Meeting Pearls 1/Meeting Pearls Vol 1 (1994).iso/installed_progs/text/faqs/macintosh.hardware-faq

Internet Message Format | 1994-05-04 | 96.6 KB

Subject: Macintosh hardware frequently asked questions (FAQ)
Newsgroups: comp.sys.mac.hardware,comp.answers,news.answers
From: [e-mail] (Elliotte Rusty Harold)
Date: 3 May 1994 10:43:36 GMT

Archive-name: macintosh/hardware-faq
Version: 2.2.0
Last-modified: April 17, 1994

Frequently Asked Questions about Macintosh Hardware
===================================================


                  comp.sys.mac.faq, part six:
                  comp.sys.mac.hardware
                  Copyright 1994 by Elliotte Harold
                  Archive-name:  macintosh/hardware-faq
                  Version:       2.2.0
                  Last-modified: April 17, 1994



                         Table of Contents
==================================================================

I.   Maintenance
      1.  How do I clean a keyboard?
      2.  How do I clean a screen?
      3.  How do I clean a mouse?
      4.  How do I clean a floppy drive?
      5.  How do I clean the inside of my mac?
II.  Problems And Repairs
      1.  How do I open a compact Mac?
      2.  Now that I've opened my Mac how might I electrocute myself?
      3.  Where can I get my Mac fixed?
      4.  Can you recommend any good books about Mac repair?
      5.  The screen on my compact Mac is jittering.
III. Upgrades
      1.  What Macs will be upgradeable to the PowerPC?
      2.  Can I increase the speed of my Mac by accelerating the clock?
      3.  Can I add an FPU to my Mac?
      4.  Can I replace the 68LC040 with a 68040?
IV.  Thanks for the Memory
      1.  What kind of memory should I use in my Mac?
      2.  Can I use PC SIMM's in my Mac?
      3.  What vendors have good prices on memory?
      4.  Do SIMMdoublers work?
V.   Video
      1.  What's VRAM?
      2.  All monitors are not created equal.
      3.  There's a horizontal line across my monitor.
VI.  Floppy Disks
      1.  What kind of floppy disks do I need for my Mac?
      2.  Why can't my Quadra (SE/30, Iici, etc.) read the disks from my Plus?
      3.  Does punching a hole in a double-density disk make a high-density disk?
VII.  SCSI Troubles
      1.  How do I put my old internal hard disk in an external case?
      2.  What's the cheapest/fastest/most reliable/most common removable drive?
      3.  What's the best CD-ROM drive?
VIII. Printers
      1. What's a good printer?
IX.   Miscellaneous hardware FAQ's
      1. What power adaptor do I need to use my mac in another country?
      2. How can I fix the sound on my IIsi?
A.    Models


ADMINISTRIVIA
=============

Copyright
---------

       This work is Copyright 1994 by Elliotte M. Harold.  Permission
  is hereby granted to transmit and store this document as part of an
  unedited collection of any newsgroup to which it is posted by myself.
  I also grant permission to distribute unmodified copies of this
  document on-line via bulletin boards, on-line services, and other
  providers of electronic communications if no fees in
  excess of normal online charges are required for such distribution;
  I.e., if the FAQ is available on a system, it must be available at
  the minimum charge for accessing the system.  For instance you may
  post it to most BBS's that charge either a flat monthly fee or a
  per hour rate.  However, if there is an extra charge for downloading
  files over what is charged per normal access, either per hour, per
  kilobyte, or per month, then the FAQ may not be posted to that
  system without my explicit, prior permission.  Portions of this
  document may be extracted and quoted free of charge and without
  necessity of citation in normal online communication provided
  only that said quotes are not represented as the correspondent's
  original work.  Permission for quotation of this document in
  edited, online communication (such as the Info-Mac Digest and
  TidBITS) is given subject to normal citation procedures (i.e., you
  have to say where you got it).  If you wish to republish this FAQ
  in a modified form, in a non-electronic medium or on disk, CD-ROM or
  storage media please contact me with specific details.  I'm normally
  receptive to non-profits that wish to redistribute it at no charge,
  and to anyone who is willing to make reasonable remunerative
  arrangements for non-exclusive republication rights.



How to Get the Entire FAQ
-------------------------

       The file you are reading now contains only hardware
  information. This is the SIXTH part of this FAQ.  Many other topics
  of interest to comp.sys.mac.hardware readers are covered in other
  FAQ lists in the Macintosh newsgroups. The first part of this
  document is also posted to this newsgroup under the subject heading
   "Introductory Macintosh frequently asked questions (FAQ)" and
  includes a complete table of contents for the entire document as
  well as information on where to post, ftp, file decompression,
  trouble-shooting, and preventive maintenance.  The second part is
  posted to comp.sys.mac.system and features many questions about
  system software.  The third part is posted to comp.sys.mac.misc,
  the fourth to comp.sys.mac.apps and the fifth part to
  comp.sys.mac.wanted.  All answer many questions that often
  erroneously appear in comp.sys.mac.hardware.  Please familiarize
  yourself with all five sections of this document before posting.

       All pieces are available for anonymous ftp from rtfm.mit.edu
  [18.70.0.209] in the directory pub/usenet/news.answers/macintosh.
  Except for the introductory FAQ which appears in multiple newsgroups
  and is stored as general-faq, the name of each file has the format
  of the last part of the group name followed by "-faq", e.g the
  FAQ for comp.sys.mac.system is stored as system-faq and the FAQ
  for comp.sys.mac.misc is stored as misc-faq.  You can also
  have these files mailed to you by sending an E-mail message
  to [e-mail] with the line:
       send pub/usenet/news.answers/macintosh/"name"
  in the body text where "name" is the name of the file you want as
  specified above (e.g. general-faq).  Send this server a message
  with the subject "help" for more detailed instructions.



==================
MAINTENANCE  (1.0)
==================

       First a word about tools: many basic household items will
  serve you well when taking care of a Mac but not all.  Under no
  circumstances should you use a Dustbuster or other common handvac to
  clean electronic equipment.  Instead you need a specially designed
  vacuum cleaner with a conducting, grounded nozzle.  These normally
  cost about $40 in electronics supply stores.  Most paper towels are
  adequate for cleaning computer equipment.  However Scott brand
  towels do have lower rag content than any other commonly available
  towel and are less likely to leave paper fibers behind on your
  equipment.


HOW DO I CLEAN A KEYBOARD?  (1.1)
---------------------------------

       For basic cleaning a little isopropyl (rubbing) alcohol on a
  Scott towel works well.  Common household cleaners like Formula 409
  also do a nice job.  To perform a more thorough cleaning you'll need
  to take the keyboard apart.  Depending on the type of keyboard
  you'll need one or more of a Phillips head screwdriver, a Torx T-15
  screwdriver, and a special tool almost impossible to find when you
  really really need it which goes by the technical name of "key
  puller."  Disassemble the keyboard, pull off all the keys, and use a
  can of compressed air or an electronics vac to clean out all the
  dust bunnies that have mated and grown and had children and mated
  again and built apartment complexes and shopping malls inside your
  keyboard.  (I don't know why, but keyboards attract far more
  detritus than any other computer component.)  Finally if you spilled
  Mountain Dew, coffee or some other liquid substance into the
  keyboard, clean it with lukewarm water and a soft towel.  Use
  isopropyl alcohol on any remaining sticky spots.


HOW DO I CLEAN A SCREEN?  (1.2)
-------------------------------

       First turn off the monitor.  Spray a small amount of Windex or
  any other common glass cleaner onto a paper towel, NOT directly onto
  the screen.  Then wipe the paper towel over the screen.  Finally
  wipe the screen clean with a dry paper towel.


HOW DO I CLEAN A MOUSE?  (1.3)
------------------------------

       Poor mouse tracking is normally a sign of dirty contacts.  To
  clean them get a cassette tape head cleaning solution from any audio
  store.  Turn off the Mac.  Then unplug the mouse.  The bottom plate
  of the mouse that holds the ball in place can be removed by pushing
  down and twisting (like a child-proof medicine cap).  The ball will
  probably fall out when the plate is removed so be ready to catch it.
  There's nothing quite so annoying as having to crawl around on the
  floor looking under the furniture for a mouse ball.  Dip a cotton
  swab in the solution.  Then rub it on the three ball contacts until
  they appear clean to the eye.  Finally clean the ball itself with
  soap and water and dry it with a paper towel.


HOW DO I CLEAN A FLOPPY DRIVE?  (1.4)
-------------------------------------

       Normally you don't need to.  Several companies sell floppy
  drive cleaning kits that consist of nothing more than a disk and
  some cleaning fluid for anywhere from five to twenty-five dollars.
  These are almost as pointless as the CD cleaning kits sold to
  overenthusiastic CD owners.  I'd only use one of these if I was
  already experiencing problems that were identifiably linked to the
  floppy drive rather than individual disks.  Cleaning a floppy drive
  should not be part of normal maintenance.  When you do need to clean
  a floppy drive, Apple recommends the 3M floppy drive cleaning kit.

       If you have a vacuum cleaner designed for electronic equipment,
  you can always run it across the floppy slit, but even that is
  rarely necessary.  Or you can disassemble the Mac and use a can of
  compressed air to blow the dust out of the floppy drive.  Don't do
  this without disassembling the Mac first though since otherwise
  you'll just blow dust deeper inside your computer.  And even when
  the Mac is taken apart, be careful to blow the air AWAY from the
  motor.  If you blow air into the drive motor, you'll forcing dust
  into it and make the drive more likely to fail.


HOW DO I CLEAN THE INSIDE OF MY MAC?  (1.5)
-------------------------------------------

       I don't advise taking a Mac apart just to clean it; but if
  you've already dismantled it as part of another upgrade or repair,
  blowing accumulated dust away with a can of compressed air won't
  hurt.  You can also use a specially designed computer vacuum
  cleaner, but don't use a normal hand vac like a Dustbuster as
  there's a small chance of damage to your Mac from the static
  electricity it builds up.

       On the other hand if during one of those late night football
  games through the halls of your office someone drop-kicked a
  half-full can of Mountain Dew straight through the uprights of your
  cubicle onto your Mac (or if you've spilled a soda or some other
  messy substance into the Mac in some less creative fashion), you
  will need to clean it out.  Unplug the Mac and let it sit for at
  least an hour.  It is essential to give all the parts of your Mac
  time to discharge since you'll be cleaning it with water.  Take the
  Mac apart as described in the next section.  Then clean it with
  lukewarm tap water.  Use a soft toothbrush to clean anything that
  doesn't come off with water alone.  Let the disassembled Mac air dry
  for a couple of days, (Don't even think about using a hair dryer.)
  and then put it back together.



===========================
PROBLEMS AND REPAIRS  (2.0)
===========================

HOW DO I OPEN A COMPACT MAC?  (2.1)
-----------------------------------

       You need a Torx T-15 screwdriver, at least eight inches long,
  available from any decent electronics supply shop, and a special
  tool referred to as a "Mac Cracker."  (In a pinch you can use a
  spring loaded paper clip or even a three-sided ruler.)   Before
  starting clear off a large, flat work area and get an ash tray,
  glass, or other container to hold the various small screws you need
  to remove.

       First disconnect all cables, most especially the power cable.
  For maximum safety you should only work on your Mac after it's been
  turned off for an hour so that various high-voltage capacitors have
  had time to fully discharge.  Lay the Mac face down on a soft towel
  in your work space.  If you're working on a Plus or earlier Mac
  remove the battery cover and battery.  Then unscrew all the screws
  with the T-15 screwdriver.  There are four of them on SE's and
  Classics, two hidden inside the handle and two above the ports on
  the bottom of the Mac.  The Plus and earlier Macs have five screws
  including one under the battery cover.  After the screws are
  removed, wedge the cracking tool into the seam and pry the two
  pieces of the case apart.  Then carefully lift the back cover off
  and place it down in your work space.  Finally inside you'll find a
  metallic RF shield covering the ports which can easily be removed.


NOW THAT I'VE OPENED MY MAC HOW MIGHT I ELECTROCUTE MYSELF?  (2.2)
------------------------------------------------------------------

       Like most computers a Macintosh contains lots of exciting
  high voltage equipment that can deliver shocks ranging from mildly
  surprising to motherboard-frying to lethal.  Since compact Macs cram
  the high voltage picture tube and power supply into the same cramped
  space shared with the motherboard, they're particularly dangerous.
  If you're intent on committing computer-assisted suicide, here
  are a few simple procedures that will greatly enhance your chance
  of success:

* Be sure the computer and all cables are plugged in when you
  work on it.  It's difficult (though not impossible) to get a good,
  solid shock without at least 120 volts of AC surging through the
  works.

* Wear lots of metal jewelry.  Long, dangling gold bracelets make
  the most effective unexpected electrical contact between the picture
  tube and your heart.

* Naturally you yourself want to be nice and clean before working
  on your Mac so take a long shower.  Don't bother to dry off though.
  The heat from your Mac should dry you just fine.

* Pay special attention to the picture tube and flyback
  transformer.  Fondle them.  Know them.  Love them.  If you're still
  conscious take apart the power supply.  (That's the silver box with
  the big red warning letters on it.)

* Invite all your pets and small children to watch you work.
  However there's no reason to invite an adult who might have the
  presence of mind to call 911 should you be injured.


WHERE CAN I GET MY MAC FIXED?  (2.3)
------------------------------------

       If it's been less than a year since you bought the Mac, then
  by all means bring it to a local Apple authorized dealer to get it
  fixed under warranty for free.  Not all dealers are created equal,
  and you don't have to get your Mac repaired by the same dealer you
  bought it from.  Ask around locally to find out which one has the
  best reputation for fast, dependable, hassle-free service.

       After the warranty has expired an Apple dealer is generally not
  the best (and certainly not the cheapest) place to have your Mac
  fixed.  A typical Apple authorized repair consists of swapping out
  the entire malfunctioning subsystem.  It's not at all uncommon for
  Apple dealers to repair small problems by motherboard swaps that
  cost almost as much or even more than a new Mac.  For out of
  warranty repairs your best bet is an unauthorized repair shop that
  specializes in component level repairs.  Be sure to find one that
  specializes in Macintosh repairs, not a PC shop that does Macs
  on the side.  Again seek advice from local bulletin boards and
  user groups.

       If there are no reliable local repair shops, a number of
  mail-order repair shops advertise in the back pages of MacUser and
  MacWorld.  Personally I find it horribly inconvenient to package and
  ship a Mac just to get a flyback transformer replaced, but most of
  these shops do offer reliable repairs at very competitive prices
  and many people on the net swear by one or another.


CAN YOU RECOMMEND ANY GOOD BOOKS ABOUT MAC REPAIR?  (2.4)
---------------------------------------------------------

       Larry Pina has written several excellent guides to repairing
  Macs.  Mac Classic & SE Repair and Upgrade Secrets (Peachpit Press,
  $28, ISBN #1-56609-022-9) covers the SE, SE/30, Classic, and Classic
  II.  This volume offers moderately detailed instructions for someone
  with prior electronics experience to diagnose common problems, do
  component level repairs and perform upgrades on compact Macs.
  Macintosh Repair and Upgrade Secrets (Hayden Books $24.95, ISBN
  #0-672-48452-8) is an earlier version of this book which covers
  compact Macs from the 128K to the SE and the Lisa.  Pina's sequel,
  Macintosh II Repair and Upgrade secrets, $39.95, ISBN
  #0-13-929530-5, offers similar coverage of the Mac II family of
  Machines.  All these books include valuable diagnostic software
  on a bundled disk.  Before delving into this volume you should
  be comfortable wielding a soldering iron on expensive equipment.
  Finally he's also written the somewhat less technical and more
  detailed Dead Mac Scrolls (PeachPit Press, ISBN #0-940235-25-0, $32)
  which offers symptom-based procedures for diagnosing and repairing
  many common problems.  This book includes good advice about how to
  find and deal with a repair shop.  All four books deserve a place
  in the library of anyone who intends to wield a soldering iron on
  their Mac.


THE SCREEN ON MY COMPACT MAC IS JITTERING.  (2.5)
-------------------------------------------------

       Nine times out of ten this is a symptom of a failing flyback
  transformer.  It may be accompanied by high-pitched whines and even
  the smell of burnt ozone.  This is a warning that the demise of the
  Mac is imminent!  Turn it off and don't use it again till the video
  is fixed.  If the flyback transformer is in this bad a shape,
  chances are that other components either already have failed or
  soon will.  However many expensive parts of the video subsystem are
  probably working just fine so this is one common problem that can
  often be fixed much more cheaply by a component-level repair shop
  than by an authorized dealer who'll likely swap out the entire
  video board.


===============
UPGRADES  (3.0)
===============

WHAT MACS WILL BE UPGRADEABLE TO THE POWERPC?  (3.1)
----------------------------------------------------

       Apple will provide logic board replacements for all Centris,
  Quadra and WorkGroup Server models except the Quadra 700, 900 and
  950.  There should also be logic board replacements for the IIvx,
  IIvi, LC 475, 520, 550, and 575, Performa 475, 476, 550, and 600.
  Upgraded AV Macs will lose their special video capabilities, at
  least initially.  Apple will also make available PowerPC processor
  upgrade boards that fit into the PDS slots of the Quadra 605, 610,
  650, 700, 800, 900, and 950 as well as the Centris 610 and 650 and
  the Performa 475 and 476.  Macs upgraded via a PDS card run at twice
  the speed of the system clock.  Thus a 25 MHz 68040 Mac with a PDS
  accelerator will become a 50 MHz PowerMac.  You'll be able to
  disable the accelerator if you have old software that's not PowerPC
  compatible or that just plain runs faster on the older hardware.
  68030 desktop Macs with expansion slots will be upgradeable via
  third party accelerator cards.  It is not yet known whether any
  upgrade will be available for Powerbooks.


CAN I INCREASE THE SPEED OF MY MAC BY ACCELERATING THE CLOCK?  (3.2)
--------------------------------------------------------------------

       Apple engineers designed the Mac IIsi to run at 25 megahertz.
  Apple marketeers made them reduce the speed by 20% so as not to hurt
  sales of the IIci.  Thus with various caveats it is generally safe
  to accelerate a IIsi to 25 Mhz by changing the clock chip.  All
  other Mac models were designed to run at the speeds they normally
  run at so "clock-chipping" them is a much iffier proposition.
  Compact Macs, PowerBooks and the Mac II, IIx and IIcx as well as
  the LC and LC II use the same oscillator to time various external
  circuitry as they use to time the CPU so they almost never work if
  the clock chip is replaced.  Most other Macs seem to work for at
  least a while when sped up by as much as twenty percent.  Somewhere
  beyond a twenty percent increase in clock speed most Macs experience
  serial port problems though the exact level of safe increase varies
  from Mac to Mac even within the same model and configuration.  Other
  problems may surface over time as the extra heat generated by the
  faster speed increases the wear and tear on the insides of the Mac.

       Performing this upgrade is not for the faint of heart.  It is
  quite complex and requires soldering, replacement of several parts,
  and other non-trivial procedures.  If done improperly it can result
  in major, expensive damage to your Mac.  I am not going to give
  detailed instructions for doing this here.  If you do want to do
  this yourself, several text files are available at the usual ftp
  sites that outline the procedure.  For people who are willing to
  open their Mac and swap out RAM or a hard drive but don't feel
  comfortable soldering on their motherboard, KS Labs, [phone],
  offers $165 kits that more safely (no soldering) accelerate the
  clock.  These kits include a clip-on oscillator plus a heat sink
  and fan to keep the faster circuitry cool.


CAN I ADD AN FPU TO MY MAC?  CAN I REPLACE THE 68LC040 WITH A 68040? (3.3)
--------------------------------------------------------------------------

       All 68020 and 68030 Macs that did not ship with an FPU
  standard (i.e. the IIsi and LC series) have special slots that can
  accommodate an FPU card.  All Macs that have the FPUless 680LC40
  CPU run just fine if that chip is replaced with a full 68040 that
  includes an FPU.  All PowerPC Macs include an integrated FPU.  There
  is no way to add only an FPU to a 68000 Mac like an SE though some
  third party acclerators do include FPU's as well as faster CPU's.



============================
THANKS FOR THE MEMORY  (4.0)
============================

WHAT KIND OF MEMORY SHOULD I USE IN MY MAC?  (4.1)
--------------------------------------------------

       The easiest way to get this question answered is to ask your
  friendly, mail-order memory dealer.  If you tell them what model of
  Mac you have, what memory you already have in your Mac, and how much
  you want to add, they should be able to tell you exactly what you
  need.  Memory comes in many configurations.  All desktop Macs from
  the Plus through the Quadra 700, 900, and 950 use 70 pin SIMMs that
  normally need to be added four at a time (except in the SE, the Plus
  and the Classics where they're added two at a time).  Later Quadras,
  the LC III, and the Centris's use 72 pin SIMMs that can be added one
  SIMM at a time.  PowerMacs also use 72 pin SIMMs but need  them
  installed in pairs.  All portable Macs (PowerBooks, Duos, and the
  Portable) have one RAM slot to hold a special card with extra RAM.

       The chart below gives details for each model of Mac.  For each
  model it lists how much RAM is soldered to the motherboard, how many
  slots are available to hold more RAM, what size memory is available
  for those slots, different possible RAM configurations, what type of
  memory is used (30 pin SIMM, 72 pin SIMM, or card type,) the minimum
  speed of the RAM you should use in that model, and how many SIMMs or
  cards need to be replaced or added at the same time.


                              Available  Physical RAM       Minimum Upgrade
     CPU     Onboard  Slots    Sizes    Configs (MB)   Pins  Speed    in
 __________  _______  _____  _________  _____________  ____  _____  _____
 Plus           0       4    256K,1M    1,2.5,4         30   150ns    2
 SE             0       4    256K,1M    1,2,2.5,4       30   150ns    2
 SE/30          0       8    256K,1M    1,2,4,5,8,16    30   120ns    4
                             4M,16M     17,20,32,64
                                        65,68,80,128
 Classic        1       3    256K,1M    1,2,2.5,4       30   120ns    2
 Classic II     2       2    1M,2M,4M   2,4,6,10        30   120ns    2
 Color Classic  4       2    1M,2M,4M   4,6,8,10        30   120ns    2
 Mac II         0       8    256K,1M    1,2,4,5,8,17    30   120ns    4
                             4M,8M,16M  20,33,36,65,68
 Mac IIx        0       8    256K,1M    1,2,4,5,8,16,17 30   120ns    4
                             4M,8M,16M  20,32,33,36,64
                                        65,68,80,96,128
 Mac IIcx       0       8    256K,1M    1,2,4,5,8,16,17 30   120ns    4
                             4M,8M,16M  20,32,33,36,64
                                        65,68,80,96,128
 Mac IIci       0       8    256K,512K  1,2,3,4,5,6,8   30   80ns     4
                             1M,4M,8M   16,17,18,20,32
                             16M        33,34,36,64,65
                                        66,68,80,96,128
 Mac IIsi       1       4    256K,512K  1,2,3,5,17,33   30   80ns     4
                             1M,4M,8M   65
                             16M
 Mac IIvi       4       4    256K,512K  4,5,6,8,20,36   30   80ns     4
                             1M,4M,8M   36,68
                             16M
 Mac IIvx       4       4    256K,512K  4,5,6,8,20,36   30   80ns     4
 (Performa 600)              1M,4M,8M   36,68
                             16M
 Mac IIfx       0       8    1M,4M,16M  4,8,16,20,32    30   80ns     4
                                        64,68,80,128
 LC             2       2    1M,2M,4M   2,4,6,8,10      30   120ns    2
 LC II          4       2    1M,2M,4M   4,6,8,10        30   120ns    2
 LC III         4       1    1M,2M,4M   4,5,6,8,12,36   72   80ns     1
                             8M,16M,32M
 LC 520         4       1    1M,2M,4M   4,5,6,8,12,36   72   80ns     1
                             8M,16M,32MM
 LC 550         4       1    1M,2M,4M   4,5,6,8,12,36   72   80ns     1
                             8M,16M,32MM
 LC 575         4       1    1M,2M,4M   4,5,6,8,12,36   72   80ns     1
                             8M,16M,32MM
 Centris 610    4       2    4M,8M,16M  4,8,12,16,20,24 72   80ns     1
                             32M        28,36,52,68
 Centris 650    8       4    4M,8M,16M  8,12,16,20,24   72   80ns     1
                             32M        32,40,68,72,132
 Centris 660av  4       2    4M,8M,16M  4,8,12,16,20,24 72   70ns     1
                             32M        28,36,52,68
 Quadra 605     4       1    4M,8M,16M  4,8,12,20,36    72   80ns     1
                             32M
 Quadra 610     4       2    4M,8M,16M  4,8,12,16,20,24 72   80ns     1
                             32M        28,36,52,68
 Quadra 650     8       4    4M,8M,16M  8,12,16,20,24   72   80ns     1
                             32M        32,40,68,72,132
 Quadra 660av   4       2    4M,8M,16M  4,8,12,16,20,24 72   70ns     1
                             32M        28,36,52,68
 Quadra 700     4       4    1M,4M,16M  4,8,20,68       30   80ns     4
 Quadra 800     8       4    4M,8M,16M  8,12,16,20,24   72   60ns     1
                             32M        28,32,36,40,44
                                        48,52,56,60,64
                                        68,72,80,84,88
                                        104,108,112,120,132
 Quadra 840av   0       4    4M,8M,16M  8,12,16,20,24   72   60ns     1
                             32M        28,32,36,40,44,48,52,56
                                        60,64,68,72,76,80,84,88
                                        96,100,104,112,128
 Quadra 900     0       16   1M,4M,16M  4,8,12,16,20    30   80ns     4
                                        24,28,32,36,40,48,52,64
                                        64,68,72,76,80,84,88,96
                                        100,112,128,132,136,144
                                        148,160,192,196,208,256
 Quadra 950     0       16   1M,4M,16M  4,8,12,16,20    30   80ns     4
                                        24,28,32,36,40,48,52,64
                                        64,68,72,76,80,84,88,96
                                        100,112,128,132,136,144
                                        148,160,192,196,208,256
 PowerMac 6100  8       2    4M,8M,16M  8,16,24,40,68   72   80ns     2
                             32M
 PowerMac 7100  8       4    4M,8M,16M  8,16,24,32,40   72   80ns     2
                             32M        48,56,72,80,88
                                        104,132
 PowerMac 8100  8       8    4M,8M,16M  8,16,24,32,40   72   80ns     2
                             32M        48,56,64,72,80,88
                                        96,104,112,120,128
                                        136,144,152,160,168
                                        176,184,208,216,232,264
 Portable       1       1    1M,2M,3M,4M 1,2,3,4,5          100ns     1
 PowerBook 100  2       1    2M,4M,6M    2,4,6,8       TSOP 100ns     1
 PowerBook 140  2       1    2M,4M,6M    2,4,6,8       TSOP 100ns     1
 PowerBook 145  2       1    2M,4M,6M    2,4,6,8       TSOP 100ns     1
 PowerBook 145b 4       1    2M,4M       4,6,8         TSOP 100ns     1
 PowerBook 160  4       1    4M,6M,8M    4,8,10,12     TSOP  85ns     1
                             10M         14
 PowerBook 165c 4       1    4M,6M,8M    4,8,10,12     TSOP  85ns     1
                             10M         14
 PowerBook 170  2       1    2M,4M,6M    2,4,6,8       TSOP 100ns     1
 PowerBook 180  4       1    4M,6M,8M    4,8,10,12     TSOP  85ns     1
                             10M         14
 PowerBook 180c 4       1    4M,6M,8M    4,8,10,12     TSOP  85ns     1
                             10M         14
 Duo 210        4       1    4M,8M,10M   4,8,12,14,16        85ns     1
                             12M,14M     18,24,32
                             20M,28M
 Duo 230        4       1    4M,8M,10M   4,8,12,14,16        85ns     1
                             12M,14M     18,24,32
                             20M,28M
 Duo 250        4       1    4M,8M,10M   4,8,12,14,16        85ns     1
                             12M,14M     18,24,32
                             20M,28M
 Duo 270c       4       1    4M,8M,10M   4,8,12,14,16        85ns     1
                             12M,14M     18,24,32
                             20M,28M

    The Mac Classic requires an adapter card to expand the RAM from
  1 MB.  This card includes 1 MB of extra memory and has two SIMM
  slots that can either be left empty or filled with 256K or 1MB
  SIMMs.  The slots must be filled with the same size SIMM.

       The Color Classic, LC, and LC II can only address 10 megabytes
  of real RAM even if twelve megabytes of physical RAM are installed.

       The Mac II requires the addition of a PMMU chip to access more
  than eight megs of RAM.  The first bank can only hold 256K or 1MB
  SIMMs unless the FDHD upgrade is installed.  Otherwise 4, 8, and 16
  MB SIMMs have to be installed in Bank B.  Furthermore these SIMMs
  need an extra PAL chip on each SIMM as well as the normal eight DRAM
  chips.

       The Quadra 700 requires non-composite, low-profile 16 megabyte
  SIMMs to fit under the internal hard drive.  Composite SIMMs should
  also not be used on 68040 AV Macs as they are practically guaranteed
  to cause problems with the system due to the extra load and timing
  required.  Specifically you need to avoid 16MB SIMMs that use 32
  4M-bit DRAMs rather than 8 16M-bit DRAMs.

       PowerBooks use pseudo-static thin small-outline package cards
  (TSOP's) of varying capacities.  Duo's use special low-power,
  self-refreshing dynamic RAM cards.  Be sure to specify the model
  you're ordering for when buying PowerBook RAM.


CAN I USE PC SIMM'S IN MY MAC?  (4.2)
-----------------------------------------

       Yes.  Nine chip PC and SUN workstation SIMM's work perfectly
  well in any desktop Mac that can use the equivalent eight chip
  Macintosh SIMM's; e.g. a IIci works with 1x9, 4x9, or 16x9 PC 80 ns
  PC SIMMs just as it does with  1x8, 4x8, or 16x8 80ns Mac SIMMs.
  The extra chip on each SIMM provides a  brain dead type of error
  correction known as parity checking.  It is unused on the Mac.
  Since PC SIMM's are manufactured in higher volume than Mac SIMM's,
  they are often cheaper despite the extra chip per SIMM.  They're
  also easier to resell.


WHAT VENDORS HAVE GOOD PRICES ON MEMORY?  (4.3)
-----------------------------------------------

       You should certainly shop around, but I've found that the Chip
  Merchant, 800-426-6375 (orders), 619-268-4774 (info), consistently
  has the lowest prices, excellent service and a knowledgeable sales
  staff.


DO SIMMDOUBLERS WORK?  (4.4)
----------------------------

       Sometimes.  Problems have been reported so make sure you get a
  money-back guarantee before ordering.  MicroMac's SIMMdoubler II
  will double the SIMM capacity of all Mac II models and the Performa
  600; i.e. it lets you fit two SIMMs in each slot on your logic
  board.  It also lets you use standard 4x8 SIMMs in the Mac II and
  IIx rather than the more expensive PAL type normally required.  At
  $140 street a set of four is a little expensive but perhaps worth
  it if you have a let of extra one meg SIMMs.  Sermak Technology's
  (800-209-7126) SimmStacks will fit two 30 pin SIMMs in one 72 pin
  slot.  Sermak also sells SIMM doublers that fit two 72 pin SIMMs
  in one 72-pin slot.

       Since the extra height of the SIMMdoubler provides more
  leverage to exert force on the SIMM sockets, some users have
  broken SIMM slots when installing these products so be careful.
  Furthermore if you use more SIMMs than you have sockets, you'll be
  drawing more power into them than your Mac was designed to supply
  which might lead to problems down the road.



============
VIDEO  (5.0)
============

WHAT'S VRAM?  (5.1)
-------------------

       Video RAM is where the computer stores the images displayed on
  your screen.  On some earlier Macs with built-in video (Mac 128,
  IIci) this was kept in main memory.  However it's considerably more
  efficient and faster to store the screen image in its own separate
  RAM.  Generally the more VRAM you have the more colors or shades of
  gray you can display and the larger the monitors you can use.  The
  chart below shows the number of colors that can be displayed at a
  given resolution with the specified amount of VRAM.  Monitor size
  has no direct relation to the amount of VRAM required though larger
  monitors normally support higher resolutions.  Larger monitors
  just have fewer dots per inch than smaller monitors with the same
  resolution.  Also note that simply because a particular video card
  or Mac has sufficient VRAM to support a given number of colors
  doesn't mean that it actually can though more modern cards and
  monitors typically do support several resolutions.

Resolution   512x342    640x480    832x624    1024x768    1152x870    1280x1024
VRAM
256K           256         16         16
512K          32768       256        256         16           16
768K          32768      32768       256         256          16          16
1024K       16777216   16777216      32768       256          256         16
2048K       16777216   16777216   16777216      32768        32768        256


ALL MONITORS ARE NOT CREATED EQUAL.  (5.2)
------------------------------------------

    Choosing a monitor used to be simple.  Like the Model-T Ford
  you could have any color you wanted as long as it was black (and
  white), 9", 512 by 342 pixels, 72 dpi. The PC drones made fun of the
  small size and lack of color, but it was obvious to any unprejudiced
  person who looked at a Macintosh that its display was far superior
  to the CGA and EGA monitors being foisted on ignorant PC consumers.
  Mac monitors are no longer so simple.  Now one needs to be concerned
  with such arcana as resolution, size, bit depth, dot pitch, and
  refresh rate.

       Size is the most obvious characteristic of a monitor.  It's
  measured diagonally from one corner of the screen to the opposite
  corner.  Actual monitor area is roughly proportional to the square
  of the diagonal length so a twenty-inch monitor is more than four
  times as large as a nine-inch monitor.  Most manufacturers cheat on
  their monitor sizes by measuring from one corner of the screen (or
  even the case) to the other rather than from one edge of the visible
  display to the other.  Then they round up to the nearest inch with
  the result that most "fourteen-inch monitors" are closer to twelve
  and a half inches when measured truthfully.  For many years Apple
  was one of the more honest manufacturers, advertising it's twelve
  and a half inch monitor as a thirteen inch monitor while other
  manufacturers touted their "larger fourteen-inch" twelve and a half
  inch monitors.  However Apple has succumbed to the pressures of the
  market, and like everyone else it now advertises twelve and a half
  inch monitors as "fourteen inch displays."

       Of course it's not the size that matters; it's how you use it.
  Resolution defines how much information can be squeezed onto the
  screen.  Most monitors sold today are "multi-sync"; that is they
  are capable of displaying more than one resolution.  A fifteen inch
  monitor at 1024 by 768 pixels displays two and a half times as much
  information as the same monitor at 640 by 480 pixels.  However
  everything will appear smaller at the larger resolution since the
  monitor has to fit more pixels into the same space.  The clearest
  resolution for a monitor is whatever comes closest to fitting 72
  pixels (or dots) into each inch.  This is the dpi rating of the
  monitor.  72 dpi is the proper "WYSIWIG" (Pronounced Whizzy-wig,
  What you see is what you get.) resolution though some people prefer
  to work at a higher resolution that fits more information on the
  screen.

       Resolution and bit depth define how much you can see on your
  screen.  Dot pitch defines how well you can see it.  It's the
  size of each individual pixel.  Larger dot pitches look fuzzier.
  Trinitron monitors paint the picture in lines rather than dots so
  this doesn't really apply to them.  However the "line stripe" of a
  Trinitron display means virtually the same thing in practice as dot
  pitch does for other monitors, and most salesmen and copywriters are
  quite happy to confuse the two for you.  Most monitors have dot
  pitches of .39 mm, .29 mm, or .25 mm.  The larger the dot pitch the
  fuzzier your screen looks.  .39 mm dot pitch monitors (the standard
  in the PC world) look bad.  .29 mm dot pitch monitors are acceptable
  for all but the most demanding users.  .25 mm is the best dot pitch
  available with current technology.

       Refresh rate also affects how clear the picture appears.  72 Hz
  is the standard refresh rate for Mac monitors.  That means the screen
  is repainted 72 times a second, more than twice as fast as your
  TV screen.  A few monitors even repaint at an 80 Hz refresh rate
  though I suspect that's overkill for all but the most sensitive
  eyes.  However many cheaper PC monitors have refresh rates of 60 Hz
  or even less.  This begins to reach the level that contributes to
  eyestrain.  Worse yet these monitors are interlaced, which means
  that only half of the screen is redrawn on each pass.  Interlaced
  monitors have a visible flicker effect, and should be avoided at all
  costs.  Leave them on the shelves for the deluded PC users who think
  saving $50 on a monitor is worth spending $500 at the optometrist.

       Most Mac monitors are at least 69 dpi, 0.29 mm dot pitch with
  refresh rates of 72 Hz.  This is acceptable for most work.  The
  only common exception is the Apple Basic Color Monitor.  This was
  Apple's VGA monitor for low cost systems and was laughed out of the
  marketplace.  (It's the standard in the PC world which gives you
  some idea of the lower standards on the other side of the fence.)


THERE'S A HORIZONTAL LINE ACROSS MY MONITOR.  (5.3)
---------------------------------------------------

       All Sony Trinitron monitors have a stabilizing wire in position
  to cast a shadow about three quarters of the way down the screen.
  Larger monitors also have a wire about a third of the way down from
  the top of the display.  There is no way to fix this short of
  redesigning the Trinitron tube.  This line is more obvious on some
  monitors than others so if it seems particularly bad you can try to
  convince the dealer you bought it from to exchange the monitor.
  Other than that there's nothing that can be done about it.



===================
FLOPPY DISKS  (6.0)
===================

WHAT KIND OF FLOPPY DISKS DO I NEED FOR MY MAC?  (6.1)
------------------------------------------------------

       There have been three kinds of floppy disks in the history of
  the Macintosh.  The original 128K Thin Mac (which used to be called
  a classic Mac before the advent of the much superior Mac Classic)
  and the subsequent 512K "Fat Mac" used 400K, single-sided
  double-density diskettes.  These disks are outdated, and it's highly
  unlikely you'll actually see any.  If you need to exchange data
  with an older Macintosh, you'll need to use disks formatted as
  single-sided. Since very few, if any, stores still sell one-sided
  3.5 inch disks anymore, it's fortunate that all Macs deal quite
  happily with double-sided disks formatted as single-sided.  Just
  click the button labeled "One-sided" after you select "Erase Disk"
  from the Special menu.

       *Neat Trick alert*  Sometimes disks that fail formatting as
  double-sided can be formatted as single-sided.  Even neater trick:
  In System 6 the shareware init BAD can map out bad sectors on a
  floppy disk which lets about 70% of bad disks be formatted. (System
  7 does this automatically.)  Neatest trick of all:  All name-brand
  diskettes (SONY, Maxell, etc.) come with lifetime warranties.  A lot
  of offices keep a bad disk box for everyone to dump their bad disks
  in and send the disks in for replacement when they collect ten or
  so; but it's been my experience that if you return just a single bad
  disk these companies will send a whole ten pack as a replacement.

       With the introduction of the Mac Plus in 1986, Apple also
  introduced a larger disk drive capable of reading and writing 800K,
  "Double-Sided Double-Density" disks, DSDD for short.  The only way
  to tell these disks from the earlier, one-sided diskettes, is by
  the label on the metal cover.  Unformatted these are identical to
  the 720K disks common in the IBM world.  With the Mac IIx Apple
  introduced what's alternately known as the Superdrive or "FDHD,"
  short for "Floppy Drive, High Density."  The FDHD (pronounced
  Fud-Hud) can read and write all of the previous kinds of diskettes
  plus double-sided high-density disks which are distinguished by two
  holes in the disk case rather than the normal one.  The FDHD uses
  the extra hole to recognize a high-density disk.


WHY CAN'T MY QUADRA (SE/30, IICI, ETC.) READ THE DISKS FROM MY PLUS?  (6.2)
---------------------------------------------------------------------------

       The Macintosh Plus and earlier machines along with original Mac
  II's and some SE's do not have the high density FDHD drive necessary
  to properly read and format high-density disks.  If you insert a
  blank high-density disk in a low density drive, the Mac, not knowing
  the difference between a double-density and a high-density floppy,
  will happily format your expensive 1.4 meg disk as a cheap 800K
  diskette.  When you move this disk to a more advanced machine
  with a FDHD drive, the newer drive will recognize the disk as a
  high-density floppy by its extra hole.  Since the disk has been
  formatted as 800K instead of as 1400K, the FDHD drive will try to
  read it as a 1400K disk and fail.  Then it will ask if you want to
  initialize it.  As a temporary work around place a small piece of
  tape over both sides of the extra hole on the high-density disk to
  trick the Mac into treating the disk as double-density.  This is a
  temporary fix only, and the tape should be removed and the disk
  reformatted to the proper size as soon as possible.


DOES PUNCHING A HOLE IN A DOUBLE-DENSITY DISK MAKE A HIGH-DENSITY DISK?  (6.3)
------------------------------------------------------------------------------

       Yes, but I certainly wouldn't trust any data I intended to keep
  for more than the next minute or two to such a diskette.  The extra
  hole is not the only difference between a double-density and a
  high-density disk.  The magnetic media on a high-density disk
  is a different type that is much more susceptible to formatting.
  Double-density diskettes should only be formatted as 800K.  With the
  plummeting prices of real high-density disks, this really shouldn't
  be an issue anymore.



====================
SCSI TROUBLES  (7.0)
====================

HOW DO I PUT MY OLD INTERNAL HARD DISK IN AN EXTERNAL CASE?  (7.1)
------------------------------------------------------------------

       Alliance Peripheral Systems,  800-443-4199/816-483-6100 sells
  cases for old internal 3.5 inch drives for $79.  The price includes
  instructions and technical support for the installation.


WHAT'S THE CHEAPEST/FASTEST/MOST RELIABLE/MOST COMMON REMOVABLE DRIVE? (7.2)
----------------------------------------------------------------------------

       The oldest and most established format for removable media is
  the Syquest 44 megabyte cartridge drive.  Drives are sold by many
  different vendors for about $300 and cartridges cost around $60
  each.  However this format is showing its age.  It's too small
  for a complete backup of most hard drives; the cartridges are big
  and bulky; and it's not difficult to create Photoshop, Quark, or
  PostScript files that are larger than one of these cartridges.
  Consequently most service bureaus also accept at least the Syquest
  88 format.  88 megabyte Syquest drives cost about $450 and can read
  and write but not format the older 44 megabyte cartridges.  88
  megabyte cartridges run about $90 each so they're considerably more
  cost-effective.  Although Syquest cartridges are the most commonly
  used form of removable media for Macs, they do have a reputation for
  unreliability and data corruption.  They're suitable for moving
  large files from your Mac to a service bureau, but not for making an
  important backup and certainly not for use as a second hard drive.
  I do not recommend Syquest 44 and 88 megabyte drives unless you
  must exchange disks with someone who only has a Syquest drive.

       Syquest recently introduced a new 270 megabyte drive that is
  not compatible with its more popular 44 and 88 megabyte drives
  (though it will read and write the less common Syquest 105 format).
  At only $650 for the drive and $100 per cartridge, this drive has
  the lowest cost per megabyte of any removable media.  Furthermore
  it's got the largest cartridge size so it's the easiest with which
  to perform backups.  Hard drives of 240 megabytes or less can be
  backed up to one of these monsters just by dragging the hard disk
  icon to the Syquest icon.  However since these drives are relatively
  new their reliability in production situations is still unknown.
  While the size and price of these drives are very tempting I'd still
  like to hear a few more real world experiences before I commit
  to one.

       Somewhat more proven is the Bernoulli MultiDisk 150 from
  Iomega.  Bernoulli has been making removable drives longer than
  anyone, and their drives and cartridges have a reputation for speed
  and reliability.  I would be willing to trust an important backup
  to a Bernoulli disk or to use a Bernoulli disk as a second hard
  drive.  A Bernoulli drive costs about $700 direct from Iomega
  (1-800-756-3959). 150 megabyte disks cost about $110 so the cost per
  megabyte is higher than the Syquest 270, but these drives are more
  tested in real world uses than Syquest 270s.  An additional
  advantage is that these drives also read and write Bernoulli 35, 65,
  90 and 105 megabyte cartridges so you can pick a cartridge size and
  price to fit your needs.

       Magneto-optical drives are another increasingly popular
  technology.  They're slow but very reliable.  Depending on the drive
  a cartridge can hold between 128 and 1300 megabytes.  128 megabyte
  drives cost about $800-$1000 and are available from the usual
  selection of hard drive vendors.  Next to the reliability of the
  media the biggest attraction of these drives is the extremely low
  cost per megabyte ($0.32) with 128 MB disks selling for as little
  as $40 each in quantity.  Higher capacity and higher priced optical
  drives have been introduced with capacities ranging from 256
  megabytes to 1.3 gigabytes and prices from $1800 to $5000.  Standards
  are still a little unclear and prices a little high among the higher
  capacity optical drives.  I recommend waiting a few more months before
  investing in this technology.  Regardless of standards all these
  drives are too slow to be used as a second hard disk.  Their high
  reliability and capacity makes them ideal for long-term
  backups though.

       Also surprisingly popular given their limited capacity and high
  price are "flopticals."  A floptical drive is about the size of an
  external floppy drive, costs around $450 and can store 21 megabytes
  of data on 3.5" disks that cost about $18 each.  Since floptical
  drives can also read and write high density (but not 800K) floppies
  they're a reasonable choice if you need a second floppy drive.
  However the twenty-one megabyte disks are too small for backing up
  large hard drives or for transporting desktop publishing files and
  graphics.  Furthermore at only about twice the speed of on ordinary
  floppy the media is slower than its competition.  Since higher
  capacity drives in other formats cost about the same, I advise
  against floptical technology.


WHAT'S THE BEST CD-ROM DRIVE?  (7.4)
------------------------------------

       There are three features you should look for in a CD-ROM drive.
  First and most importantly you want at least a double-speed drive.
  If cost is your only concern single speed drives are available for
  as little as $150 but they're painfully slow for most applications.
  You'll also sacrifice many other bells and whistles.  NEC recently
  introduced a triple-speed CD mechanism which is sold both by them
  and other manufacturers.  These drives cost about 50% more than a
  similar double speed drive.  They may be useful if you mainly
  retrieve text, graphics and other data files from CDs.  However most
  multimedia applications and games designed to be run from a CD are
  optimized to work best at double-speed and will gain little if any
  advantage from a triple-speed drive.  Furthermore quadruple speed
  drives are already available (though expensive) and I suspect that
  most manufacturers and software vendors will jump straight to the
  quadruple speed format and skip the triple speed drives completely.
  Secondly the drive should be "multi-session, PhotoCD compatible."
  Many drives on the market advertised as "PhotoCD compatible" but
  can only read the first set of photos on a PhotoCD.

       Finally you want a drive with excellent audio capabilities
  including playback of audio CD's and digital copying of audio CD's
  to your hard disk.  That last capability is the kicker.  It's
  available out of the box only with the various versions of the Apple
  CD-300, but FWB's CD-ROM Toolkit adds support for digital audio
  extraction on drives based around the following mechanisms: the
  Chinon 535, Hitachi 6750, NEC 3x, Sony 561, and Toshiba 3301, 3401
  and 4101.



================
PRINTERS  (8.0)
================

WHAT'S A GOOD PRINTER?  (8.1)
-----------------------------

       If price is your primary concern buy either a StyleWriter II or
  a DeskWriter 520.  Both provide excellent black and white and grey
  scale output at a reasonable price.  The StyleWriter occupies less
  desk space and costs a few dollars less ($250 street vs. $300 for
  the DeskWriter 520) while the DeskWriter has higher resolution (600
  by 300 dpi vs. 360 by 360 dpi).  Neither is a speed demon.

       If you want a faster printer with better quality but don't want
  to pay a lot, or if you want a minimum cost PostScript printer, the
  TI MicroWriter and the DEC 1150 are both good buys.  Each includes 2
  megabytes of RAM, PostScript Level II, 300 dpi 4 page per minute
  output and costs around $550 street.  The MicroWriter also offers
  auto-switching between PostScript Level II and HP PCL 4.  Either
  one should be plenty for personal use.

       If you do heavy graphics or desktop publishing work, you need a
  600 dpi printer.  Apple's LaserWriter Select 360 at $1400 street is
  an excellent printer with 600 dpi resolution, 7 megabytes of memory,
  upgradeable to 16 megabytes, auto-switching between PostScript Level
  II and PCL 4, and a built-in TrueType rasterizer.  Plus it doesn't
  have the paper curl problem associated with the other competitor in
  this price range, the HP LaserJet 4M.  Unfortunately the Select 360
  doesn't have Ethernet or a SCSI port for external font storage so
  it's not ideal for workgroup use (unless your workgroup's on
  LocalTalk).  If you want Ethernet and a SCSI port then consider
  Apple's LaserWriter Pro 630 ($1800 street) instead.  However look
  for some exciting (i.e. 1200 dpi) new products in this price range
  from Hewlett-Packard late this summer.



===================================
MISCELLANEOUS HARDWARE FAQ'S  (9.0)
===================================

WHAT POWER ADAPTOR DO I NEED TO USE MY MAC IN ANOTHER COUNTRY?  (9.1)
---------------------------------------------------------------------

       All Mac CPU's since the SE EXCEPT for the Classic and Classic
  II have universal power supplies which work anywhere in the world.
  These CPU's only need a common adaptor plug to match the Mac's plug
  to the wall plug in the country in question.  You can buy one in
  almost any hardware store for about three dollars.  The same is true
  of the Duo docks, all Apple CD drives except the original AppleCD
  SC, all external Apple SCSI hard drives and all Apple monitors
  except for the 12" RGB monitor and the 14" Basic Color Monitor.

       Products without universal power supplies were typically sold
  in two models, 110V/120V at 60 Hz for Japan and North America,
  220V/240V  at 50 Hz everywhere else.  Thus depending on the origin
  and destination the Classic, Classic II, Plus, 512KE, 512 and 128K
  Macs need an adaptor plug and either a 220V/240V to 110V/120V
  grounded isolation step-down transformer or a 110V/120V to 220V/240V
  grounded isolation step-up transformer, NOT a voltage converter (at
  least not unless you plan to use your Mac as a disposable egg
  fryer).  The same kind of transformer is needed by the 12" RGB
  monitor, the Basic Color Monitor, StyleWriter, StyleWriter II,
  ImageWriter I, and LaserWriters LS, NT, SC, IINT, IINTX, IIf,
  IIg, 300, 310 and the original AppleCD SC.

       The ImageWriter II, ImageWriter LQ, LaserWriter, LaserWriter
  Plus, LaserWriter Pro 600 and 630, Apple Color Printer, Performa
  Display and all Apple scanners have power supplies that are matched
  not just to the voltage but also to the frequency of the host
  country's wall current.  These should not be used in a country
  with a different power standard.


HOW CAN I FIX THE SOUND ON MY IISI?  (9.2)
------------------------------------------

       When the metal fingers that connect the IIsi speakers and the
  motherboard get rusty, sound can blank out completely.  This may not
  occur until the IIsi has been running for several hours.  As a quick
  fix turn the speaker volume all the way up and then down again.
  This sends a small spike of electricity across the contacts and
  should temporarily dislodge the rust.  If this doesn't work a whack
  on the side of the Mac may also clear the contacts enough to restore
  sound.

       For a permanent and easy fix plug a pair of external speakers
  into the sound out port.  I've heard at least a dozen different
  suggestions for permanent fixes to the internal speakers.  The only
  thing all suggestions have in common is taking the speaker
  subassembly out and putting it back in again.  When you're having
  trouble with electronics, there's just no substitute for pulling
  everything apart and putting it back together again, and that's all
  you really need to do to fix the sound on your IIsi.  The speaker
  assembly is hidden under the hard drive so take that out first.
  Once you've removed the hard drive, spread the four tabs that hold
  the speaker assembly in place and slide it out.  Then clean the
  contacts with isopropyl alcohol.  Even rubbing them hard with a
  paper towel or lightly with sand paper should dislodge enough rust
  to fix them.  You can even coat the contacts with an anti-oxidant
  like DeoxIt or PreservIt to prevent future problems.  You should be
  able to find some such compound at any electronics supply store.




==================
Appendix A: MODELS
==================

    This appendix is a nearly comprehensive list of the different
  species of Apple Macintosh computers.  At the top of each listing is
  the common name of the model.  Any aliases it may have, either
  common nicknames or names under which Apple sold it in other markets
  follow in parentheses, e.g., Mac 128 (Thin Mac).  This is followed
  by fourteen essential characteristics of the model which I'll
  elaborate on now.

       The first important feature is the processor in your computer,
  e.g.,

      Processor:    M68030 8 MHz, M68882 FPU

       The first number is always the central processing unit (CPU).
  This is the main brain of the computer and contributes more to the
  speed of your Mac than any other single factor.  M stands for
  Motorola and means the chip is a member of the Motorola 68000
  family.  The other possibility is PPC which means the chip is a
  member of the PowerPC family from either Motorola, IBM or both.
  Generally within the same family a higher chip number means a faster
  chip.  A 68040 is faster than a 68030 which is faster than a 68000.
  However Macs using the same chip can run at different clock speeds
  measured in megahertz (MHz).  The higher the megahertz the faster
  the Mac.  The clock speeds I list here are rounded to the nearest
  whole number.  More precisely 8 MHz should be 7.83 MHz, 16 MHz
  should be 15.7 MHz and so on.  If a Mac has a floating point
  coprocessor (FPU) or digital signal processor (DSP) that's listed
  here too.  An FPU speeds up most scientific, mathematical, photo
  retouching and ray tracing software.  Most other types of programs
  don't take advantage of it.  A DSP is an even faster FPU used to
  make real-time audio and video feasible.  M68040's and all PowerPC
  processors include integrated floating point units.

       The second feature is the system software which will operate
  that Mac. This is listed as a range of possible systems, e.g.

       System:    6.0.3-7.1

       If any enablers are needed for a model, they're listed here
  too.  Just because a particular system will run on an Mac doesn't
  mean you should use it.  If you're using System 6, I recommend using
  6.0.7 or 6.0.8 with the LaserWriter Driver 8.1, Quicktime and the
  Comm Toolbox.  Any version of System 7 that will boot your Mac will
  serve equally well for most people, but you should make sure you
  have the latest tuneups and enablers.  (See the system faq for more
  details.)

       The next field is RAM capacity, e.g.

       RAM:    1-128 MB, 120 ns, 8 30 pin SIMM slots

       For all but the earliest Macs this is given as a range from the
  least amount of RAM Apple sold with the machine to the maximum
  amount it can support with third party chips.  RAM size is measured
  in megabytes (MB).  One megabyte is 1024 kilobytes which is 1024
  bytes.  A byte represents one letter of text, so one megabyte is
  about three hundred pages of text.  RAM speed is measured in
  nanoseconds (ns), one billionths of a second.  Smaller numbers are faster.  Finally I list the number of slots included for RAM (some of
  which may already be filled in the default configuration) and the
  type of memory that can be installed in these slots.  For more
  details about RAM configurations please refer to "Thanks for the
  Memory", section 4.0 of this document.

       After RAM comes ROM, the non-volatile memory where much of the
  system software is stored.  This is listed as a size in either
  kilobytes or megabytes since that's the only information that's
  commonly available (and more than you really need to know anyway.)
  Larger ROMs tend to be more recent and require less patching under
  newer systems.  512K and larger ROMs are 32-bit clean.  256K and
  larger ROMs include Color QuickDraw.

       Ports are the holes on the back of the Mac into which something
  may be plugged.  ADB stands for Apple Desktop Bus.  It's used for
  plugging in mice, trackballs, keyboards, graphics tablets, and
  obnoxious copy-protection dongles.  ADB devices can be
  daisy-chained, up to three devices per ADB port.  Serial ports are
  used for modems, printers, and LocalTalk networks.  A SCSI
  (pronounced "Scuzzy") port is mainly used for external storage
  devices like hard drives, tape drives, and CD-ROMs; but there also
  printers, monitors, Ethernet connectors, and scanners that can
  attach to the SCSI bus.  Mac SCSI ports are 25 pins.  For more
  details see the SCSI section below.  Most Macs have at least one
  sound port for hooking up external speakers and more recent Macs
  also have a sound in port for a microphone.  These are listed as
  either Mono in/out or Stereo in/out depending on whether the Mac
  supports mono or stereo sound.  Finally if there's a port for an
  external floppy drive, that's indicated by the word "floppy.".

       The Floppy field specifies what kind of internal floppy drive
  the model has, either 400K, 800K or SuperDrive.  For more details
  see section 6.0,  Floppies, below.

       Next I list the drive bays.  Most Macs have exactly one bay for
  a 3.5 inch half-height device, almost always an internal hard drive.
  Some more recent Macs also have room for a half-height, five and a
  quarter inch, removable media drive such as a CD-ROM ar a tape
  backup system.

       Slots are spaces inside the Mac for expansion cards of many
  kinds including accelerators, extra serial ports, graphics cards,
  and more.  The most-common kinds of slots are Nubus and processor
  direct (PDS).  Nubus slots come in small (7") and full-size
  varieties while PDS slots tend to be specific to the model.  LC PDS
  cards do mostly work in all LC slots, but even among Macs that have
  Nubus slots not all cards work in all Macs, so it's best ask a
  vendor if their card works in your Mac before buying.

       Video specifies the characteristics of any built-in monitor and
  the amount of VRAM for models that do not have a built-in monitor.
  See section 6.0 on video to find out the resolutions and color
  depths a given amount of VRAM supports.  "None" means that you'll
  need to use a graphics card as well as an external monitor.

       Audio lists sample rates and bit depth supported by the CPU.
  If there's a built-in speaker and/or microphone, this is mentioned
  as well.  Many Macs that don't have built-in stereo speakers or
  microphones have jacks for external speakers or microphones.  These
  are listed under ports.

       Network specifies the built-in networking capability of the
  Mac, either LocalTalk or Ethernet.  If Ethernet then the connector
  type is also given.  Third party cards and SCSI connectors provide
  options for adding Ethernet to Macs that lack it.

       Size specifies the linear dimensions of the model as height by
  width by depth, then the approximate weight although this can vary
  depending on the size of any internal drives and cards that may be
  installed.  This is the weight and size of the computer itself.  It
  includes the monitor and keyboard only if they're built-in to the
  Mac.  Finally I list the dates between which the model was sold and
  any special features it may have.



Mac 128 (Thin Mac)
Processor: M68000 8 MHz
System:    1.0-2.0
RAM:       128K
ROM:       64K
Ports:     2 serial, floppy, mono out
Floppy:    400K
Bays:      None
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     Mono speaker
Network:   None
Sold:      1/84 till 4/86
Features:  Keyboard

Mac 512 (Fat Mac)
Processor: M68000 8 MHz
System:    1.0-3.3
RAM:       512K
ROM:       64K
Ports:     2 serial, floppy, mono out
Floppy:    400K
Bays:      None
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     Mono speaker
Network:   None Sold: 9/84 till 4/86
Features:  Keyboard

Mac 512KE
Processor: M68000 8 MHz
System:    1.0-4.3
RAM:       512K
ROM:       128K
Ports:     2 serial, floppy, mono out
Floppy:    800K
Bays:      None
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     Mono speaker
Network:   None
Sold:      4/86 till 3/87
Features:  Keyboard

Mac Plus
Processor: M68000 8 MHz
System:    3.0-7.1
RAM:       1-4 MB, 150 ns, 4 30 pin SIMM slots
ROM:       128K
Ports:     2 serial, SCSI, floppy, mono out
Floppy:    800K
Bays:      None
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     Mono speaker
Network:   LocalTalk
Sold:      1/86 till 10/90
Features:  Keyboard

Macintosh SE
Processor: M68000 8 Mhz
System:    3.0-7.1
RAM:       1-4 MB, 150 ns, 4 30 pin SIMM slots
ROM:       256K
Ports:     2 serial, SCSI, floppy, 2 ADB, mono out
Floppy:    1 or 2 800K or SuperDrive
Bays:      One for either a 3.5" internal hard drive or a second floppy drive
Slots:     1 SE Expansion Bus slot
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Network:   LocalTalk
Sound:     Mono out
Sold:      3/87 till 10/90
Features:  Beginning in August, 1989 SE's included a SuperDrive.

SE/30
Processor: M68030 16 MHz, M68882 16 MHz FPU
System:    6.0.3-7.1
RAM:       1-128 MB, 120 ns, 8 30 pin SIMM slots
ROM:       256K
Ports:     2 serial, SCSI, floppy, 2 ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     120 pin 030 PDS
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     8-bit, 22 kHz stereo out
Network:   LocalTalk
Sold:      1/89 till 10/91
Features:  32 bit data bus

Mac II
Processor: M68020 16 MHz, M68881 16 MHz FPU
System:    4.0.1-7.1
RAM:       1-68 MB, 120 ns, 8 30 pin SIMM slots
ROM:       256K
Ports:     2 serial, SCSI, 2 ADB, stereo out
Floppy:    1 or 2 800K
Bays:      1 3.5" half-height
Slots:     6 Nubus
Video:     None
Audio:     Stereo speaker
Network:   Localtalk
Sold:      3/87 till 1/90
Features:  An upgrade is available that adds new ROMs and a SuperDrive.

Mac IIx
Processor: 16 MHz M68030 CPU, 16 MHz M68882 FPU
System:    6.0.2-7.1
RAM:       1-128 MB, 120 ns, 8 30 pin SIMM slots
ROM:       256K
Ports:     2 serial, SCSI, floppy, 2 ADB, stereo out
Floppy:    1 or 2 SuperDrives
Bays:      1 3.5" half-height
Slots:     6 Nubus
Video:     None
Audio:     Stereo speaker
Network:   LocalTalk
Sold:      9/88 till 10/90
Features:

Mac IIcx
Processor: M68030 16 MHz, M68882 16MHz FPU
System:    6.0.3-7.1
RAM:       1-128 MB, 120 ns, 8 30 pin SIMM slots
ROM:       256K
Ports:     2 serial, SCSI, floppy, 2 ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     3 Nubus
Video:     None
Network:   Localtalk
Audio:     Stereo speaker
Dimension: 5.5 x 11.9 x 14.4 in, 14.0 x 30.2 x 36.5 cm
Weight:    13.7 lb., 6.2 kg
Sold:      3/89 till 10/90
Features:

Mac IIci
Processor: M68030    25 MHz, M68882 25MHz FPU
System:    6.0.4-7.1
RAM:       1-128 MB, 100 ns, 8 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, floppy, 2 ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     3 Nubus
Video:     resolutions up to 640 by 870 pixels with 256 colors
Audio:     8-bit, 22 kHz stereo speaker
Network:   LocalTalk
Sold:      9/89 till 2/93
Dimension: 5.5 x 11.9 x 14.4 in, 14.0 x 30.2 x 36.5 cm
Weight:    13.7 lb., 6.2 kg
Features:  Slot for cache card that can speed up performance as much as
           50%.  After October, 1991 this card was bundled with IIci's.

Mac IIsi
Processor: M68030    20 MHz
System:    6.0.6-7.1
RAM:       2-65 MB, 80 ns, 4 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, floppy, ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 Nubus and/or PDS
Video:     supports resolutions of up to 640 by 870 pixels with 256 colors
Audio:     Mono microphone, Stereo speaker
Network:   LocalTalk
Sold:      10/90 till 2/93
Features:  Since this model was designed to be run at 25 MHz it can
  safely be "clock-chipped" to that higher speed.  (See question 4.2)
  Substantial speed boosts are also possible by increasing the cache
  size.  See question 1.3 in the system FAQ.

Mac IIfx
Processor: M68030 40 Mhz, M68882 FPU 40 MHz
System:    6.0.5-7.1
RAM:       4-128 MB, 80 ns, 8 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, floppy, 2 ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     6 Nubus
Video:     None
Audio:     Stereo speaker
Network:   LocalTalk
Sold:      3/90 till 10/91
Features:  32K static RAM cache plus lots of other special, expensive
  orphaned hardware designed to improve speed which software never
  took advantage of.

Mac IIvi
Processor: M68030 16 Mhz
System:    7.1, System Enabler 001 1.0.1
RAM:       4-68 MB, 80 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     3 Nubus
Video:     512K-1MB VRAM
Audio:     Mono microphone, mono speaker
Network:   LocalTalk
Sold:      10/92 till 10/93
Features:  32-bit data bus.  Not sold in the U.S.

Mac IIvx
Processor: M68030 32 Mhz, M68882 FPU 32 MHz
System:    7.1, System Enabler 001 1.0.1
RAM:       4-68 MB, 80 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, mono in, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     3 Nubus
Video:     512K-1MB VRAM
Audio:     Mono microphone, mono speaker
Network:   LocalTalk
Sold:      10/92 till 10/93
Features:  32k data cache, 32 bit data bus.  Since the system runs at half the speed of the CPU, this is only about as fast as the 25 MHz IIci.

Performa 600
Processor: M68030 32 Mhz
System:    7.1, System Enabler 001 1.0.1
RAM:       4-68 MB, 80 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, mono in, stereo out
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     3 Nubus
Video:     512-1MB VRAM
Audio:     Mono microphone, mono speaker
Network:   LocalTalk
Sold:      10/92 till 10/93
Features:  32 bit data bus.  Since the system runs at half the speed
  of the CPU, this is only about as fast as the 20 MHz IIsi.  Identical
  to the IIvx except for the lack of the 32k data cache and FPU.  An FPU
  can be added.  A cache cannot be.

Mac Classic
Processor: M68000 8 Mhz
System:    6.0.6-7.1
RAM:       1-4 MB, 120 ns, 4 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, ADB
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     Mono speaker
Network:   LocalTalk
Sold:      10/90 till 12/91
Features:  Can be booted from the ROM.

Mac Classic II (Performa 200)
System:    6.0.8L-7.1.1
Processor: M68030 16 Mhz
RAM:       4-10 MB, 120 ns, 4 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, floppy, ADB, mono out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     None
Video:     built-in black and white 9" monitor, 512 by 384 resolution
Audio:     8-bit, 11 or 22 kHz, mono speaker, mono microphone
Network:   LocalTalk
Size:      13.2 x 9.7 x 11.2 in, 17.1 lbs (33.6 x 24.6 x 28.5 cm, 7.8 kg)
Sold:      10/91 till Present
Features:

Color Classic
Processor: M68030 16 Mhz
System:    7.1, System Enabler 401 1.0.5
RAM:       4-10 MB, 120 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, mono out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC PDS
Video    built-in 10" Trinitron monitor, 512 by 384 resolution,
           256 colors (expandable to 32000 colors), 76 dpi
Audio:     8-bit, 22 kHz, mono speaker, mono microphone
Network:   LocalTalk
Sold:      2/93 till Present
Features:  Screen Power Saver

Color Classic II
Processor: M68030 33 Mhz
System:    7.1, System Enabler ???
RAM:       4-10 MB, 80 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, mono out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC PDS
Video:     built-in 10" Trinitron monitor, 256 colors expandable to
           32768, 76 dpi
Audio:     8-bit, 22 kHz, mono speaker, mono microphone
Network:   LocalTalk
Sold:      10/93 till Present
Features:  Currently sold only in the Far East.  32-bit data bus.

Mac LC
Processor: M68020 16 Mhz
System:    6.0.6-7.1
RAM:       2-10 MB, 120 ns, 4 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, ADB, floppy, mono out, mono in, video
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC PDS
Video:     256K-512K VRAM
Audio:     8-bit, 22 kHz, mono speaker, mono microphone
Network:   LocalTalk
Size:      3.0 x 12.2 x 15.0 in, 8.8 lbs (8.1 x 31.0 x 38.2 cm, 4.0 kg)
Sold:      10/90 till 12/92
Features:  Can emulate an Apple IIe with the appropriate PDS card.

LC II (Performa 400, 405, 430)
Processor: M68030 16 Mhz
System:    6.0.8L-7.1.1
RAM:       4-10 MB, 120 ns, 4 30 pin SIMM slots
ROM:       512K
Ports:     2 serial, SCSI, ADB, mono out, mono in, video
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC PDS
Video:     512K VRAM
Audio:     8-bit, 22 kHz, mono speaker, mono microphone
Network:   LocalTalk
Size:      3.0 x 12.2 x 15.0 in, 8.8 lbs (8.1 x 31.0 x 38.2 cm, 4.0 kg)
Sold:      3/92 till 10/93
Features:  Can emulate an Apple IIe with the appropriate PDS card.

LC III (Performa 450)
Processor: M68030 25 Mhz
System:    7.1, System Enabler 003 1.0
RAM:       4-32 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     2 serial, SCSI, ADB, mono out, mono in, video
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC PDS
Video:     512K-768K VRAM
Audio:     8-bit, 22 kHz, mono speaker
Network:   LocalTalk
Size:      3.2 x 12.2 x 15.0 in, 8.8 lbs (8.1 x 31.0 x 38.2 cm, 4.0 kg)
Sold:      2/93 till Present
Features:  Can emulate an Apple IIe with the appropriate PDS card.

Mac LC 520 (Performa 550)
Processor: M68030 25 Mhz
System:    7.1, System Enabler 403 1.0.1
RAM:       5-36 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     2 serial, SCSI, ADB, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 LC PDS
Video:     Built-in 14" Trinitron monitor, 640 by 480 pixels, 69 dpi
Audio:     8-bit, 22 kHz, mono microphone, Stereo speaker
Network:   LocalTalk
Size:      17.9 x 13.5 x 16.5 in., 40.5 lbs (45.5 x 34.4 x 42.0 cm, 18.4 kg)
Sold:      6/93 till present
Features:  CD-ROM, 32 bit data bus

Mac LC 550 (Performa 460)
Processor: M68030 33 Mhz
System:    7.1, System Enabler ???
RAM:       5-36 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     2 serial, SCSI, ADB, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 LC PDS
Video:     Built-in 14" Trinitron monitor, 640 by 480 pixels, 69 dpi
Audio:     8-bit, 22 kHz, mono microphone, Stereo speaker
Network:   LocalTalk
Size:      17.9 x 13.5 x 16.5 in., 40.5 lbs (45.5 x 34.4 x 42.0 cm, 18.4 kg)
Sold:      1/94 till present
Features:  CD-ROM, 32 bit data bus

Mac LC 575
Processor: M68LC040 33 Mhz
System:    7.1, System Enabler ???
RAM:       8-36 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     2 serial, SCSI, ADB, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 LC PDS
Video:     Built-in 14" Trinitron monitor, 640 by 480 pixels, 69 dpi
Audio:     8-bit, 22 kHz, mono microphone, stereo speaker
Network:   LocalTalk
Size:      17.9 x 13.5 x 16.5 in., 40.5 lbs (45.5 x 34.4 x 42.0 cm, 18.4 kg)
Sold:      2/94 till Present
Features:  CD-ROM (optional on Performa 460), 32 bit data bus

Centris 610
Processor: M680LC40 20 Mhz
System:    7.1, System Enabler 040 1.1
RAM:       8-68 MB, 80 ns, 2 72 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, ADB, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 7" Nubus or Quadra PDS slot
Video:     512K-1MB VRAM drives all Mac monitors plus some VGA,
           SVGA, NTSC, and PAL monitors
Audio:     22 KHz, mono microphone, stereo speaker
Network:   Localtalk, optional Ethernet
Size:      3.4 x 16.3 x 15.6 in, 14.0 lbs (8.5 x 41.5 x 39.7 cm, 6.4 kg)
Sold:      2/93 till Present
Features:  FPU can be added by replacing the 680LC40 with a 68040 CPU.
           No heat sink is necessary for this upgrade.

Centris 650
Processor: M68040 25 Mhz
System:    7.1, System Enabler 040 1.1
RAM:       8-136 MB, 80 ns, 4 72 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, stereo out, mono in, AAUI-15
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     3 Nubus, one Quadra PDS
Video:     512K-1MB VRAM drives all Mac monitors plus some VGA,
           SVGA, NTSC, and PAL monitors
Audio:     Mono microphone, stereo speaker
Network:   LocalTalk, Ethernet
Size:      6.0 x 13.0 x 16.5 in, 25 lb (15.2 x 33.0 x 41.9 cm, 11.3 kg)
Sold:      2/93 till
Features:  Some models have only 4 megabytes of soldered RAM and no
           Ethernet.  These can only be expanded to 132 megabytes.

Centris 660av (aka Quadra 660av)
Processor: M68040 33 Mhz, 55-MHz AT&T 3210 DSP
System:    7.1, System Enabler 088 1.1
RAM:       8-68 MB, 70 ns, 2 72 pin SIMM slots
ROM:       2 MB
Ports:     Geoport, 2 serial, SCSI, ADB, stereo out, stereo in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 7" Nubus
Video:     1MB-2MB VRAM drives all Mac monitors plus some VGA, SVGA, NTSC,
           and PAL monitors; 2 S-Video and two composite video ports, one
           each for input and output.
Audio:     16 bit, 8-48 kHz, mono microphone, stereo speaker
Network:   LocalTalk, Ethernet
Size:      3.4 x 16.3 x 15.6 in, 14.0 lbs (8.5 x 41.5 x 39.7 cm, 6.4 kg)
Sold:      7/93 till Present
Features:  PlainTalk speech recognition, video capture,

Quadra 605 (LC 475, Performa 475, Performa 476)
Processor: M68LC040 25 Mhz
System:    7.1, System Enabler 065 1.0
RAM:       4-36 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     2 ADB, SCSI, 2 serial, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     1 LC III PDS
Video:     512K-1MB VRAM drives all Mac monitors plus some VGA,
           SVGA, NTSC, and PAL monitors
Audio:     8-bit, 11 or 22 kHz, stereo microphone, stereo speaker
Network:   LocalTalk
Size:      3.2 x 12.2 x 15.0 in, 8.8 lbs (8.1 x 31.0 x 38.2 cm, 4.0 kg)
Sold:      10/93 till Present
Features:

Quadra 610
Processor: M68040 25 Mhz (M680LC40 on 8/160 models sold in the U.S.)
System:    7.1, System Enabler 040 1.1
RAM:       8-72 MB, 80 ns, 2 72 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, SCSI, 2 serial, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 7" Nubus or Quadra PDS slot
Video:     512K-1 MB VRAM drives all Mac monitors plus some VGA, SVGA,
           NTSC, and PAL monitors
Audio:     22 KHz, Mono microphone, stereo speaker
Network:   LocalTalk, optional Ethernet
Size:      3.4 x 16.3 x 15.6 in, 14.0 lbs (8.5 x 41.5 x 39.7 cm, 6.4 kg)
Sold:      10/28/93 till Present
Features:

Quadra 610 DOS compatible
Processor: M68LC040 25 Mhz, 486SX 25 MHz
System:    7.1, System Enabler 040 1.1
RAM:       8-72 MB, 80 ns, 2 72 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, SCSI, 2 serial, stereo out, mono in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 7" PDS slot filled with DOS compatibility card
Video:     512K-1 MB VRAM drives all Mac monitors plus some VGA, SVGA,
           NTSC, and PAL monitors.  Dual monitor support.
Audio:     22 KHz, Mono microphone, stereo speaker
Network:   LocalTalk, optional Ethernet
Size:      3.4 x 16.3 x 15.6 in, 14.0 lbs (8.5 x 41.5 x 39.7 cm, 6.4 kg)
Sold:      10/28/93 till Present
Features:  MS-DOS 6.2

Quadra 650
Processor: M68040 33 Mhz
System:    7.1, System Enabler 040 1.1
RAM:       8-136 MB, 80 ns, 4 72 pin SIMM slots
ROM:       1 MB
Ports:     2 serial, SCSI, 2 ADB, headphone jack
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     3 Nubus, one Quadra PDS
Video:     512K-1 MB VRAM drives all Mac monitors plus some VGA, SVGA,
           NTSC, and PAL monitors
Audio:     22 khz, Mono microphone, stereo speaker
Network:   LocalTalk, Ethernet
Size:      6.0 x 13.0 x 16.5 in, 25 lb (15.2 x 33.0 x 41.9 cm, 11.3 kg)
Sold:      10/28/93 till present
Features:

Quadra 700
Processor: M68040 25 Mhz
System:    7.1
RAM:       4-128 MB, 80 ns, 4 30 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, 2 serial, SCSI, video, stereo out, mono in, AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      1 3.5" half-height
Slots:     2 Nubus, 1 Quadra PDS
Video:     512K-2 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTSC
Audio:     Mono in, stereo out, microphone
Network:   LocalTalk, Ethernet
Dimension: 5.5 x 11.9 x 14.4 in, 14.0 x 30.2 x 36.5 cm
Weight:    13.7 lb., 6.2 kg
Sold:      10/91 till
Features:

Quadra 800
Processor: M68040 33 Mhz
System:    7.1
RAM:       8-132 MB, 60 ns, 4 72 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, 2 serial, SCSI, video, stereo out, mono in, AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      1 3.5" full-height, 1 5.25" half-height removable
Slots:     3 NuBus, 1 Quadra PDS
Video:     512K-1 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTSC
Audio:     Mono in, stereo out
Network:   LocalTalk, Ethernet
Size:      14.25 x 8.9 x 16 in, 25.3 lbs (30.6 x 19.6 x 39.6 cm, 11.5 kg)
Sold:      2/93 till present
Features:

Quadra 840av
Processor: M68040 40 Mhz, AT&T 3210 66 MHz DSP
System:    7.1
RAM:       8-128 MB, 60 ns, 4 72 pin SIMM slots
ROM:       2 MB
Ports:     ADB, SCSI, 2 serial, Ethernet AAUI-15, stereo in, stereo out,
           GeoPort, 2 S-Video and two composite video ports, one each for
           input and output.
Slots:     3 Nubus 90, 1 Quadra PDS
Floppy:    SuperDrive
Bays:      1 3.5" full-height, 1 5.25" half-height removable
Video:     Built-in support Expandable with an extra 1 MB VRAM to 24-bit
           color on 16" monitors, 16-bit color on larger monitors,
           NTSC out, PAL out
Audio:     16 bit, 8-48 kHz, mono microphone, stereo speaker
Network:   Ethernet, LocalTalk
Size:      14.25 x 8.9 x 16 in, 25.3 lb (30.6 x 19.6 39.6 cm, 11.5 kg)
Sold:      7/93 till Present
Features:  DMA, async SCSI, PlainTalk, video capture

Quadra 900
Processor: M68040 25 Mhz
System:    7.1
RAM:       4-256 MB, 80 ns, 16 30 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, 2 serial, SCSI, video, stereo out, stereo in, AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      3 3.5" half-height bays
Slots:     5 Nubus, 1 Quadra PDS
Video:     1-2 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTS
Audio:     Mono Microphone, stereo in, stereo out
Network:   LocalTalk, Ethernet
Size:      18.6 x 8.9 x 20.6 in, 37 lbs (47.3 x 22.4 x 52.3 cm, 17 kg)
Sold:      10/91 till 5/92

Quadra 950
Processor: M68040 33 Mhz
System:    7.1
RAM:       8-256 MB, 80 ns, 16 30 pin SIMM slots
ROM:       1 MB
Ports:     2 ADB, 2 serial, SCSI, video, stereo out, stereo in, mono in,
           AAUI-15 Ethernet connector
Floppy:    SuperDrive
Bays:      3 3.5" half-height bays
Slots:     5 Nubus, 1 Quadra PDS
Video:     1-2 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTS
Audio:     Mono Microphone, stereo in, stereo out
Network:   LocalTalk, Ethernet
Size:      18.6 x 8.9 x 20.6 in, 37 lbs (47.3 x 22.4 x 52.3 cm, 17 kg)
Sold:      5/92 till Present
Features:

Mac TV
Processor: M68030 32 MHz
System:    7.1, System Enabler 404 1.0
RAM:       5-8 MB, 80 ns, 1 72 pin SIMM slot
ROM:       1 MB
Ports:     SCSI, 2 serial, 2 ADB, cable, video-in, stereo out, stereo in
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 PDS occupied by TV tuner
Video:     14" Trinitron, 8-bit color
Audio:     8-bit, 22kHz, stereo speakers
Network:   LocalTalk
Size:      17.5 x 13.5 x 16.5 in., 41.5 lbs (44.5 x 34.4 x 42.0 cm, 18.9 kg)
Sold:      10/93 till Present
Features:  cable-ready, 16-bit color TV, CD-ROM, single-frame
           video-capture, remote control, ClarisWorks, 7 CD's, keyboard

PowerMac 6100/60
Processor: PPC 601 60 MHz
System:    7.1.2
RAM:       8-72 MB, 80 ns, 2 72 pin SIMM slots
ROM:       4 MB
Ports:     ADB, SCSI, 2 GeoPort, video, stereo in, stereo out,
           AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     1 7" Nubus or PDS slot
Video:     DRAM based, 32,768 colors on 14" monitors, 256 colors on
          16" monitors
Audio:     22 KHz, mono microphone, stereo speaker
Network:   LocalTalk, Ethernet
Size:      3.4 x 16.3 x 15.6 in, 14.0 lbs (8.5 x 41.5 x 39.7 cm, 6.4 kg)
Sold:      3/14/94 till Present
Features:  Optional AV configuration, optional VRAM card for the
           PDS slot

PowerMac 7100/66
Processor: PPC 601 66 MHz
System:    7.1.2
RAM:       8-136 MB, 80 ns, 4 72 pin SIMM slots
ROM:       4 MB
Ports:     2 ADB, SCSI, 2 GeoPort, 2 video, stereo in, stereo out, AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      1 3.5" half-height, 1 5.25" half-height removable
Slots:     3 Nubus, one PDS (occupied by AV card or VRAM card)
Video:     1-2 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTSC,
           and PAL monitors.  DRAM support for a second monitor, 32,768
           colors on 14" monitors, 256 colors on 16" monitors
Audio:     22 khz, Mono microphone, stereo speaker
Network:   LocalTalk, Ethernet
Size:      6.0 x 13.0 x 16.5 in, 25 lb (15.2 x 33.0 x 41.9 cm, 11.3 kg)
Sold:      3/14/94 till present
Features:  Optional AV configuration

PowerMac 8100/80
Processor: PPC 601 80 MHz
System:    7.1.2
RAM:       8-264 MB, 80 ns, 8 72 pin SIMM slots
ROM:       4 MB
Ports:     ADB, 2 GeoPort, SCSI, 2 video, stereo in, stereo out, AAUI-15 Ethernet
Floppy:    SuperDrive
Bays:      1 3.5" full-height, 1 5.25" half-height removable
Slots:     3 NuBus, 1 PDS (occupied by AV card or VRAM card)
Video:     2-4 MB VRAM drives all Mac monitors plus some VGA, SVGA, NTSC
           and PAL monitors.  DRAM support for a second monitor, 32,768
           colors on 14" monitors, 256 colors on 16" monitors
Audio:     stereo speaker
Network:   LocalTalk, Ethernet
Size:      14.25 x 8.9 x 16 in, 25.3 lbs (30.6 x 19.6 x 39.6 cm, 11.5 kg)
Sold:      3/14/94 till present
Features:  Optional AV configuration, 256K L2 cache

Macintosh Portable
Processor: M68000 16 MHz
System:    6.0.5-7.1.1
RAM:       1-5 MB, 100 ns, 1 memory slot
ROM:       256K
Ports:     SCSI, floppy, stereo out
Floppy:    1-2 SuperDrives
Bays:      1 3.5 inch half-height
Slots:     None
Video:     built-in black and white 10" monitor, 640 by 400 resolution
Audio:     Stereo out
Network:   LocalTalk
Sold:      9/89 till 10/91
Features:  Portables sold after March, 1991 have backlit screens.

Powerbook 100
Processor: M68000 16 MHz
System:    6.0.8L-7.1.1
RAM:       2-8 MB, 100 ns, 1 TSOP memory slot
ROM:       256K
Ports:     SCSI, serial, floppy, ADB, mono out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     None
Video:     built-in black and white, passive matrix, 640 by 400 pixel screen
Audio:     8-bit, 11 or 22 KHz, mono speaker
Network:   LocalTalk
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      10/91 till
Features:  The hard disk can be attached to another Mac through the PowerBook's SCSI port.

Powerbook 140
Processor: M68030 16 MHz
System:    7.0.1-7.1.1
RAM:       4-8 MB, 100 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, mono in, stereo out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     None
Video:     built-in 10", B/W, passive matrix, 640 by 400 pixel screen
Audio:     8-bit, 11 or 22 KHz stereo speaker, mono microphone
Network:   LocalTalk
Battery:   NiCad, 2.5 Ah, 2 to 3 hours of usage, 3 hours recharge time
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      10/91 till 6/93
Features:

Powerbook 145
Processor: M68030 25 MHz
System:    7.0.1-7.1
RAM:       4-8 MB, 100 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, mono in, stereo out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     None
Video:     built-in 10", B/W, passive matrix, 640 by 400 pixel screen
Audio:     8-bit, 11 or 22 KHz, mono speaker, mono microphone
Network:   LocalTalk
Battery:   NiCad, 2.5 Ah, 2 to 3 hours of usage, 3 hours recharge time
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      8/92 till 6/93
Features:

Powerbook 145b
Processor: M68030 25 MHz
System:    7.0.1-7.1
RAM:       4-8 MB, 100 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, audio in, audio out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 Modem slot
Video:     built-in 10", B/W, passive matrix, 640 by 400 pixel screen
Audio:     8-bit, 11 or 22 KHz, mono speaker, mono microphone
Network:   LocalTalk
Battery:   NiCad, 2 to 3 hours of usage, 3 hours recharge time
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      6/93 till Present
Features:  No system disks are included with this model.

Powerbook 160
Processor: M68030 25 MHz
System:    7.1, System Enabler 131 1.0.3
RAM:       4-14 MB, 85 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, SCSI, 2 serial, mono in, stereo out, video
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 Modem slot
Video:     built-in 10", 16 greys, passive matrix, 640 by 400 pixels
Audio:     8-bit, 11 or 22 KHz, stereo speaker, mono microphone
Network:   LocalTalk
Battery:   NiCad, 2 to 3 hours of usage, 3 hours recharge time
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      10/92 till 8/93
Features:

Powerbook 165
Processor: M68030 33 MHz
Sysytem:   7.1, System Enabler 131 1.0.3
RAM:       4-14 MB, 85 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, SCSI, 2 serial, mono in, stereo out, video
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 640 by 400 pixel passive matrix screen, 16 grays;
           video out for up to 256 colors at 640 by 480 on an external display
Audio:     8-bit, 11 or 22 KHz, mono speaker, mono microphone
Network:   LocalTalk
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      8/93 till present
Features:

Powerbook 165c
Processor: M68030 33 MHz, M68882 FPU
Sysytem:   7.1, System Enabler 131 1.0.3
RAM:       4-14 MB, 85 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, SCSI, 2 serial, mono in, stereo out, video
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 9", 256 color, passive matrix screen, 640 by 400 pixels;
           video out for up to 256 colors at 640 by 480 on an external display
Audio:     8-bit, 11 or 22 KHz, stereo speaker, mono microphone
Network:   LocalTalk
Battery:   NiCad, 1.5 to 2 hours of usage, 3 hours recharge time
Size:      2.29 x 11.25 x 9.3 in., 7.0 lbs. (5.7 x 28.6 x 23.6 cm, 3.2 kg)
Sold:      2/93 till present
Features:

Powerbook 170
Processor: M68030 25 MHz, M68882 FPU
Sysytem:   7.0.1-7.1
RAM:       2-8 MB, 100 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, stereo out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     Black and White, active matrix
Audio:     8-bit, 11 or 22 KHz, stereo speaker, mono microphone
Network:   LocalTalk
Sold:      10/91 till present
Features:

Powerbook 180
Processor: M68030 33 MHz, M68882 FPU
Sysytem:   7.1, System Enabler 131 1.0.3
RAM:       4-14 MB, 85 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, mono in, stereo out, video-out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 Modem slot
Video:     built-in 10" active-matrix, 16 greys, 640 by 400 pixels, 77 dpi;
           video out for up to 256 colors at 640 by 480 on an external display
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Battery:   NiCad, 2.5 to 3 hours of usage, 3 hours recharge time
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      10/19/92 till present
Features:

Powerbook 180c
Processor: M68030 33 MHz, M68882 FPU
Sysytem:   7.1, System Enabler 131 1.0.3
RAM:       4-14 MB, 85 ns, 1 TSOP memory slot
ROM:       1 MB
Ports:     ADB, 2 serial, SCSI, mono in, stereo out, video-out
Floppy:    SuperDrive
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 10" active-matrix, 256 colors, 640 by 400 pixels, 77 dpi;
           video out for up to 256 colors at 640 by 480 on an external display
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Battery:   Nickel-cadmium, 1 to 2 hours of usage
Size:      2.25 x 11.25 x 9.3 in., 6.8 lbs. (5.7 x 28.6 x 23.6 cm, 3.1 kg)
Sold:      6/93 till present
Features:

Duo 210
Processor: M68030 33 MHz
System:    7.1, PowerBook Duo Enabler 1.0
RAM:       4-24 MB, 85 ns, 1 memory slot
ROM:       1 MB
Ports:     Serial Port, 152 pin PDS (for docking station)
Floppy:    None
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 9" passive-matrix 16 greys screen, 640 by 400 pixels, 85 dpi
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Battery:   Nickel hydride, 2 to 4 hours of usage
Size:      8.5 x 10.9 x 1.4 in., 4.2 lbs. (21.6 x 27.7 x 3.6 cm, 1.9 kg)
Sold:      10/92 till present
Features:  External floppy drives and docking stations sold separately.

Duo 230
Processor: M68030 33 MHz
System:    7.1, PowerBook Duo Enabler 1.0
RAM:       4-24 MB, 85 ns, 1 memory slot
ROM:       1 MB
Ports:     Serial Port, 152 pin PDS (for docking station)
Floppy:    None
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 9" passive-matrix screen, 16 greys, 640 by 400 pixels, 85 dpi
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Size:      8.5 x 10.9 x 1.4 in., 4.2 lbs. (21.6 x 27.7 x 3.6 cm, 1.9 kg)
Sold:      10/92 till present
Features:  External floppy drives and docking stations sold separately.

Duo 250
Processor: M68030 33 MHz
System:    7.1, PowerBook Duo Enabler 1.0
RAM:       4-24 MB, 85 ns, 1 memory slot
ROM:       1 MB
Ports:     Serial Port, 152 pin PDS (for docking station)
Floppy:    None
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:      built-in 9" active-matrix 640 by 400 pixels, 85 dpi
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Battery:   Type II nickel metal hydride battery.
Size:      1.5 x 10.9 x 8.5 in., 4.2 lbs. (3.8 x 27.7 x 21.6 cm, 2.2 kg)
Sold:      10/93 till present
Features:  External floppy drive and docking stations sold separately.

Duo 270c
Processor: M68030 33 MHz, M68882 FPU
System:    7.1, PowerBook Duo Enabler 1.0
RAM:       4-32 MB, 85 ns, 1 memory slot
ROM:       1 MB
Ports:     Serial Port, 152 pin PDS (for docking station)
Floppy:    None
Bays:      1 2.5" third-height
Slots:     1 modem slot
Video:     built-in 8.4 inch, 93 dpi, active matrix screen; 256 colors at
           640 by 480 pixels, 32768 colors at 640 by 400 pixels
Audio:     8-bit, 11 or 22 KHz, mono microphone, mono speaker
Network:   LocalTalk
Battery:   Type II nickel metal hydride battery, 2 to 4 hours usage
Size:      1.5 x 10.9 x 8.5 in., 4.2 lbs. (3.8 x 27.7 x 21.6 cm, 2.2 kg)
Sold:      10/93 till present
Features:  External floppy drive and docking stations sold separately.



--
   Elliotte Rusty Harold     Department of Mathematics
   [e-mail]     New Jersey Institute of Technology
   [e-mail]    Newark NJ 07103