68010 Single Board Computer
Back in the 80's before 386 computers were affordable, I built a single board computer based off a 68010 with MMU to run Minix or Unix. The system featured:
- Motorola 68010 CPU running at 16 Mhz.
- MMU.
- Up to 4MB of dynamic RAM.
- Interface for up to 2 5.25 inch floppies.
- Interface to SCSI bus.
- 4 Serial ports.
- Printer port.
- Time of day clock.
- DMA data-transfers for floppy and SCSI.
- 4K bytes EPROM.
All design was done by me. DMA controller handle data transfers and refresh of dynamic memory. The system worked property, but I moved to CA before I could finish writing the device boot code. Also there was a problem with power on reset not always working. If there is interest I can scan the schematics and make them available here.
Top
view of prototype board.
Bottom
view of prototype board, this took several weeks to wire wrap!.