IBM System/23 ROM help needed

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(a)yahoo.com