Ithaca Intersystems DPS-1

Functional front panel and z80 board. Pictured running the port FF test program testing input and output to port 0xFF. Note the corresponding programmed output LEDs to the Address-Programmed Input

Serial No. MFD-1107

See the clear vinyl bubbled up? I'm not sure if that was part of the shipping that you peel off, or a protective layer meant to be a permanent part of the system. Needs attention RSN.

Byte Magazine January 1982 Vol 7 no 1

I have a Intersystems Model 950 set of disk drives working too. I've got a bit of RTFM to do first before trying to boot any media I may have.

Intersystems Model 950 disk drives

I removed all the boards and the front panel (FP) board before testing the power supply. It was rock solid.

Operating

DPS-1 boot video

Check out this YouTube video of the DPS-1 booting from eight inch double sided double density Shugart floppy disk drives.

Images

Boards

• 

  MPU-80 IA-2000 Rev B

• 

  IA-2030 64K Dynamic Ram Rev B

• 

  FDC 2 IA-2020 Rev C

• 

  IA-30 6 SIO Rev 0

Detail of key lock (in case I rekey)

The chassis has threaded attached standoffs. Quite a lot easier to reassemble this FP than the Imsai FPs. Rock solid power supply voltage tested with my EEVBlog meter.

Lot's of options on this FP

Resources

Manuals

I found these manuals here at https://amaus.net/static/S100/intersystems/

• Ithaca Intersystems Z80 CPU Manual 1977
• Ithaca Intersystems Hard Disk Adaptor
• Ithaca Intersystems Front Panel
• Ithaca Intersystems FDC-2 Disk Controller Manual
• Ithaca Intersystems FDC-2 Bootstrap
• Ithaca Intersystems 64K DRAM Rev 0 Manual 1980
• Ithaca Intersystems Series II MPU-80

Found at the Internet Archives

• Ithaca Standard BIOS Helpful information for boot.

Other DPS-1 sites

• Ricm Computer Museum
• Old Computers .com
• PC Museum Collection
• Ithaca Audio, Intersystems - Retro Technology S-100 Herb Johnson
• Intersystems S-100Computers.com