This is yet another incomplete project that I am trying to finish... I
have an IBM System/23 Datamaster, and I am attempting to get it to
work. When turned on, it displays a series of numbers on the screen,
and stops at "FD". Of the numbers printed, "0B" is inverted and
flashing. I found a listing of the error codes in google's cache of
classiccmp.org (part of the archive seems to be down).
http://216.239.51.104/search?q=cache:83dbK69EHG8J:www.classiccmp.org/
mail-archive/classiccmp/1997-07/0566.html+IBM+System/
23+error+site:www.classiccmp.org&hl=en&ie=UTF-8 According to this,
the error code "0B" indicates that one of the ROM chips on the logic
board has failed. The chip is soldered to the board, but replacing it
with a socket and an EPROM shouldn't be a problem, but I don't know
anything about these chips, or if they have an EPROM equivalent. I have
repaired my EPROM programmer, so I now have the ability to burn my own
EPROM chips. The problem I face now is that I need the data for the new
chip. Does anyone have a ROM image of this chip that they could send
me? Also, does anyone know the pinouts of these ROM chips on the
System/23 board? (or as IBM calls them, ROS modules, for Read Only
Storage). Thanks!
Ian Primus
ian_primus_at_yahoo.com
Received on Sat Oct 18 2003 - 22:11:00 BST