Intersystems Incorporated, Ithaca New York, DPS-1, S/N MFD-0674

This Ithaca Intersystems DPS-1 S-100 Bus Z-80 System was donated by the Metachem Resins Corp. unit of the Mereco Technologies Group.

The chassis has a IA-1160 "blinky light: front panel, a Thinker Toys Wunderbuss motherboard with active terminator, an IA-2000 REV-A Z-80 CPU board, an IA-2030 REV-B 64k DRAM Memory board, an IA-2020 Diskette Controller board, and an IA-1190 Serial/Parallel Interface board. The DPS-1 system came with a Lobo Drives 8" SSSD floppy diskette chassis, a Zenith H-19 terminal S/N 423972, a DEC VT-52-NE, and a TI-810 printer.

With a little bit of fiddling we were able to get the system to boot.

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The front of the Ithaca Intersystems DPS-1.

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The inside of the Ithaca Intersystems DPS-1.

Note the Thinker Toys backplane.

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The Ithaca Intersystems IA-1160 front panel without the cover.

This is a movie showing the LEDs during a CP/M boot.

After a while the system decided not to boot any more. We reseated all of the chips. This changed the behavior, but it still would not boot. You can watch the processor copy the boot EPROM into RAM, then run the boot program, select the diskette, read data, and then go off into the weeds. We sprayed contact cleaner on all of the chips and wiggled them in the sockets. This did not improve the behavior.

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The inside of the Lobo Drive chassis showing the 8" SSSD floppy diskettes.