[comp.sys.ibm.pc.misc] Help with old IBM AT

ronz@aplcen.apl.jhu.edu (Zahavi Ron) (05/15/91)

A friend of mine recently became the proud owner of an old IBM AT
raffled as "as is old equipment" at his office.  Besides the
computer, keyboard, monitor and DOS manual, no documentation was
available on the system.  He asked for my help when he tried to
run games and the computer hung.  As far as I can tell, the
color card that came with the computer has no graphics capability.

I was wondering if anyone out there can tell me if they are
familiar with this type of configuration and if it is possible
through some hardware or software option to use it in graphics
mode.  If not, what graphics cards would be compatible with this
system?

What confuses me is that test software I have indicates the card is
a CGA card, however, I cannot get anything but color text 80x25.
I never knew such a card existed, I guess it's just another 
marketing tool to sell more hardware (or is the card defective?).

The system is an IBM 3270 AT with a 5272 color monitor.  It has
a 20 Meg HD and a 360k floppy (that surprised me too, I expected
to see a 1.2).  As far as I can see the video card does not have
any switches to set, nor does it have any clear identification 
markings.  The only words I can find on it (if it helps anyone
to identify it) are:

M   970-8523
PC  21.676 Mhz

CTS Singapore
MX0 - 55 GA-2C
      16.257 Mhz
      8416 00

Please mail any responses to ronz@aplcen.apl.jhu.edu

Thanks,
 
 -- Ron --