Another IBM System/23 Datamaster collector just sent me these scanned maintenance manuals. I haven’t had a chance to take a close look to them yet, but I can already see they’re going to be very helpful because at least one of them includes PINOUTS! They’ve also been sent over to Bitsavers for archival. Enjoy!
The IBM System/23 Datamaster computer, a direct predecessor of the venerable IBM PC.
Here are some pictures of the circuit card drawer and plug-in cards of my System/23 Datamaster. I took them in order to compare my machine vs. a couple machines owned by another nearby collector. I apologize for the less than ideal lighting and focus.
I just became the proud new owner of an IBM System/23 Datamaster computer system yesterday. This 8085-based computer is an immediate predecessor to the IBM PC. It has BASIC in ROM, and two 8" floppy disk drives. I don’t have any disks or documentation for it yet, and I would like to get my hands on some of that.