The UNIBOARD was designed by Compacta Inc. in the UK, but manufactured in the USA by Digital Research Computers of Texas (not the Digital Research Inc. in California that produced the CP/M operating system).
This board had similar capabilities to the Z-80 based "Big Board" (also sold by Digital Research Computers of Texas). The keyboard port and video generator allowed building a very economical system. Using DMA for disk I/O avoided the need to mask interrupts during disk I/O, and allowed a 1 MHz processor to support double-density 8" drives. But it only had one serial port, and no battery-backed-up time-of-day clock. Apparently a hard disk drive adapter add-on was available, but I can't find any information on it.
The only information I could find at first was from ads and reviews in '68' Micro Journal:
But in July 2019 I made contact with someone who had built a UNIBOARD years ago, and still has the board and documentation -- Rob Storey of Melbourne, Australia. He supplied me with photos of his board and scans of the documentation, and gave me permission to use them. He also created several videos of the board and his attempts to get it working again:
|Pictures of top and bottom side
|Compacta UNIBOARD manuals: Construction & Alignment, Errata, User's guide.
|Compacta UNIBOARD schematics.
|Compacta UNIBOARD ROM images (monitor, character generator).
|Home||Other 6809||Contact||Site map|