button down you may browse through the
choices.  If a command is highlighted with your pointer (denoted
usually in inverse text), you may select it by simply releasing
your button.  Some items on the menus may be 'ghosted' or very
light in color/dotted.  These items will not be selectable.
These are usually 'activated' when another condition exists, such
as an icon being selected.  To see an example of this, use you
Workbench pull down menus and look under ICONS.  Most of these
commands will be ghosted.  To see them unghosted, select an icon
on the Workbench by clicking it once then go back and look at the
pull down menu again.  Most of them will be selectable now.


     That concludes the basic Workbench terminology.  Now let's
move on to the more complicated side of the operating system.

                        DEVICES, MEMORY, AND DISKS

     DEVICE - Anything you can send and/or receive information
to/from such as disk drives, modems, printers, CD-ROM drives,
digitizers, etc.  Even the screen is considered a DEVICE, as is
the keyboard.  We will look at the most used devices later.

     MEMORY - An area where the computer stores information.
Some of it is available to you to use, some of it is for the
computer only.  Every computer (and nearly every modern day
electronic device such as wrist watches and microwave ovens) has
at least SOME memory.  There are MANY different types on some
systems, the Amiga is one of them.

     ROM - Read Only Memory.  This is memory that can only be
read from but not written to.  The actual computer operating
system (called Kickstart since it is actually required to 'start'
your system) is contained on a replaceable chip inside the
computer.  This ROM contains permanent information the system
needs to run.

     RAM - Random Access Memory.  Memory that you can load
programs, graphics, and sound into for the computer to use.  It
is volatile which means that when the computer is shut off (or
rebooted using CTRL-LEFT AMIGA-RIGHT AMIGA) this memory is reset
and (most of the time) lost.  There are some ways around that
which we will look at later when we talk about viruses.  There
are several types of RAM using in the Amiga, each one with a
different purpose.

     RAM (Fast) - Fast RAM is used to store programs used by the
central processor (the heart of the computer: a Motorola 68000
series).  In most Amigas this is often 16-bit memory (more on
that later) since the 68000 is a 16-bit processor.  Sega uses the
same chip in their Genesis game console and their Sega CD.  If
your machine is equipped with an accelerator (68020, 68030, or
68040 CPU) then you have a 32-bit processor which runs
considerably faster that the 68000.  This CPU requires
(obviously) 32-bit Fast RAM to run at its optimum performance.
If you only have 16-bit Fast RAM and a 32-bit processor, you
machine may not seem as fast as it should, since the processor
cannot operate at the speeds you paid for.  16-bit Fast RAM is
occasionally called SLOW RAM.  You can put up to eight megs on a
16-bit processor (with some exceptions) and pretty much unlimited
(based on the weight of your pocketbook) on a 32-bit processor.
This RAM can usually be added by sticking in a board or plugging
in a box on the computer.  In any event, the custom chips (more
on that later) cannot use any form of FAST RAM for storage.

     RAM (Chip) - Since the Amiga is the only true multitasking
machine, it has several custom processors (or called the CUSTOM
CHIPSET) to handle almost every function of the computer, leaving
the CPU free to do the basic number crunching and program
execution.  These custom processors require their own memory to
store their own programs in.  The memory they are designed to use
is called (appropriately enough) Chip RAM.  In older Amigas it
was set at 512K (one half a megabyte).  Then, a modification came
out to let you have one megabyte of Chip RAM.  The latest Amigas
have two megs of Chip RAM.  Since all the graphics and sound are
stored here, it is easy to see why 'the more the merrier' is
quite true when it comes to Chip RAM.  Chip RAM *CAN* be used by
the CPU if no Fast RAM is available.  But, this is not desired
since Chip RAM is about 20% slower than the 16-bit Fast RAM.
Chip RAM is very costly and difficult to add.  It also has a
little flaw in it called FRAGMENTATION.  More on that later on.

     DISK - A disk device (or drive) comes in many forms with
lots of different names.  All drives require a CONTROLLER to talk
between them and the computer.  The disk drive that is built in
to all Amigas is a 3.5" Floppy disk drive.  Note: Although the
3.5" disk casing is hard plastic, the actual media inside the
casing is floppy so it is still considered a floppy disk.  The
computer has a built in floppy drive controller that will allow
up to four floppy drives to be connected and accessed at one
time.  Hard Disk Drives actually use rigid plastic disks to store
data on.  These are hermetically sealed inside the case and you
will probably never see what a platter (the disk itself) actually
looks like.  They hold a great deal more than their floppy
counterparts and also require a controller to operate.  Most
Amigas do not have this controller built in so it must be
purchased with the drive to use.  A CD-ROM drive works the same
way, basically.  It also requires a controller but stores its
information in little pits on the disc.  These pits are of
different depths which represent numbers that the computer can
actually change into a program to run.  All controlled devices
need a software program 'patch' or device file to allow them to
talk from the controller to the computer.  These are located in
your DEVS directory on your Workbench Disk or hard drive
partition.  Floppy drives are denoted as DF0 - DF3 and hard
drives are usually denoted as DH0 - DH?.  The Amiga internal disk
drives are all double density (with the exception of the A4000)
and hold 880K of data when formatted.  There are some utilities
out there that will allow you to increase this number to 936K or
so.

     RAM DISK - This is a special device.  It allocates your
memory as a 'mini disk drive' to allow temporary storage of files
and data.  On your Workbench, you should see an icon that says
RAM DISK or RAM.  This is just like a disk drive and you can copy
to, delete from, install programs to, and manipulate it just like
the disk drive counterparts.  Its capacity is limited to your
total available memory (displayed on the title bar of your
Workbench disk).  It does not need to be 'formatted' to be used.
It is ready as soon as you see its icon.  WARNING!  It uses RAM
to hold what is in it so if you reset your computer, crash it,
power failure occurs, etc. anything there will be LOST!  There is
a device you can create called a RAD which is like a RAM DISK but
it will survive anything but turning the computer off (or power
loss).  You can crash it, reset it, etc. and it will still be
there when your Workbench loads.  More on the RAD later.

     PRT - Printer device.  You can specify which device to send
a file to in most Amiga programs.  For instance, if you are
working on a database and you want to save it to the internal
floppy drive, you might enter a filename called DF0:DATABASE.
With the Amiga, you can send it right to the printer!  Simply
enter PRT:DATABASE and it will send the file to your printer!
Since you sent your printer type in the PREFs (more later), all
programs can make use of the special features of that printer.

     SER - Serial device. This is the device that lets you talk
to the serial port (used mostly by modems and printers).  Like
the PRT device you just need to use SER as the device name.

     PAR - Parallel device.  Talks to the parallel port.  This is
the most common port used by printers.  Unless you are talking to
another Amiga via a Parnet cable, the PRT would be better to use
if you want to send something to the printer.

     CON - Console device.  The computer itself! If you send a
file to the console device, it will display on your screen using
your CON: device parameters.


     If a lot of this doesn't make sense right now; be patient.
Rome wasn't built in a day, nor was your Amiga.  Give yourself
some time to learn.

II. Amiga Internals

     We have touched lightly on the internals of the Amiga
computer in the last chapter.  Now we are going to get a little
deeper and a little more technical on what these things do.
Let's take a look at the BASIC schematic of the Amiga showing the
major chips.  This represents the NON-AGA Amigas (A500, A1000,
A2000, A600)


                         VIDEO    INPUT/OUTPUT  SOUND
+--------------------------|-----------|---------|-------------+
|                          |           |         |             |
|  +----------+      +----------+  +------+  +-------+         |
|  |   CPU    |----  |  DENISE  |  | GARY |  | PAULA |         |
|  +----------+   |  +----------+  +------+  +-------+         |
|      |    |     |       |            |         |             |
|      |    |     |       |----------------------|             |
|      |    |     |                 |                          |
|      |    |     |             +-------+                      |
|    +---+  |     |             | AGNUS |                      |
|    | K |  |     |             +-------+                      |
|    | I |  |     |                 |                          |
|    | C |  |     |-------------|   |                          |
|    | K |  |  +----------+   +----------+                     |
|    | S |  |  | FAST RAM |   | CHIP RAM |                     |
|    | T |  |  +----------+   +----------+                     |
|    | A |  |                                                  |
|    | R |  |                                                  |
|    | T |  |  +------------------------------+                |
|    |   |  ---| 32-BIT FAST RAM IF AVAILABLE |                |
|    | R |     +------------------------------+                |
|    | O |                                                     |
|    | M |                                                     |
|    +---+                                                     |
|             * SCHEMATIC DRAWN FOR CLARITY NOT FOR ACCURACY *  |
+--------------------------------------------------------------+

     As you can see, there are some serious chips in this
machine, capable of doing things that other platforms STILL
cannot do.  Let look at these in a little more depth.

     CPU - As mentioned before, it is the 68000 family from
Motorola.  In non-accelerated Amigas, the CPU runs at a speed of
7.16 MHZ.  Now that doesn't sound like a lot, I know.  When you
read about IBM PCs running at 66 MHZ, it sounds like you may be
living in the Dark Ages with your Amiga.  Not so.  If you look at
the schematic closely, very few functions are done by this 'slow'
CPU.  The video, audio, and input/output are all handled
independently of the CPU. On these 66 MHZ Pcs, every function has
to tear a chunk out of the CPU processing time.  That is why a
'slow' Amiga can often outrun and outperform a PC of double or
triple the MHZ (also called CLOCK SPEED).  Imagine having a 50
MHZ Amiga!  Wow!  The CPU uses all three RAM banks for memory but
the memory is used in this order: 32-bit Fast RAM, Fast RAM, and
finally Chip RAM.  That way, it always uses the fastest first and
the most precious last.  The CPU may also have a MATH COPROCESSOR
which takes care of all the heavy duty math functions, leaving
the CPU even more free of burden.  When you get right down to it,
the CPU does very little.  On an information note, many of you
are probably thinking "Well, if the CPU has nothing to do, how
come most flight simulators run so SLOW on my Amiga?"  Good
question.  Here is why.  Most of these games are 'ported' over
from the land of IBM Pcs where they have no custom chips.
Therefore, all the routines depend strictly on CPU speed to
operate.  The programmers don't recode the game to make use of
the graphics power of the Amiga and just rely on the CPU.  So
naturally a flight sim made to run good on a 33 MHZ PC isn't
going to run worth beans on a 7 MHZ Amiga.  Solution?  Get a
faster processor or get a flight sim that was written for the
Amiga ON the Amiga (like F/A-18 Interceptor) and see how well it
runs!

     KICKSTART ROM - This is the 'brain' of the system.  Without
this chip, you can't even get a screen up.  This holds all the
programs for making the system work; its internal functions.
Kickstart use to be on disk (just like IBM PC people do it with
COMMAND.COM and the IBMBIOS.SYS files) with the very first
Amigas.  Before you could even boot up Workbench you had to stick
a disk in with the Kickstart information on it.  The version of
Kickstart was 1.1 through about 1.3.  Then, they made the middle
Amigas with the Kickstart on a ROM chip as it is now.  They made
it fairly easy to change out (amen).  The 1.3.4 version was more
or less the final 'old' Kickstart ROM.  Then came the 2.0 ROMS
which were pretty flaky and more or less beta.  Some old A3000's
had this beta ROM.  It was soon fixed with 2.04 which is now
pretty much the standard.  With the addition of the PCMCIA slot
and high density floppy drives to the Amiga, another update was
needed so 2.05 was released.  2.05 is very unstable on old
machines and should not be used with older A500s.  The 2.05 is
primarily for the A600 which has the PCMCIA slot.

     DENISE - This is the graphic heart of the Amiga.  It has
some fantastic features not found on any other graphic processor
anywhere.  The most incredible feature of this chip is that it is
already synchronized to everyday video signals like your TV and
VCR!  Video that comes out of the computer my be sent to your VCR
and recorded with no specialized equipment.  To do this on a PC
would cost several hundred dollars EXTRA.  Other features include
a blitter mode and copper list.  The blitter, simply put, is the
ability to move portions of the screen around at unbelievable
speeds.  Great for animation.  The copper lets you alter any
individual line on the screen independent of the others.  This is
why you can open multiple screens with different resolutions at
the same time.  Of course, you can also exploit this for awesome
special effects for games and video production.  There are two
incarnations of the DENISE chip.  The original DENISE and the
Super DENISE.  The Super DENISE does very little more than give
you and additional screen mode called Super Productivity Mode,
which is 1280x400 resolution but only 4 colors.  Really only good
for business/productivity software.

     GARY - This chip controls all the input/output of the
system.  Printers, disk drives, serial port, etc.  This chip
gives the computer the ability to REALLY multitask since you can
output to the printer, access your hard drive, and copy two
floppies at the same time WHILE YOU ARE DOWNLOADING WITH YOUR
MODEM.  Try that with ANY PC!

     PAULA - This is the sound driver for the Amiga.  As it is,
you have 2 channel, 4 voice, hi-fi stereo sound with any Amiga
computer.  It is the standard.  Some very clever programmers have
hacked six, even 16 voices out of this chip.  The sound coming
out is with standard RCA type plugs which can attach to any
stereo for unbelievable sound quality.  Even with the new
technology, PC computers don't have the fidelity that comes out
of the Amiga.

     AGNUS - This is the memory manager for the CHIPSET.  To
direct each chip to the right area of memory, the Agnus sits
between the chips and Chip RAM.  There are three incarnations of
this chip.  The original Agnus, the Fat Agnus, and the Fatter
Agnus (also called Super Agnus by some).  These chips decide how
much Chip RAM you system CAN HAVE not necessarily actually have.
The original Agnus would only address 512K maximum.  The Fat
version  accesses one meg, and the Super can address two megs.
The Amiga 3000, 1200, 4000, and 600 have the Super Agnus chip in
it.  Only the first three actually have the full two megs of Chip
RAM in it.  The 600 can be expanded to make use of the extra Chip
RAM.  The other Amigas require a special board called the
MegaChip 2000 to get two megs of Chip RAM.  The 2000 has one meg
of Chip RAM standard (Fat Agnus) and some newer 500s have the Fat
Agnus also, but cannot access the memory without a special
modification done to the motherboard.  The most important part of
the Fat Agnus and Super Agnus is the ability to switch to PAL
video mode.  This alone requires some explanation.

     Europe uses a different type of power than we do here.  They
use 50 hz power instead of 60 hz like us.  That means that their
power cycle is slower.  Thus, it takes their computer a little
bit longer to update the screen display; it does it every 50th of
a second versus every 60th of a second with ours.  In other words
they can draw more on the screen before it has to start over
again.  In layman's terms, they can display 256 lines on the
screen versus 200 lines on ours.  This can truly unsync the
graphics and sound on games and in some cases cause them not to
work at all if timing is critical to the program.  By using a
special program, we can change our screen displays into PAL (ours
is called NTSC) mode so that we can use the wealth of European
Software that is available to us.  This reason alone is good
enough to warrant upgrading this chip if you have the old
original one.

     FAST RAM - We discussed this is detail above so we will only
touch on it here.  Again, this is the memory that is used by the
CPU to store programs and data and is NOT useable by the custom
CHIPSET.  It may be worth noting that when you add Fast RAM to
the system autoconfigures it and it is immediately available.  On
PC computers, you are required to run a memory manager program to
access the memory and even then it is difficult to arrange right.

     CHIP RAM - This is a topic which we discussed earlier, so I
won't recap all that information here.  Instead, let's talk about
the liabilities of Chip RAM.  Aside from having very little of it
to start off with (unless you own an AGA A1200 or A4000) and
having it costly & difficult to upgrade, there is another problem
called FRAGMENTATION.  This can get sticky, but try to follow me
on this one.  Chip RAM is allocated in 'chunks' by the custom
CHIPSET as it requires it.  The DENISE chip may grab a 200K chunk
to open up a screen.  Think of Chip RAM as a whole pie; a one
megabyte pie.  When a chip needs some memory, it asks Agnus to
allocate it a piece of pie.  Agnus checks the pie to see if a big
enough piece is available and then 'slices' a piece out and
'gives it' to the chip requesting it.  When the chip is done with
it, it gives it back in the same size it took it.  Agnus 'puts
the piece' back into the pie and it is available for the next
request.  Unfortunately, once the pie is 'sliced up' from all the
requests, all the is remaining are thousands of 'little slices'
of pie.  Now, a chip requests for a large chunk of Chip RAM.
Agnus checks each slice to see if it can cut a big enough piece
out of it to meet the demand.  After searching all the pieces, it
could not find a big enough piece, so it tells the system that
there is an OUT OF MEMORY error and denies the chip the memory,
even though the 'pie pan' is full of pie slices!  This is called
fragmentation and it is one of the leading 'cryptic' reasons why
your Amiga will give you an OUT OF MEMORY error when you
WorkBench shows you have plenty.  The worst part of the deal is
that the only way to defragment the memory is to reset the
machine or turn it off then back on.  There are a few programs
out there that claim to 'force' a refragmentation of memory, but
they are genuine hacks and not available commercially.  While
this problem sounds bad (and it is) and frequent (it isn't),
there are a few things you can do to help reduce the frequency.
If you are going to use a paint program, stick in one resolution
if possible.  Or if you know you will be needing to use multiple
resolutions, use them in order highest to lowest.  You may also
reset your machine from time to time.  The bottom line is, don't
consciously worry about Chip RAM unless you start having problems
with it.  Most of us run one meg Chip RAM machines and very
rarely have any problems with fragmentation.  This paragraph was
written to educate you on one of the idiosyncrasies of your
machine; not to scare or worry you.

     Of course, there are many more parts inside you computer
like CIA chips (your floppy drive and mouse/joystick controllers)
but most of them are beyond the scope of this guide.  If you want
to learn more about these parts, I would recommend contacting
ABACUS books and getting one of their advanced guides.

III. BASIC AMIGA CAPABILITIES

     Now that we see all this cool hardware and awesome operating
system, let's really talk about what you can do with it.  Most
people believe that the Amiga is a 'game machine' and not
suitable for 'professional' applications.  Au contraire monsieur,
the Amiga is capable for EVERY COMPUTER NEED you may have.  This
chapter will explain why and recommend some programs to meet
these needs.

     First, let's talk about graphics, where the Amiga really
excels.  While newer PCs have a better resolution with 256
colors, the Amiga more than makes up for it with its special
graphic modes and the Denise specialties we mentioned earlier.
Here is a breakdown of the Amiga display resolutions:

     Name           Size (in pixels)    Maximum Colors
 -------------------------------------------------------------
 Low Resolution       320x200               4096 (HAM)
 Low Res Interlaced   320x400               4096 (HAM)
 High Resolution      640x200               16
 High Res Interlaced  640x400               16
*Super Productivity   1240x200              4
*Super Prod Interlace 1240x400              4

     * Requires a Super Denise chip.

     Please note that this is for Amigas up to AGA.  The AGA
Amigas have much better resolutions and colors, but since the
majority of Amiga users reading this guide have these older
systems, we will stick with this.  To make things easier, let
define a couple more terms.  OCS is the old chipset.  This means
half meg Agnus and no Super Denise.  ECS (enhanced chip set) is a
one or two meg Agnus and a Super Denise.  The only computer that
comes with the ECS installed is the A600.  The AGA machines have
their own AGA chipset.  The ECS, of course, can be installed in
any lesser Amiga.

     The possible colors for a resolution depends on the mode you
are operating in.  In Low Res, you have 2, 4, 8, 16, and 32
colors plus access to 4096 color HAM (more on that later) as well
as a special mode called Extra Half Brite (EHB) which allows for
64 colors in a special way.  You may have 2, 4, 8, or 16 colors
for High Resolution screens.  Super Productivity Mode is used
only for business applications requiring a huge screen since it
only supports 4 colors.

     Extra Half Brite is a special mode that makes 64 colors out
of 32 colors.  Here is how it works.  The first 32 colors are
definable and the second set of 32 colors are derived from the
first 32 colors by dimming them to half as bright (thus the
name).  So now you have 64 colors out of 32.  When you change a
color, its 'half bright partner' is also changed.

     HAM is very interesting indeed.  It is also quite
complicated.  HAM stands for Hold And Modify and, as the name
might imply, is not very good for animation.  HAMs real power
comes out when displaying photographic quality still images, such
as people or a real life picture.  HAM gives you 4096 colors on
the screen versus the 256 colors of a PC.  Granted, the
resolution must be Low or Low Interlaced, but believe me color is
more important than resolution when it comes to displaying images
of this type.  HAM is nothing more than a clever hardware 'hack'
that wasn't even originally planned when the Amiga was designed.
The biggest liability of HAM mode is a 'glitch' called HAM
FRINGING.  This is what you see on some HAM pictures if you try
to modify them with a paint program.  It is a color bleed,
basically.  The process is very detailed but let's just say that
each pixel color is dependant on pixel's color to the left of it.
So, if you change a pixel's color, it can effect up to three
pixels to the right of it.  This causes the 'bleed' effect you
see.  HAM is very neat but very restrictive, which is why most
software does not use it, especially games which require a lot of
action and movement.  Most games use Low Res 32 or 64 colors for
their display.

     Using the Amiga for games is an excellent choice.  The
powerful graphic commands of the Denise (copper & blitter) give
this machine the edge for fast hard core arcade games like Mortal
Kombat.  The ease of adding memory to the Amiga make it a good
platform for in depth memory hungry simulation games too.  The
fact that every Amiga has a mouse and built-in inexpensive
joystick adapters also make it cheap for games.  The rich built-
in sound chip generates arcade quality stereo soundtracks and
sound effects as well as providing speech and digital sound
capability.  The fact that the video signal coming out of the
computer can be sent straight to a TV puts it in good competition
for console games like Sega and Nintendo.  Although the Amiga was
not originally designed for games, it certainly does a good job
of playing them.

     Productivity on the Amiga is also quite good, although in
different ways than the PC.  The PC has tons of productivity
titles not even available on the Amiga, but the Amiga does have a
few things that the PC doesn't and it can really swing the
pendulum towards the Amiga if these things are what you need.
The main advantages to productivity work on the Amiga is the true
pre-emptive multitasking operating system.  This operating system
(OS) is by far the best OS on the home computer platform.  PC
users have Windows and OS/2, but the power of the Amiga OS has to
be explained before you can really see the superiority of it.

     First, it requires very little memory to run.  Workbench
itself is only 14K!  The Amiga OS will run on an Amiga of only
256K!  Try running Windows or OS/2 on any PC with less than 16
megabytes of memory and see how you like it!  Since the OS is
pre-emptive, you may actually assign a priority to each task that
is running to insure that the processor gives it attention before
any other task.  For instance, if you were running a spreadsheet
that was doing major calculations, you may set the task at a
higher priority so that when you are writing a letter on your
word processor (at the same time, of course), the CPU will give
the spreadsheet the attention when it calls for it to do
calculations.  In this respect, if a task crashes, it can usually
be suspended and allow you to finish up the work you are doing
with other programs before you reboot to clear the crashed task.

     The OS also has a ton of other little gems for productivity
that set it aside from the other lesser OSs.  Overall, the
environment is incredibly simple and easy to learn as you will
see in the tutorials.  In WorkBench 2.1 and above you can do all
sorts of things like read and write to IBM formatted disks
(Double Density, of course) so you can take files to and from
work and use them on the PC you may have there.  Since the Amiga
has productivity programs that will share data with IBM
productivity, you can do a lot of work at home using the Amiga OS
and then take the data back to work.  Here is a quick list of
popular PC programs and the Amiga programs that will exchange
data with them.

IBM Program              Amiga Programs
-----------------------------------------------------------------
Word Perfect               Transwrite, WordsWorth, Word Perfect
Lotus 1-2-3                Professional Calc
dBase III, IV (.dbf)       Superbase Pro, SBase IV, dB Man

     Of course, standard text (ASCII) files are fully moveable
from platform to platform.

     Another gem is the ability to set default preferences for
major peripherals so you don't have to set them for individual
programs.  For instance, there is a PREFS editor for all version
of AmigaDOS.  From there, you can set the default printer type to
use.  Once it is set, all programs grab the printer driver from
that preference instead of making you specify one inside the
program.  You can read this as NO MORE PROGRAMS THAT DON'T
SUPPORT YOUR PRINTER!  Once the driver is set, you no longer need
to set it inside your programs.  If you have a strange printer
and a PC, you know the frustrations of getting an expensive piece
of software that relies heavily on the printer only to find out
that it doesn't support your printer.  Then you spend your whole
afternoon trying to find a driver that is CLOSE enough to get the
printer working.  Come to find out that half of the special
features you bought your printer for won't work with this other
driver.  Not a burden for us Amiga owners.

     You can customize your Workbench to look and act exactly the
way you want including colors, sound effects, backdrops, custom
animated icons, screen resolution, even redefine the shape of
your mouse pointer!  All this is SUPER easy to do, too.

     Now, how about video production?  If you have ever wanted a
hand in making movies, this computer will help you out.  Since
the video output is synchronized to normal video, you can make
scrolling credits for your home movies, animate your own cartoon,
or do wild special effects like morphing and 3D rendered
animation like in seaQuest DSV.  All done on your little 'game
computer'.  With an inexpensive hardware device you can 'scan'
your pictures onto the screen and modify them.  You can record
'mini-movies' and play them back.  Scan in your business logo and
alter it then print it back out to your laser printer.  Grab a
frame of your favorite TV show and put it as a backdrop on your
Workbench.  The sky is the limit and you already have most of
what you need to get there; an Amiga.  If you are seeking to
become a video professional, you will have no doubt heard about
the Video Toaster.  This all in one card for the Amiga (only, I
might add) will give you the power of a $100,000 television
studio right in your house.  seaQuest DSV and Babylon 5 are just
two major programs that utilize the Toaster for their special
effects.  The Video Toaster costs under $2000 and is a real
steal.  It requires an A2000, A3000, or A4000 to work.  With an
cheap device called a GENLOCK, you can overlay computer graphics
and live video like the weatherman and his map, or make your own
'Roger Rabbit' movie using your own Amiga generated cartoon
characters with YOU as the star.

     Personal software such as address books, calendar planners,
CD databases, organizers, and much more are abundant in the
Shareware realm of the Amiga.  You can get great software for $5
or $10.  Some of it you can get for FREE!  You may never have to
spend the cash on another high priced piece of software again!



IV.  Devices, Libraries, 'C' Directory, and Fonts

     Now that you have seen the power of the Amiga computer, it
is time to discover a little more about where it comes from and
allow you to broaden your knowledge about your system.  Anyone
can use a computer, but it takes something special to REALLY
understand what is happening inside.

     As an Amiga owner, chances are you know twice as much about
your system as most PC owners know about theirs.  That is because
the Amiga OS let's you get as deep as you want into the system
without FORCING you to.  You can operate an Amiga for years and
never once open a Shell (more later) or learn anything about what
I am about to share.  But the more you know, the more power of
your system you will get.  There are a MASSIVE number of things
you can do with your Amiga than what the Workbench will allow.
In order to use this power, you need some knowledge to keep the
power under control.

                                  DEVICES

     As we stated before, a DEVICE a piece of hardware such as a
modem, printer, or hard drive.  Each device has a controller of
some kind to allow it to talk to the computer.  In order for the
Amiga to talk to it, it requires a small program to tell it 'how'
to talk.  Think of this program as an 'interpreter'.  This
program is called a DEVICE DRIVER.  The drivers can be recognized
by the extension .DEVICE.  The printer driver is called
PRINTER.DEVICE, the serial port driver is called SERIAL.DEVICE,
etc.  Since these drivers are programs, they can be modified and
updated by programmers to take advantage of new technology
easier.  Most drivers that are used are included with Workbench.
Some special hardware such as CD-ROMs or video scanners, etc. may
require that you use their special driver.  Most of the time,
though, the software that comes with the hardware will have an
easy installation program that will do it all for you.  As a new
Power Amiga user, you need to know where these are.  All the
drivers are kept in a drawer called DEVS on your Workbench disk
or partition.  If you were to look in this directory, you would
see lots of drivers for lots of different devices.  For the most
part, you will not even notice this drawer nor its contents and
even more rarely will you ever have to interface with it.

                                 LIBRARIES

     This is where you can get yourself into trouble.  Not being
knowledgeable in this area can cost you a lot of time and
trouble.  But, in a few minutes, you will hot to trot on
libraries.

     A LIBRARY is a program file.  All your libraries are kept in
a drawer called LIBS on your Workbench disk or partition.  They
cannot be run, per se, but are more like a RESOURCE for other
programs to draw commonly used information out of.  This makes
programs smaller and more efficient.  Take this example.  You are
a worker for a construction site.  Now, you are building a house
here and aren't exactly sure what you are going to be required to
work on that particular job; it could depend on the weather, how
long a job before takes, etc.  You have to decide on something.
What tools are you going to bring from your truck out to the
actual site?  Carpenter tools?  Electrical tools?  Plumbing
tools?  You don't really know.  You could drag your whole toolbox
out there just in case, or you could just get what you needed out
of the truck when you required that particular type of tool.
Your truck is right there and that way you don't have a lot of
tools cluttering up the place.

     This is the way libraries work.  Let's say you write a
program that might be required by the user to load up a picture
and display it.  Chances are he won't, but he might.  Are you
going to include the routines inside your program to load the
picture?  Well, you could, but there is a library out there that
has the routines in it for you.  All you have to do is call for
it and it will do the job for you.  If you want to do heavy math
inside your program, you can call a different library to do it
for you so you don't have to include a 'calculator' inside your
program.  That is why so many Amiga programs are so small; they
use libraries to do most of the dirty work.  Libraries are
information common to lots of programs (math, graphics,
input/output, etc).

     So, why can these guys get you in trouble?  Well, almost
every big program out there has a couple of special libraries
that it requires to run.  Now once you've installed a lot of
programs on your hard drive, you may have a HUGE LIBS directory
(you should see mine) and some software uses the same special
libraries such as the popular ARP.LIBRARY which is a very nice
file requester routine.  While the program may work fine on your
hard drive, if you put it on a floppy and try to run it, it may
not find that library and crash.  Should you go on a LIBS drawer
deleting spree, you may find that a lot of your programs
(including Workbench) might now work any more.  Another problem
you might run into is when you install a new piece of software
that contains an UPDATED version of an existing library.  If the
old library is overwritten, the program that used it before may
not run anymore.  This happens with a lot of 1.3 vs. 2.0 programs
that use very different libraries with the same name.  Be very
careful about overwriting existing libraries with new ones.

     You will also need to be familiar with this directory if you
ever plan on trying to coax a non-hard drive installable program
onto your hard drive.  More about this later.

                               'C' DIRECTORY

     Ah, the nerve center of your OS.  If you are also a PC user,
this drawer is comparable to the DOS directory in MS-DOS.  Simply
put, most of your Shell commands are here.  Commands like copy,
delete, dir, makedir, etc. are all found right here.  Again, this
is a directory that a regular user may never look at, but as a
Power user, you will intimately learn about.

     Next to your LIBS directory, this will probably be your
biggest drawer in terms of number of files.  Mine has over 300
files (commands) in it.  After you computer on your Amiga for a
few years you will build up a great collection of these little
'utilities'.  Things like text viewers, picture viewers, file
archivers, filename searchers, file converters, etc. can be
stored here.  The best part of this drawer is that the system
will always check here for a command no matter where in the
system you issue it.  If you are on device DF1: and use the COPY
command, the command will work because although it is not on the
disk in DF1: it is in your 'C' directory.  Take a look at this
directory sometime and see how many goodies there are here.  Like
the LIBS directory, if you go chopping files away out of this
drawer, things like your Workbench (and other programs) may not
work anymore.  This is another directory that you will utilize in
learning to install non-installable software to your hard drive.

                                   FONTS

     Possibly one of the coolest things about your Amiga OS is
the FONTS directory.  This is a drawer of fonts that you can use
inside of word processors, paint programs, and any other program
that might support them.  The fonts are stored in a strange
format.  It may not look like it from inside a well behaved
thought out program, but if you looked at the directory you would
see something like this:

     TOPAZ      <DIR>
     DIAMOND    <DIR>
     topaz.font
     diamond.font

     The .font file is the font's identifier.  This is what you
paint program might look at to tell what fonts you have.  The
corresponding directories contain the actual fonts themselves and
contain filenames that are numbers like 8, 16, 32, 48, etc.
These numbers represent the point sizes of the font that are
available 8 being small and 48 being large.

     There are two major types of fonts; Bitmapped and
CompuGraphic.  Bitmapped are the ones we see above.  They are
limited to the exact sizes that are listed in the directory.
Compugraphic fonts are what we call SCALABLE which means that
they can be any size you desire them to be.  Where as bitmapped
fonts are drawn and saved, Compugraphic fonts are stored as
mathematical functions that tell the computer HOW to draw them;
size means nothing.  It is similar to Postscript for those
familiar with it.  These fonts are bigger and take much longer to
load, but the end result is worth it.  If you try to manually
scale a bitmapped font with your paint program, you will find it
choppy and jagged.  Compugraphic fonts look good no matter what
size.  Fonts are sort of like Libraries.  They are called on
demand instead of included inside the programs themselves.  As
you may have guessed, this directory is also pertinent to
installing non-installable software to your hard drive.


V. USING THE WORKBENCH

     Up to this point we have covered a lot of in depth stuff
about your Amiga.  Now let's go back to the easy stuff and take a
break before we get into the intricacies of the Shell and the
tutorials.

     We talked a lot about the windows, icons, and using the
mouse.  The manual that came with your Amiga can explain most of
the WorkBench to you.  Instead of reviewing the same old stuff
you probably know about already, I am going to take you through
some of the lesser known things about the WorkBench.  Things that
even some of the veterans may not know about.  Oh, one thing
before we get started;  this chapter will discuss Workbench V2.1
since it is probably the most widely used.  Some things will work
for V1.3 and V2.04 and MOST should work on V3.0.

     Take a moment right now to look at your pull down menus on
your Workbench.  Notice the far right menu item that says TOOLS
and the only command under it is RESETWB?  That menu was put
there for programmers who wanted to add their own menu items to
the pull downs.  You can utilize it for your own use!  You can
make menu items that will launch programs, copy disks, or
anything you might want!  There are several public domain
programs like ToolsDaemon and Tool Manager that will help you do
this.  Each program has its own way of doing business so check
the documentation that comes with the program to find out how to
set things up.  It is a lot easier that opening a hundred windows
to get to your favorite programs.

     Being in the WorkBench environment is rather limited, but
you can access a lot of power here all the same if you know what
you are doing.  As you know, not every file has an icon to
activate it.  What gives a file an icon is another tiny file
called the .info file.  This little file actually holds the
graphic information that you see displayed on your WorkBench.  It
also holds the coordinates of where on the screen your icon is
placed when displayed.  As you may already know, you may change
how the icon looks and how it looks when it is selected or
clicked on.  The program called ICON EDIT on your WorkBench disk
or partition will help you do the deed.  There are also several
PD programs that will do it even better as ICON EDIT is pretty
basic.

     Any program that has an icon can be manipulated with the
mouse on the Workbench by simply clicking once on the icon and
using the pull down menus under ICONS to DELETE, RENAME, etc.
Most programs, though, contain more than simply one program file.
Most of them have many data files that go along with it.
Many programmers are kind enough to put related files together in
a single directory for ease of moving, deleting, etc.  If for
some reason this is not the case and you find yourself with a
directory of twenty or thirty programs, here is a little trick
you can do.

     Although it is documented in the manual, many people don't
think about it. You can make the Workbench show you ALL the files
in a directory, not just the ones with icons.  Once all the files
are displayed, you can manipulate them in the standard way.  Look
on the WINDOWS pull down for a command that says SHOW FILES and
select ALL.  Now all the files in that window (drawer) are now
visible with 'pseudo' icons.  Play away!  Another little known
command is the ability to select multiple icons for the purpose
of deleting, copying, etc. to save time.  You will notice that
you can only select one icon at a time.  To rectify that problem,
hold down your SHIFT key while selecting icons.  You will be able
to highlight as many as you want.  Now, you can select delete or
drag ALL the files to another drawer for copying.  Pretty neat.

     Another very basic function that goes unnoticed for the most
part is the EXECUTE COMMAND menu item.  With this option, you may
send a command to DOS just like you were in a SHELL, but not
actually open a SHELL window.  This could be useful if you are
very tight on memory or just wanted to do one single command and
not spend the extra time opening a SHELL.  When activated, it
will open up a requester and you simply type in the command.  It
is a good way to open a SHELL from the WorkBench if you don't
have another fast means to do so.  This command would also be
handy for those with removable media hard drives such the Syquest
drive where they have to execute a DISKCHANGE command when they
swap cartridges.  This way is much easier than opening a SHELL
and doing it.

     Many people like to have custom programs running on the
Workbench such as a clock, Tool Manager, a virus checker, etc.
Now in the old AmigaDOS there was no real easy accommodation for
this.  If you wanted to do this, you would have to learn to use
the SHELL (CLI back then).  Now with 2.0 or better, you have a
neat little drawer called WBSTARTUP on your Workbench disk or
partition.  Any file you 'drop' or copy in there will
automatically be executed for you when your Workbench loads up!
So if you wanted VirusZ to run on startup, just drop the icon in
this drawer and it will be done.  A great tool for those who do
not want to learn the ways of the SHELL.

     In the tutorials coming up, we will discuss how to customize
just about everything about your Workbench including colors,
screen mode, even the pointer and the system beep.  For now,
experiment with your Workbench.  Get comfortable with it.  The
AmigaDOS OS is the most advanced easy-to-use GUI out there.
Enjoy every aspect of it!


VI. UNDERSTANDING THE SHELL

     We have seen how powerful the Workbench is.  With it, we can
do just tons of things.  But, the Workbench was designed to be
easy and elegant; not omni-potent.  While many functions can be
done from it, there is a much more powerful (and therefore more
dangerous) way around AmigaDOS: the SHELL.

     The SHELL is a direct non-GUI method of commanding AmigaDOS.
This interface (formerly called the CLI for COMMAND LINE
INTERFACE) opens up on its own window and has no gadgets, icons,
or pull down menus.  If any of you have been unlucky enough to
have owned or worked with PCs and MS-DOS in the past, you will
feel right at home here.  Many commands of MS-DOS and SHELL are
similar or even the same.  When SHELL is open, it will look like
this:

Workbench:>_

     Now you must physically type in commands to interface with
the system.  The label before the > character is the current
volume (or device) name that you are 'in'.  There are a number of
basic commands and principles you are going to need to know to be
safe with the SHELL.  First, we need to look at a device's
structure, so you know how to navigate around using the SHELL.

     The Workbench is like a filing cabinet, right?  Before you
open any disks or drawers, it is like an unopened file cabinet.
When you click open a disk icon you are opening one of the
cabinet drawers.  When you open a drawer (or directory) on that
disk, it is like opening a file folder in that cabinet drawer.
Then opening another drawer within that drawer is like opening a
file in that file folder in the cabinet drawer, etc.  This is
called a DIRECTORY STRUCTURE or in the PC world a TREE.  Here is
a possible example of a "tree"  using the Workbench disk as the
'file cabinet'.

WORKBENCH
    |
    |--C
    |--DEVS
    |    |-DOS DRIVERS
    |    |-PRINTER DRIVERS
    |             |-STANDARD
    |             |-LASER
    |
    |-FONTS
    |   |-DIAMOND
    |   |-TOPAZ
    |   |-RUBY
    |   |-GARNET
    |
    |-LIBS
    |-S
    |-SYSTEM
    |-UTILITIES
    |      |-DISK
    |-WBSTARTUP

     All the names listed above represent directories (or
drawers) and all have files 'under' them.  Some you might see on
the Workbench, but most of them you won't (unless you select to
show ALL files).  In the SHELL, there is never really anything
'hidden' from view.  That is part of the power of the SHELL.  How
you get from the 'current directory' to the directory you want to
work with is called the 'path'.  For instance, if you wanted to
see what files were in the LASER directory, you would have to
'go' there first, then look or at least tell the SHELL where you
wanted to look.  That is what the PATH is for.  A path should
always be followed by a device name or designation is avoid
confusion.  For instance, in our above example, the path to the
LASER directory is WORKBENCH:DEVS/PRINTER DEVICES/LASER or if
your Workbench disk is in the internal drive you could use DF0:
in place of WORKBENCH.  Using device designations like DF0: is
not only faster but if by some strange chance you have two
devices of the same name there is no question what device you are
working on.

     Navigating around using SHELL in AmigaDOS 2.0+ is quite
easy.  Easier, in fact, than with MS-DOS and much easier than
with the old SHELL or CLI.  To 'move' somewhere you need only
type the path to move to.  If you were in our above example, you
would need only type DEVS/PRINTER DRIVERS/LASER to move to that
directory.  If you were on another device other than Workbench or
in a different directory on the Workbench disk, you would have to
use the full path including the device name (WORKBENCH:)
preceding the path.  You may also want to navigate a single
directory at a time. Here is what a sample session might look
like:

WORKBENCH:>devs

WORKBENCH:DEVS>printer drivers

WORKBENCH:DEVS/PRINTER DRIVERS>laser

WORKBENCH:DEVS/PRINTER DRIVERS/LASER>

-OR-

WORKBENCH:>workbench:devs/printer drivers/laser

WORKBENCH:DEVS/PRINTER DRIVERS/LASER>


     NOTE: If you are using V1.3 or lower of the OS, then you
will need to precede the path with the command CD (for CHANGE
DIRECTORY).  It will also work for V2.0+ but it is optional.

     Now you are in position to see what is in this directory.
Now we are ready to look at file manipulation commands.  Here we
will touch on the most used commands in the SHELL.  Each command
will be followed by the parameters necessary to make it work.  If
the parameter is OPTIONAL it will be in brackets [].  If required
it will be in <>.


     DIR [path]

     The most used command in the SHELL, this will display a list
of all the directories and files in the specified path or the
current directory if NOT specified.  You can get a more expanded
listing of the files by using LIST instead of directory.


     COPY [from path]<files> [to path]

     This command will copy files from the 'from path' to the 'to
path'.  If no 'to path' is specified, the files will be copied to
the CURRENT DIRECTORY.  This command can use WILDCARDS, special
symbols to tag multiple files:
     #? = All files without extensions       #?.#? = All files
                    ? = Replaces one character

     Use the '?' when you have a number of files with mostly the
same letters and just one or two that are different in the same
location.  For instance, if you had three files in the RAM DISK
called ATRAIN1, ATRAIN2, and ATRAIN3, and you wanted to copy all
of them to a floppy disk, here is the command:

     COPY RAM:ATRAIN? DF0:

     Feel free to experiment by copying multiple files to your
ram disk then using the next command to delete them.

     DELETE [path]<files>

     This will remove the files specified.  You may also use the
optional path to delete files in a directory you are not
currently in.  Example, to delete the files in the above example:

     DELETE RAM:ATRAIN?


     TYPE [path]<filename>

     This command will display the contents of a text file to the
SHELL window.  Make sure that you open up your SHELL window
completely to see the maximum amount of text.


     MAKEDIR [path]<name>

     Makes a directory called <name> at the specified path.  It
will NOT create an .info file so you will not be able to see it
from the Workbench.  If Workbench access is what you need, use
CREATE DRAWER from the pull-downs menus on the Workbench.


     ED [path]<filename>

     Starts the Amiga's built-in text editor.  This is like a
mini-wordprocessor.  This will allow you to alter a text file and
save it back again.  Very useful in customizing your system.
More on that later.


     AVAIL

     Tells you lots of information about your system including
how much memory you have/have left.


     CLS

     Clear screen.  While you can call this command directly, it
is much more useful in a series of commands called a 'script'
file.  For MS-DOS users, this is called a BATCH file.  We will
talk more about scripts a little later.


     ASSIGN <device:> <device:>[path]

     This is going to be one of your most used commands as you
get deeper into the Amiga.  This command will allow you to
'redirect' access of one device to another, allowing you to put
files just about anywhere you want and still access them.  For
example, you have a Backgammon game on a floppy disk 'GAMMON'.
You copy all the files into a directory on your hard drive so you
can play it from there instead of the slower floppies.  You put
it on DH0: under the directory GAMES.  So, you try and run the
game and after it loads the main game it tries to load the data
files required for play.  Since the game KNEW it was on a disk
called GAMMON, it tries to look at that disk for the files and
give you a requester tell you to put the disk GAMMON back in any
drive.  Well, you could put the disk back in and let it load the
data files, but that would be defeating the purpose.  Instead,
let's redirect the request to the directory on the HD where the
game actually is.
     ASSIGN GAMMON: DH0:GAMES/

     Now, all subsequent calls for the disk GAMMON will go to the
right place.  As you may have guessed, this is one of the main
tricks for getting programs to work on the hard drive that were
not intended to installed there.

     That is enough SHELL information to get you started.  There
are literally hundreds of commands you can execute from the
SHELL and you could see them if you get a directory of the
directory named 'C' on your Workbench partition.  Or, look in
your manual for more commands.

     The SHELL is a powerful alternative to the Workbench.  The
SHELL and your 'C' directory are tightly interwoven and it is
useful to add your own special commands to the system by copying
the commands over to the 'C' directory so you may use them
anywhere.  Put all your compression programs like LHA and DMS
here as well as your own text editors, icon editors, etc.


VII. "LET'S DO IT" TUTORIALS

     A. Formatting and Preparing Disks

     This may seem like a trivial tutorial, but there are several
things you can do to customize a newly formatted disk to suit
your needs.

     First, insert the disk to be formatted.  An icon will appear
telling you either the old disk name if it has been formatted
before, or question marks if it was formatted for some other
computer or not formatted at all.  Click it once and select
FORMAT DISK from the ICONS pull down menu.  If you format it from
the Workbench this way, you will not be given any custom options
to set.  If order to have some control over the formatting,
select the FORMAT utility on your Workbench disk or partition.
Select the drive to format.  You will then be presented with a
requester asking you some pertinent information like the disk
name, whether you want a quick format, international mode, fast
file system, and if you want a Trashcan icon attached.

     International mode is something you will likely never need
so leave that unselected.  If you are using 2.0+ of AmigaDOS, you
may format floppies in the FAST FILE SYSTEM which makes your
floppies faster and hold slightly more data.  Make sure that you
do not intend to use this disk on a 1.3- version of the OS
because it will not be able to read it.  If you are not sure, do
not select FFS.  We already know that the Trashcan is worthless,
so do not select that.  If you disk has been formatted on your
Amiga before and you KNOW that it is standard with NO errors you
may select the quick format option.  This does not erase the
entire contents of the disk, just the bootblock and the directory
track (track 40) where the names of the files are stored.  This
makes formatting very quick since it only has to format two
tracks instead of 80.  But, any errors or bad tracks on the disk
will not be discovered this way.  Also, disks that are non-
standard DOS cannot be formatted quick.  You can determine a non-
standard DOS disk by the disk name when inserted and read from
the Workbench.  The name will read DF0:NDOS for example,
depending on which drive you insert it in.

     Now that you have all your options set, go ahead and begin
the format.  If you do not do a quick format, this can take a
couple minutes.  Any errors that occur will abort the format
process.  Should this occur, you have a couple of options.  You
can discard the diskette as it is probably bad.  You may also
elect to use a program to 'tag' the bad blocks out of commission.
This will allow you to use the disk to hold information, just not
use the bad blocks.  Obviously, this will effect the amount of
space your disk can hold.  It is a personal thing, but the right
answer is to discard it.  Chances are good that more bad blocks
will develop quickly as you use it, since the media itself inside
the disk is likely defective.

     Now that you have a nice clean disk, you may want to tailor
it up a little.  First thing you might want to do is make the
diskette bootable.  To do that we need to issue one command from
the SHELL or use EXECUTE COMMAND from the Workbench:

     INSTALL DF0:

     This command will INSTALL a bootblock on the disk's
bootblock (track 0) track.  Now, when you reboot your system,
this disk will 'boot' up over your hard drive or any other
devices.  This bootblock contains information the OS need to know
to start up the system using that disk.

     Should you try and boot from this disk now, you would be
dumped right to a SHELL prompt as soon as the disk booted.  Since
there is no 'C' directory, LIBS directory, DEVS directory, etc.
there is really nothing you can do from this prompt.

     We have discussed the file called STARTUP-SEQUENCE before
(located in your 'S' directory) now it is time to apply it.  If
you have boot your system off this new disk, reboot using your
Workbench disk or partition.  We will need the utilities there to
do this tutorial.  Once booted, enter a SHELL.  Insert your new
diskette into DF0.  Now make a new directory on the diskette
called S.

     MAKEDIR DF0:S

     This will make a new directory for the STARTUP-SEQUENCE
file.  We will also need a C directory to hold some commands for
us to use.

     MAKEDIR DF0:C

     Now let's copy over the commands that we need:

     COPY C:TYPE DF0:C/
     COPY C:LOADWB DF0:C/
     COPY C:ECHO DF0:C/
     COPY C:AVAIL DF0:C/

     This will copy over the necessary four commands we are going
to use to make your disk.  All of these commands are 'stand
alone' i.e. they do not require any libraries or devices to work.
Notice how we copied files from the 'C' directory using C: as the
device name?  That only works with a few directories such as 'C',
'S', 'LIBS', and 'DEVS'.  Basically, the system directories used
by AmigaDOS.

     Now that we have at least a FEW commands to work with, let's
make the disk do something.  From the SHELL we are going to make
a STARTUP-SEQUENCE file in the 'S' directory of our new disk:

     ED DF0:S/STARTUP-SEQUENCE

     In a moment, ED will load and be ready for you to input
text.  ED is like a miniature word processor.  If you are running
V1.3- of the OS, ED is not very friendly.  Consult your user's
manual for more information on its commands.

     Take a moment to look through the pull down menus.  You will
find that most Amiga programs that use pull downs keep common
things in the same basic location.  For example, most programs
have the load and save options in the menu on the far left.

     As we said before, the STARTUP-SEQUENCE is a script file.
Basically, it is a text file with a list of individual commands.
Let's enter the commands now into ED.

ECHO "HERE IS WHAT YOUR SYSTEM HAS AVAILABLE:"
AVAIL
TYPE S:WELCOME.TXT
LOADWB

     Now, select to SAVE the document using the pull down menus.
Your drive light will come on and in a moment, the file will be
saved.  Now we have a workable disk with one exception.  Do you
know what it is?  Hint: Look in the text we entered for the
STARTUP-SEQUENCE.

     That's right.  The command TYPE (which displays a text file)
is looking for a file called WELCOME.TXT to display during the
startup.  Let's rectify that problem.  Exit ED by using the
appropriate pull down menu.  Now, re-enter ED:

     ED DF0:WELCOME.TXT

     Once again, you will find yourself in ED with an empty
screen.  Enter some little message like:

     NOW LOADING WORKBENCH...PLEASE WAIT

     Save it as you did before.  NOW your disk is ready for the
test.  Go ahead and boot it up and revel in the magic you just
created!

     Now that you are at a Workbench (and saw how fast it
booted), you may wonder why it takes so long for your own
Workbench to start up.  A good question which is easily
explained.  In fact, you know yourself how to do it and already
possess the knowledge to do it.  How?  Look at your Workbench
disk's STARTUP-SEQUENCE file and see what IT does for a startup
and you will understand why it takes so long.  Use the TYPE
command or even better, a new command called MORE.

     MORE S:STARTUP-SEQUENCE

     This will load up a 'text reader' which is slightly bigger
than TYPE, but also gives you more options like pausing at each
page, searching for text, etc.

     In the next part, we will discuss customizing features like
the pointer, icons, colors, and much much more.

     B. Configuring Your Workbench and System

     We have delved pretty deep into the workings of AmigaDOS by
now.  You have lots of knowledge of the basics.  Now let's do
some 'aesthetics'.  There are a million or more things you can do
to your Workbench environment  to customize it.  We are going to
discuss some of the finer points.  Those that make the most
difference.

     One of the easiest ways to customize your Workbench is
through the incredible built-in preference utilities included
with Workbench.  This chapter will deal strictly with V2.0+, but
there are similar things in 1.3-.  In almost all of the
preference utilities, you will be given the final option to SAVE,
USE, or CANCEL the utility.  SAVEing is permanent.  The things
you make changes to are more or less permanent (not for us,
though!).  It you select USE, the item will only be changed until
the next re-boot.  Therefore, you can 'try before you buy'.
CANCEL of course, negates the changes you just made.

     Colors.  The first thing is to change the system colors.
This is done through the PALETTE program in the PREFS drawer of
your Workbench.  It is pretty self explanatory once you get it
running.


     Pointer.  You may change the appearance and colors of the
pointer using the POINTER program in the PREFS drawer.  Again,
this is pretty self explanatory.  Note:  You cannot change the
'busy' pointer from this utility.  A program called NICK-PREFS
(widely available) will allow you to do this and some other
really neat alteration to your Workbench.

     Screen mode.  You may change the Workbench to any legal
resolution available including Low Res, Hi-Res, Interlace, and
even Super Productivity as well as change the number of colors
available to you to alter.  Remember, though, that higher
resolutions and more colors eat more memory and also tend to slow
down the system.

     System Beep.  The utility called SOUND in your PREFS drawer
will allow you to change what happens when your system gets a
requester or error.  You may make the screen flash, make a beep,
or even put your own digitized sound sample there in place of the
beep.  My Workbench does a Butthead 'huh huh huh' laugh when I
get an error.

     You may also change the font that all the Workbench text
uses to display drawer names, filenames, and much much more.  All
you have to do is go through the PREFS drawer and play with the
utilities that are there.  You can set the system time and date
here, change your printer drivers, set up your serial port for
your modem, and tons more.  If you are ever confused by one of
the PREFS utilities, just CANCEL out of it and refer to the
manual.  Most of them are far too easy to use and can really
change the way your system looks, acts, and functions.  Make use
of them and tailor your system like no loser IBM can.

     Now that you have got your system JUST the way you want it,
you might want to make a 'snapshot' of it to save in case of a
disk crash or to copy these prefs to another bootable disk (like
the one you just made).  The magic is SO easy you may not believe
it.  There is a SINGLE file that keeps the magic.  It is located
in the DEVS directory and is called SYSTEM-CONFIGURATION.  As you
may have already guessed, you need only copy the file to the
destination disk's DEVS directory and you will now have the same
prefs as your normal Workbench disk.  Enter a SHELL, insert your
bootable disk made in the last tutorial into DF0.  Now you should
know what to do, but we'll go through it anyway.

     MAKEDIR DF0:DEVS
     COPY DEVS:SYSTEM-CONFIGURATION DF0:DEVS/

     It is done! Re-boot using your new disk and you will see
that all the preferences of your Workbench now reside on this new
disk!

     Now that we are on the subject of making copies of important
files on your Workbench disk or partition, let's go a step
further.  If you are using a floppy version of Workbench, it is
just plain smart to make a copy of it and use the copy.  When you
alter it, make a copy of the ALTERED version and leave the
original Workbench disk alone.  Now you will have two extra
Workbench disks; one ORIGINAL and one of the altered.  If you
want to use the default preferences, you simply copy over the
SYSTEM-CONFIGURATION file from the original to your copy of
Workbench.  If you disk crashes, you need only make a copy of the
altered Workbench disk and use it.

     If you use a hard drive, you have a bigger task ahead of
you.  You will no longer need the floppy disk of Workbench once
it is installed on your system (of course you will keep it in
case of a hard drive crash).  But, with a hard drive, a new task
comes to bear down.  Making a backup of your system files.

     It is important that the Workbench system has its own
partition on your hard drive.  I recommend a 10 meg partition if
you have 40 or more megs of space.  If you are using a 20
megabyte drive, you can get by with 5 megs or so.  If you do not
have your hard drive partitioned, you should.  By having the
drive 'cut' into several smaller pieces it is easier to group
files, make backups, optimize, and more.  Refer to your hard
drive manual for more information on partitioning.  You will find
that as time goes on, your Workbench partition will grow like a
weed.  It is best to backup that partition every couple weeks or
so using a special program to do so like Quarterback or Ami-Back
(both commercial) or MRBackup (public domain).  Most of these
programs require one disk per meg of hard drive to back up so
your Workbench partition would require about 10 floppies if full.
I have had mine for a LONG time and haven't filled the whole 10
megs yet.  You may also elect to use the SHELL to copy important
files like the STARTUP-SEQUENCE and SYSTEM-CONFIGURATION and
those important fonts, libraries (like the ARP.LIBRARY), and 'C'
commands to a floppy.  Believe me, it is much easier to use a HD
backup program.

     As you install programs to your hard drive, many of them
will copy over necessary libraries, 'C' commands, fonts, etc.
This is how your partition grows.  When you remove a program from
your hard drive, you often forget to remove these 'support' files
(if you can even remember what they were!).  As it stands, most
of these support files can be used by you in other ways either
through the SHELL ('C' commands), other programs (libraries), or
word processing/graphics packages (fonts).  Therefore, they are
not really wasted space.  Sometime, when you are bored, look
through your Workbench directories and see just how much stuff is
really in there!


     C. Using PAL and NTSC; How to switch your system!

     We discussed what PAL and NTSC are, now we need to look a
little bit deeper into it.

     First, how to change.  The easiest way, overall, is to
install a toggle switch into your machine to let you boot up in
one of the two modes.  Commodore was actual smart this time and
built the capabilities into the FAT AGNUS chip.  To make the
system PAL, you need only ground out one of the pins on the chip.
If you needed an NTSC machine, simply fail to make the
alteration.  This made it ten times easier to get the machines
into Europe.  Since this goes beyond the scope of a beginner's
guide (any authorized dealer can make the adjustment as well as
many Amiga hobbyist) we will skip this option for now.  It may be
nice to know that if you have an AGA Amiga (A1200, A4000) you may
select to boot your system in PAL by holding down both mouse
buttons when your machine boots.  A special menu will come up and
get you the option.  If you are using V2.0/2.1, holding down the
mouse buttons on bootup will allow you to disable certain drives
or change the drive to boot from.

     Now the other way is through the use of software.  Note: You
must have a FAT AGNUS or FATTER AGNUS to make this work.  There
are many popular programs to do this.  First there are the 'C'
commands written by Nico Francois called PAL and NTSC which will
switch the system for you when you run the respective program
from the SHELL or EXECUTE COMMAND menu item from the Workbench.
There is another version of the command PAL which will change to
PAL if run or NTSC if run with the left mouse button down.  I
prefer the latter of these two.  Another way is through the use
of special commands called PALBOOT and NOSPAL.  These will write
PAL bootblocks to diskettes so that when they boot, they change
to PAL right away.  One is for standard disks and the other is
for non-standard disks like European Demos.  I use NOSPAL a lot
since it works on just about every demo I have and it will NOT
kill the current bootblock (unless instructed to) but append
itself to it.  Invaluable.  Oh, by the way, most of these
programs can be found in PD collections or on most major BBSs
that support the Amiga.  Another little program from the old
Amiga is PALCON which will change the system into PAL the next
time you reboot.  This tends not to work with newer Amigas.  The
final way (and the best way in my opinion) is through the use of
a program called DEGRADER.  This little gem will not only control
PAL/NTSC but will also allow you to fool the computer into
thinking you have a different memory configuration than you do
(no FAST RAM, a HALF MEG OF CHIP RAM) in order to allow older
games to work right, turn off accelerator caches, change disk
drive configurations, and more than I care to type.  Needless to
say, it is more valuable than words.  It will survive reboots if
required and can change the system IMMEDIATELY without resetting
the machine.

     I highly recommend picking up one or more of these excellent
utilities for shifting your system into PAL, since most of the
best Amiga stuff comes from Europe.  If you can find someone to
put that PAL switch in for you, fantastic.  You will love it.
Remember, with these programs you can further customize your own
disks by adding one of the PAL commands to your 'C' directory and
adding the command PAL in your disk's STARTUP-SEQUENCE.  You can
do this for Euro Demos/games that are not non-standard DOS.


     D. File Manipulation Using DirWorks

     Unless you have $60 laying around to buy Directory OPUS,
then you are probably in possession of this fantastic program
called DIR WORKS (DW).  This utility is INVALUABLE to every Amiga
user and is just as powerful as it's expensive cousin.  DW will
set you back $15 if you pay the man for his work and I highly do.

     Since it is so configurable, yours may not even be close to
mine.  But, we will go over some of the basics to get you going.

     Let's start with the pull downs.  There are some that are
very self explanatory.  The configuration editor we will get into
in a minute.  The rest are pretty easy.  A couple of things to
draw your attention starts with the command DISK OPS or
operations.  Here is a nice fast way to copy and format disks.
Now that you know the hard way to do it, now you can do it the
easy way.  DW will also allow you to format more that one disk at
a time.  Simply select the source drive (on top) and the
destination drive (on bottom).  You may select as many
destination drives as needed/available.  If you format a disk, it
will format all the selected destination disks.  If you DISKCOPY,
it will copy the selected SOURCE disk to all the selected
destination disks.  The gadget that reads BLANK can be changed to
a new name which will be the name of all disks formatted.  Note:
If you are using a newer OS, the INSTALL command (used to make a
bootblock) will not write to the disk properly.  Do this from the
SHELL which is also an option on the pull downs.

     As you can see, there is already a large arsenal of
utilities here and we haven't even gotten around to the meat of
the program yet.  Let's talk about the two large windows on the
screen.

     These windows are where the functions take place; copying,
moving, etc.  Right now there may or may not be anything in them.
Each window holds a directory.  To bring up a directory on the
left window, click the left mouse button on a device under the
window like DF0: or RAM:.  The contents of that device will
appear in the window, probably sorted alphabetically with
subdirectories on top (probably in blue) and files underneath (in
black).  The files will have their size in bytes next to them.
to bring up a directory in the other window, you may click the
left mouse button on a device under THAT window, or click your
RIGHT mouse button on a device under the LEFT window.  You can
use either set of device buttons to bring up the device in either
window.  Just remember to use the mouse button that correlates
with the window you want to bring up if the device buttons aren't
under the window.  Play around with this concept for awhile until
you are comfortable with it.  Now bring up your Workbench device
on the left window and the RAM device in the right.  We are going
to use them both.

     You may enter a directory in one of the windows by simply
double clicking the directory.  In a moment you will see the
contents of the new directory.  There will be a little gadget
window (probably underneath or above the main window) that will
show you the window's current path.  You can click in this gadget
and enter a path manually to bring it up if you don't want to
manoeuver around with the mouse.  You can go back ONE directory
by clicking the gadget labeled '/'.  To go back to the ROOT
directory, simply click the device gadget again or keep clicking
the '/' gadget.

     DW is what some of us call an auto-launcher.  In other
words, DW determines what kind of file it is and automatically
knows what to do with it.  If it is a picture file (IFF/HAM) it
will display it.  If it is a digitized sound, it will play it.
If it is a text file, it will display it.  If it is a
compressed/archived file like LHA, LZH, DMS, LZ, etc. it will
show the contents of the archive or unarchive it to the
destination directory.  If it is a program, it will ask you if
you want to run it.  Pretty neat.  This it does without ANY
interaction from you except to double click the filename.  Some
functions, like unarchiving an LHA or DMS file require that you
click the right mouse button on the filename.  In any right
button evolution, the output of the action is sent to the other
directory highlighted in the other window, as is any other
command such as copy, move, etc.

     Let's practice a little bit.  You should have your Workbench
directory in one window and RAM in the other.  Now, highlight a
couple of files (or directories for that matter) and select COPY
with the left mouse button.  The directories (and their contents)
and all the files you selected are copied to the other window!
It is that simple.  If you were to have selected MOVE the
directories and files highlighted would've been copied then
DELETED automatically.  Be very careful with the MOVE and DELETE
commands.  If you had selected DELETE, then all the highlighted
directories and files would've been deleted.  Delete the
directories and the files you just copied out of your RAM disk.

     There are some other GREAT commands such as AdIcn which will
add an icon to all the files selected.  This will also add icons
to the directories selected as well.  EScpt which will execute a
highlighted script file.  PLAY will play all the highlighted
sound samples.  SHOW will show all the highlighted picture files.
LHA A will take all the highlighted files and directories and
make them into a compressed archive (if you have LHA in your 'C'
directory).

     It is a very simple program that just takes a little getting
used to.  I have gone over the simple and the most powerful
commands.  Feel free to copy some files over to the RAM disk and
experiment.  If you are going to practice on disks, use the write
protect tab to keep your data safe.  This program is also widely
available and should be part of your collection if it isn't
already.


     E. Virus Prevention and Information; Protect yourself

     Possibly one of the most important parts of this guide (and
the most interesting) is this chapter on virus prevention and
information.  Many people know what a virus is, but few know how
they work and subsequently do not know how to stop them.  We need
to know a few things before we get into the depths of viruses.

     Let's begin with a little history of viruses.  Viruses have
been around since the beginning of the personal computer age.
There have been some truly vicious viruses created and for quite
awhile, people lived in fear of trading software and downloading
files from computer bulletin boards afraid they would be infected
unknowing and losing their data.  Soon, more people learned
about them and developed programs designed to scan your system
for viruses and remove them AFTER the damage was already done.
Finally, they came up with ways of catching viruses in the act,
since there is only a couple of ways they could spread.

     Early viruses on the Amiga were relatively harmless.  Once
of the first major viruses to hit this computer was the SCA
(Swiss Crackers Association) Virus that, at a random point, would
take over the computer and say "SOMETHING WONDERFUL HAS HAPPENED!
YOUR AMIGA IS ALIVE AND HAS BEEN INFECTED WITH A VIRUS".  It DID
have the habit of destroying your bootblocks but that was the way
it spread.  It didn't erase your disks or trash your hard drive.
Later on, when people started getting wise to the bootbloack
virus, they invented a virus that attached themselves to any file
you executed.  Your files would grow each time you ran it, as it
continued to tag another copy of the virus at the end.  Some file
viruses actually replaced the last part of the file with
themselves.  Some programs could survive, but most did not.
Others followed, some called them TROJANS after the famous horse
disguised army.  These would do nothing until a given date (the
programmer's birthday for instance) then do something ugly.  In
the late 80's a virus called MICHAELANGELO took the world by
storm.  On the famous artist's birthday, a picture of the man and
a story popped up on the screen.  While you were reading the
text, the virus proceeded to erase your hard drive.  Gruesome,
eh?  This was a PC virus, but it made USA TODAY and slapped the
world in the face.  Some people saw the virus a day early (their
clocks had gained time over the years and they gained a day) and
warned people.  That day, thousands of people refused to turn on
their computer.  Even years later, people still left their
computers off on that day.  Other viruses are not so kind.  An
erased hard drive can be recovered (now) but a broken one can't.
One virus tricked the computer into thinking that your hard drive
was bigger than it really was and send the hard drive in search
of a track that didn't exist.  After banging away for a couple of
seconds searching for a phantom file, the hard drive would die.
That is brutal, folks.  Now let's get back to the present, more
learned society.

     First, the definition of a virus.  Any program that is
written to continue its life after the computer is shut off by
replicating itself and is USUALLY created to damage or otherwise
adversely effect the computer.  There you have it.  Better than a
text book, eh? (grin)  That sums it up, though.  It HAS to be
able to survive when the machine is turned off.  We already know
that a virus can live after a reboot.  But, as any computer guru
will tell you, a virus cannot survive if the computer is shut
off.  That is HALF true.  If the virus has NOT yet begun to
replicate, yes you can kill it this way.  Most of the programmers
that create viruses know this and make it replicate itself as
soon as it enters the system.  More about that in a minute.  Just
remember, there is no magic behind viruses.  They are just
programs coded by a programmer.  Since they are coded, they can
be identified BY that code.  That is one way we can find and kill
it; based on it's 'fingerprint'.

     Now that we know WHAT it is, let's look at HOW they work.
This is universal knowledge for ALL computers.  Viruses work the
same on all computers.  Some just have more ways of getting the
virus.

     There are two major types of viruses but they replicate in
different ways.  These types are called Bootblock Viruses and
Filelink Viruses.  Each spreads a different way and survives a
different way.  The common element which makes it almost
IMPOSSIBLE for viruses to infect protected machines it that the
virus must patch itself into the OS in order to spread and/or
survive.  A bootblock virus must be able to tell when a disk has
been inserted so it patches itself into the floppy device.  The
virus must be able to restart itself after a reboot, so it makes
the reboot vectors (areas that are updated after a reboot) point
to THEM to re-enable the virus in addition to restarting the
system.  You can be 100% protected as long as NO PROGRAM CHANGES
THESE VECTORS!  Modern day virus checkers check several times a
second to see if these vectors have been altered.  If so, it
intercepts and tells you that the vectors have been altered and
asks you if you want to clear them.  A simple yes will stop the
virus on the spot.  Even an unrecognized virus cannot take your
machine without you letting it.  If it is recognized, the checker
will kill it.  Let's look at the causes and effects of both
viruses.

     Bootblock Viruses spread and live on the bootblocks of your
diskettes.  Remember we said that the bootblock could contain a
small amount of code?  Well, it is enough for a virus.  Once you
boot the disk, the virus enters memory and waits for you to reset
the computer or insert another disk.  When you do, it checks to
see if another disk is in the drive.  If it is, it copies itself
to the bootblock, effectively destroying any other code that is
there.  If the program required a custom bootblock to load the
disk (non-standard DOS disks require this), the disk is now
completely worthless unless you have another copy somewhere.
Thus, the chain goes on.  Every disk inserted or booted gets
infected.  Even if you catch the virus in your machine it can
still live on your disks.  Once the virus is caught, every disk
SUSPECTED of containing it must be checked and cleaned.
Fortunately, most of the modern day virus checkers will check
every disk inserted while it is 'on duty'.   The only real way
that a virus can sneak back into the system is if you don't use
the disk while the checker is running by booting off of it
instead of the disk with the checker on it.  Even after it is
caught, chances are that the disk's bootblock is unrecoverable.
The solution, though, is what they call a Bootblock Lab that
let's you make copies of all your disk's bootblocks and restore
them if you need them.  Most bootblock viruses are easily caught
once they enter the system, but can exist on your diskettes for a
LONG time before you put them in while the checker is running
(disks that are unusable from the Workbench, for example).  I
found a virus on a disk that was several YEARS old and never
caught it.  The reason is that in order for a checker to catch
the virus BEFORE it enters memory, it must know what to look for
on the bootblock.  It must have a fingerprint to compare with.
These are known as bootblock 'brains', files that contain what
the viruses look like.  When you insert a disk, the checker
compares the bootblock with the brainfiles and if they match, the
checker alerts you and asks if you want to dispose of it.  Many
times, the removal will destroy the bootblack, possibly rendering
the disk inoperable, even if it was operable while the virus was
there.  Better this than spreading the virus.  My problem was
that at the time I got the disk, my checker's brain didn't have
an image of that bootblock to compare with.  Now, though, most
checkers know what is a normal bootblock and what is a foreign
one.  If it doesn't recognize it, it tells you so and asks if you
want to overwrite it with a normal one.  If you do, and it was a
non-standard DOS disk, say good-bye to the program.  Some
checkers are even smart enough that you can tell it to memorize
an image of the bootblock and remember it so that next time you
put it in, it doesn't cry over it.  Neat eh?

     The second type is called a Filelink Virus.  This attacks a
file directly and attaches itself either to the end or takes up
enough room WITHIN the file to restart itself when the file is
run.  So, when you shut off the machine, then turn it back on
(virus gone, eh?) and run the file, it is back on and ready to
corrupt.  Most viruses attach themselves to files that are
DEFINITELY going to be run when the computer starts up (like,
say, ANY file in your startup sequence?).  Now, every time you run
a file (or start your system), the virus attaches itself to it.
Now you give a copy to a friend, put it on floppy, etc. and it
gets away.  You get the idea.  Most of the time, these viruses
are the ones that format your hard drive or put your system on
the blink.  They may also erode enough of your file away little
by little so that it works for a couple of 'virus attachments'
then dies mysteriously.  The only way to catch this one without
letting it into memory is to do a file scan on the disks that are
suspected of containing a virus.  Again, an image in the brain
must be available for that virus to be identified and removed.
In this case, the checker cannot say 'Unknown Bootblock' or in
this case, 'Unknown file' because every file on your disk is
different; not standard like bootblocks are supposed to be.  That
is why new viruses must be reported and analyzed right away so
that the coders of the checkers can add the image to their
'brains'.  Again, not to fear because even though your checker
may not be up to date to identify the virus, it will stop it when
it attempts to take control of your system.

     As you can see, viruses are a very little threat if you have
the right protection.  Fortunately, unbelievable checkers are
available right in the Shareware and PD field for little or no
cost.  The ones I recommend (in this order) are VirusZ II,
VirusZ, and Virus Checker.  For the most part, these are the
full-featured big boys.  They handle just about every virus known
to man and are updated quite often.  I use VirusZ II personally.
Add this program to your system and place it in either your
STARTUP-SEQUENCE or just drop a copy of it in your WBSTARTUP
drawer and it will be run automatically at startup.  It is
protection you can't live without.

     Other ways you can protect yourself include file scanning
all new programs you get from BBSs or, if the disk is non-
standard, put it in the drive while your checker is running.  Do
these BEFORE you run the program.  Do the same with any files or
disks brought to you from other suspectable sources.  Urge your
friends to use a checker.  Encourage your local BBS to install
software that checks incoming files for viruses.  Then, leave the
rest to the checker.  Using these principles, I have remain virus
free for years.  You can too!


     F. Installing programs to Hard Drive without an Installer

     Some people might have gotten this guide for this section
alone.  Up until now, we have learned some MAJOR tricks of the
trade and even lightly touched THIS topic a little bit.  Now, you
are going to learn the knowledge of years of experience in a few
minutes.  We are going to learn how to take those pesky, no hard-
drive installer havin' programs and put them on the hard drive.

     One of the very few things the PC world has over us is the
fact that EVERY program released can be put on the hard drive.
Not so in the Amiga world and I will tell you why.  Most quality
products come from Europe, a place where they have very little
money for buying toys for their computers.  This is the main
reason they bought an Amiga to begin with.  No sound cards, video
cards, game cards, etc. to buy; it was all built in.  Since most
of the early Amigas didn't come with hard drives, very few could
afford to buy them.  Therefore, the market for hard drive
installability was low.  In addition to that, programmers found
out that by rewriting the DOS system to their own specifications,
they could get incredible loading speeds off of a diskette as
well as compress the data immensely.  Thus the non-standard DOS
disk was born.  The wait times for the game to load up levels,
etc. were dramatically lessened.  What the programmers also found
out is that they could implement a whole new breed of copy
protection with this system.  Since they could encode the disks
any way they wanted (and justify it with speed increase) they
could also encode it so that copiers could not copy it.  The only
way it could be pirated was to decompress the disk, decode the
disk, remove the protection checks, then release it to the world
in a format that anyone could copy.  (This is in violation of
Copyright law and is therefore quite illegal but it is a way of
getting your LEGAL one copy backup.  Of course, it is for your
own use and may not be lent out or use by anyone else).  Anyway,
this tended to increase the number of disks it occupied, but when
you are not paying for the software, what difference does it
make?  Anyway, the system became so popular that almost all the
game market adopted this standard.  As we all know after reading
the guide to this point, non-standard DOS disks cannot be run
from the hard drive.  Some companies changed over to the PC-
popular 'code word' protection that required the user to look up
a word in the accompanying manual and type it in before the
program would continue.  Now, you could transfer these few
programs over, but the majority of the world continues to use
non-standard DOS.  Some hackers/pirates have even created another
way to not only copy the non-standard DOS disks but to allow you
to install them on your hard drive.  What they do is make an
image of all the disks and load them all into your RAM to be
executed.  Sure it works and it is fast, but it also requires you
have a meg of RAM for each disk it loads and you cannot cleanly
break out of it back to your Workbench.  Again, this is illegal
if you don't own a purchased copy of the game.  Still, it is an
alternative to the lack of a hard drive installer.

     Another problem also exists.  The disks that ARE standard
AmigaDOS disks but for some reason didn't include an installer
and won't seem to run from the hard drive if you copy the files
over manually.  Ah, now here is something we can do something
about.

     Let's start with what we CANNOT do.  We cannot take non-
standard DOS disks to the hard drive.  Period.  End of
discussion.  Finis.  The only option you have for running this
kind of program is to get a copy of it from the Underworld of
Pirates or hackers.  Insert the first disk into the drive and if
you get the old DF0:NDOS name, forget it.

     Here is another 'no way' deal.  If the disk is standard
format and you can get a directory, look for a file with no name
and a small size (or a size of zero bytes).  If you see this
phantom file, forget it.  It is protected by a copy protection
system that we cannot fix here.  In this case, I recommend you
buy one of the copier programs designed to take this kind of
scheme off.  The only one I KNOW of that will do this kind of
work is a program called MAVERICK which is rumored to specialize
in taking disks like this and making them hard drive installable.
The one disk that comes to mind is the old Broderbund game STAR
WARS.  That had this exact protection scheme on it.  Your only
other option here, again, is to seek an unprotected copy from a
pirate.  It may or may not go on the hard drive.

     Okay, now you are thinking "What the hell CAN I put on my
hard drive??"  Well, fortunately, most of the newer games that
require more than one or two disks come with very friendly
installers.  Many that don't can still be easily copied over and
forced to work.  Here is the step by step guide for HD
installation.  Keep doing them in order until one of them works
or until directed to skip to a different step.  In order to make
things more clear, we will say that the name of the game is
called SINISTAR and it has three disks to it named SINI1, SINI2,
and SINI3.  It does NOT have a 'phantom file'.

     Step 1 - Insert the first disk into the drive and open in up
on your Workbench.  Is there an icon for an INSTALL or INSTALLER?
Use it and install the program following the on screen
instructions.  Stop here.

     Step 2 - Enter a SHELL (or use DW) and look at the contents
of disk 1.  Is there a file that is called INSTALL or INSTALLER?
If so, go to the SHELL (if not already there) and go to the disk
using the CD command or just typing the name of the drive (i.e.
DF0:).  Type EXECUTE INSTALL or EXECUTE <the filename>.
Sometimes the programmer forget to add an icon to the installer
or just forget to mention in the instructions that one exists.
This is not uncommon.  If not, continue.

     Step 3 - Make a new directory on your hard drive for the
program and make sure you add an icon using DW (or use the
Workbench NEW DRAWER command).  If you don't know how to do this
yet, you had better go back and read some more! <grin>  Now using
DW, Workbench, or the SHELL, copy all the files and directories
from all the disks into this one drawer.  Put the disks away in a
safe place; we won't need them anymore.

     Step 4 - Open this new drawer.  Is there an icon for the
program there?  If so, go on to the next step.  If not, you must
determine which file starts the program and add an icon to it.
Guess how?  CHECK THE 'S' directory for a STARTUP-SEQUENCE and
see what it reads.  If it contains more than one file, then copy
the STARTUP-SEQUENCE into the directory with all the other files
and directories.  Use DW to add an icon to the newly placed
STARTUP-SEQUENCE file.  From Workbench, select the icon and use
the pull down menus under ICONS and select INFORMATION.  IN the
gadget box marked DEFAULT TOOL put the text

     C:ICONX

     This will cause this icon to execute the file as a script,
running all the commands in it.  We discussed scripts earlier and
the STARTUP-SEQUENCE is a script, after all.  If the STARTUP-
SEQUENCE only had a single command (filename), add an icon to
that filename using DW.  If the file you just added an icon to is
a script (double click it from DW and see if it displays text)
too, then you will have to change the DEFAULT TOOL as described
above to C:ICONX so it will execute right.

     Click the icon (the one that existed or the new one you just
created) it and see what happens.  Follow the chart below based
on what happens next:
     - Did you get an error from the Workbench that said THIS
ICON HAS NO DEFAULT TOOLS?  You didn't add the C:ICONX command to
the icon properly.  Recheck using the above paragraphs.
     -Does the program run properly?  End here.
     -Did you get a requester saying INSERT <name> INTO ANY
DRIVE?  If so go to step 5.
     - Did an error message come up saying COULDN'T FIND <name>
or MISSING FILE <name> or UNABLE TO OPEN FONT <name> or something
similar?  Go to step 6.
     - Did the program just lock up and stop running with no
explanation?  Go to step 5.

     Step 5 - You must try to ASSIGN the disks to the directory
you made and copied the files to.  We described how this works
earlier in the guide, but using our example stated above, enter a
SHELL and type these lines:

     ASSIGN SINI1: <path of new directory>
     ASSIGN SINI2: <path of new directory>
     ASSIGN SINI3: <path of new directory>

     Now go back to step 4 and try it again.  If it all works,
you need to type these lines before you run the program or you
need to add them to your STARTUP-SEQUENCE or the USER-STARTUP
file.  We haven't mentioned this before, but the USER-STARTUP is
also located in the S directory and most programs put their OWN
ASSIGN commands here.  It is a perfect place to put yours now
since it is always executed on startup, too.  This is a 2.0+ OS
thing.

     Step 6 - Are there directories required by the system in
this new directory like C, S, DEVS, LIBS, FONTS, etc.?  If so,
copy all the files from these directories to their respective
directories on YOUR workbench partition.  The program probably
needs a font, library, or command from one of these directories
and it isn't finding it.  Therefore, you need to copy those files
to YOUR directories.  Return to Step 4 and try it again.  Should
all go well, you are set.  The program is ready to play!  If it
fails again for the same reason, try doing step 5.  Should it
still fail, there is one more thing to try.

     Step 7 - If you have tried everything and are still getting
a requester saying INSERT <name> INTO DRIVE DF0: (it is the DF0:
that is important) then the device is hard coded into the program
and an assign isn't going to take care of that.  The program code
will HAVE to be changed.  You must use a HEX editor to change all
occurrences of DF0 inside the program to something like NNN or JJJ
or something other than a device name.  Then, use the ASSIGN
command as listed above:

     ASSIGN NNN: <path>

     There is a great program called KILLDFX from the MAVERICK
copier disk.  It is hard to find, but it does exactly what we
just described automatically.

     Well, there you have it.  The Amiga in a nutshell.  I hope
that you have all gotten at least SOMETHING out of this guide and
will continue to expand your knowledge with time and practice.
There are several sources of knowledge that you can tap into.
Here is a few of them:

     o An Amiga User's Group.  Locate these guys by hanging out
in your nearest Amiga dealer shop or asking them if there is a
support group.  The guys in the shop can probably tell you
exactly where to go.

     o Your local Amiga BBS can help, too.  If you cannot find
one local (again, talk to your dealer), try calling a pay service
like GEnie or Compuserve and getting information there.  You can
also call the Dark Unicorn Productions support BBS (Secret
Service BBS) at [phone] and there are lots of people on
line there that can help you out.

     o Get a copy of Amiga World or Amazing Amiga and order some
self-help books on AmigaDOS or other specialty programs for the
Amiga.  There are also tutorial disks for AmigaDOS, DPaint IV,
and many others that work in conjunction with the program and
offer you help whenever you need it.  Many back issues of AW or
AA also will have tutorials and help columns.  See if you can
find some back issues at your local library.

     Remember, have fun and feel free to experiment.  Lots of
this information was obtained through experimentation.  Enjoy the
best computer ever made!