Command Post 6/Command Post 6.iso/gambild/pbgprob.txt

Text File | 1995-08-22 | 12KB | 314 lines

^C^BCommon System Problems^b^c
^C(c)1994,1995 Terry E. Mercer^c

There are a number of problems which can, and often do, occur when trying
to run DOS programs on a computer, especially some of the more impressive
games.

The most common problems encountered with DOS based programs are:

        1. Not Enough Memory;

        2. System Configured Incorrectly (or not in a
           standard fashion);

        3. Sound not working or locking system;

        4. Trying to save your data or otherwise write to
           the CD Rom disc (impossible) but many people
           still try.


^BProblem #1: Not Enough Memory^b

The most common reason a DOS based program doesn't start is that there is
not enough conventional RAM memory. A DOS based computer (IBM PC or
compatible) has inherent limits for DOS applications (programs) regarding
memory access.

You may have heard of the "640K barrier," which is what NORMAL DOS is
limited to... 640,000 bytes of "conventional memory." With DOS 5 and
above, or using a special memory enhancement program (such as QEMM),
there is another 384K of upper memory if made available... but difficult
for the average user to configure correctly.

No matter how much memory a DOS based computer has, the limits on
conventional memory is still 640+384 (max) minus xxK being used by the
programs and environment being loaded at start up by the Autoexec.Bat and
Config.Sys files... even with 16 Megabytes or more.

Using memory managers is possible (and usually easy) to do. Some basic
changes may be required to enhance your systems ability to recognize more
of its memory. DOS v6 shipped with MEMMAKER. This program can be very
beneficial if you are NOT on a network and don't have any unique cards in
your system. I wouldn't recommend using it, except as a last resort and
knowing that there is a chance it could make matters worse (although less
than 20% likely).

^BProblem #2 - System Configured Incorrectly (or not in a^b
^B             standard fashion);^b

If you purchased a computer completely set up, with all the programs and
special cards (i.e., sound cards, modems, and scanners, etc.) then you run
a slight risk that the person which set up your system didn't do it quite
right, and/or had optimized it for the programs they used most often...
not for YOUR needs. You may need to have a trained computer technician
make such changes & optimize the system for your specific needs. We do NOT
recommend the use of MEMMAKER (supplied with DOS v6 and higher) as a cure.
MEMMAKER does NOT take a few very important factors into account, and can
actually HURT or WORSEN the problems. *Please make a BACKUP of the following
files: Autoexec.Bat and Config.Sys before attempting to change them (whether
manually or using a program like MEMMAKER).

^BProblem #3 - Sound not working or locking up the system;^b

There are dozens of different sound cards on the market. Some have a lot
of features, others are limited. In the Windows world, Microsoft Windows
controls the sound (video, mouse, printer, etc.) which means that if a
device works in one Windows program, it will automatically work with all
such programs. DOS, however, isn't that standard or automatic. Each DOS
program must use it's own video drivers, sound drivers, etc. therefore
incompatibilities are not only possible, but also probable if your system
is slightly out of the "ordinary," or "tweaked" with non-standard and/or
high-end components.

The most common things you can check (and try) regarding any problems
with your sound card are:

        a) Are your speakers plugged in and powered on? This
           is suprisingly common.

        b) Run the test for 8-bit, 16-bit, and FM sounds from
           DOS - NOT WINDOWS! Just because sound works in Windows
           it doesn't mean DOS is configured correctly. Most all
           Sound cards ship with a Sound Test program, or have a
           "Test Sound" in their configuration file. If it doesn't
           work here, NO DOS game (program) can work effectively.

        c) Look in your Autoexec.Bat and Config.Sys files,
           verify the settings. A220, D1, and I7(or 5) are
           the most common settings for Sound Blaster and
           compatibles (A=Address, D=DMA Channel, and
           I=IRQ or Interrupt).

        d) Verify that the program is set correctly. Some
           programs have a "Setup" or configure on the
           main menu, other programs have it accessible
           through another program, you may have to look
           and see for EACH program you are having trouble
           with. Also, remember, if the program was
           intended to run directly from a CD Rom disc,
           and the setup program is not on the main menu
           (i.e., a separate program) you will probably
           have to INSTALL the program to your hard disc
           drive to make it run, as the new settings can't
           be saved to the CD Rom disc.

        e) If your system starts the sound, THEN locks up,
           chances are you are either getting power feed
           back from amplified speakers, or having a
           problem with the 16-bit compatibility. Try
           selecting regular Sound Blaster (not SB 16 or
           SB Pro). You may set the IRQ to 7 rather than
           5. IRQ 5 began with the release of SB 16, and
           many older 8 bit card and 16 bit compatibles
           can't access IRQ 5 correctly. If that doesn't
           work please consult your sound card manual or
           a local technician.

__________________________________________________________
                Some basic hints and tips
----------------------------------------------------------
 (if you are brave enough to try modifying or optimizing
             your system... at your own risk)

The following commands should be in the top three lines of your CONFIG.SYS
file (with few exceptions) to optimize most DOS programs:

^TDEVICE=C:\DOS\HIMEM.SYS
^TDOS=HIGH,UMB
^TDEVICE=C:\DOS\EMM386.EXE M9 2048 RAM

The first two lines tell your computer to use the high memory... the
memory BETWEEN the 640K barrier and the 1024K (first megabyte) which
normally is un-used and sits idle. The third line loads a memory manager
(supplied with your DOS and Windows).

NOTE: On some systems the "M9" switch will need to be removed from the
command line, as it CAN lock your system. However, if it doesn't lock your
system it should give you an additional 64K block of upper memory (one
page frame normally reserved for EGA, for the techies).

The "2048 RAM" section tells the computer to set up 2 Megs of EMS memory
(which many DOS programs can access and use). You will see "NOEMS" in here
if the computer has been optimized for Windows use. Consider a Multiple
Boot set-up. It should solve most all of your problems for your current
computer software (if done correctly) however, will require a little more
manual effort when installing programs that try to change your start-up
files (i.e., Autoexec.Bat & Config.Sys).

If you type MEM /C at the DOS prompt (C:\>) your memory usage will be
displayed. Check you memory BEFORE and AFTER you make changes. Pay
attention to the lines (toward the bottom) that says, "Largest Exectutable
Program Size." The number in the parens (XXXK) is the answer. Some
programs won't run unless that number is as much as 605K! The individual
program should tell you what is required.

There are a number of things you can try. But, unless you are comfortable
editing system files, have a computer technician set up a Multi-Config
(different ways your computer can start up, depending on what you want it
to do at that time). This person will also be able to (if they are good)
optimize your system for you, both memory & data. Have them check for
fragments, and things which would speed up your system. This is generally
the least stressful and smartest move. If you want to try this task on
your own, use the following resources:

^CDan Gookin's  DOS for Dummies^c
^CYour D