On the left is an Ohio Scientific Inc. (OSI) computer similar to one of the two my high school had. It has two 8 inch floppies for storage, 48 kbytes of memory and 64x32 character graphics. It's running the Mugger game my brother wrote. I also had available a space two player shoot at each other game, poker, and blackjack that I wrote. I also showed the modifications to the operating system I did. What came with the machine was quite primitive. The OSI has various symbols such as ships in its character set for games. Mugger is probably the best of the games we did. Some OSI floppy repair information and my floppy test program
On the right is a TI not quite IBM compatible which was my parents' first computer that they got around 1983. Originally it had dual 5 1/4 inch floppies and upgraded to 10 Mbyte hard drive later. It has 768 kbytes memory. I was showing the rabbit program for storing records of our show rabbit hobby and printing pedigrees and other information. I also had the show program for running rabbit shows. I wrote those programs and my mother sold them to other rabbit breeders. The computer was still being used occasionally until 1997. Information on the TI Professionals user group disks and archive of disks Also see directory of TI hard drive as last used
See our Ohio Scientific and TI Professional computer history
The TI just needed some bad memory chips replaced and the AC line (X/Y) capacitors in the power supply replaced. The clock battery was also dead but had not leaked.
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Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with. I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation.
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