Little Big Board Computer

This was a home build based on the Pulsar Little Big Board. The machine came with an open rack with two 8″ floppy disk drives and some scary looking power supply wiring. It runs CP/M or TurboDOS.

The mains wiring and chassis earthing has been brought to a level where it no longer strikes fear. The chassis has been enclosed in clear perspex so that the authentic bespoke build and striking 8″ floppy disk drives can be enjoyed.

The drives are Y-E Data YD-180.

The Little Big Board design is well known in Australia, having been published in Electronics Today International.

Pro-Log System 20

Pro-Log was a major manufacturer of STD cards. The cards here arrived in a collection of almost 100 STD cards (thanks yet again, Andrew). I guessed by their appearance and dates that they probably went together, and later found that they were all related to a Pro-Log System 20.

The card cage is not the original unit but works fine. The system boots a ROM version of MS-DOS 3.2. The ROM card also has 128k of RAM for a RAM disk with provision for battery backup.

The 8088 processor card has 128k and with two additional 256k RAM cards the total system memory is 640k.

The system also includes a CGA card, floppy disk controller card, printer card, and a prototyping card.

Talking Electronics TEC-1

The TEC-1 was a hobby project published and sold in kit form by Talking Electronics magazine in Australia.

Such is the following of this design that descendant designs continue to be produced.

A man turned up with one at an ARC meet with one that was surplus to his requirements, and i was happy to relieve him of it. It even came with a kit logic probe from the same publication.

A particular highlight of this particular build is the mains step down transformer being housed in the cardboard box in which it was originally mailed. Nevertheless, this unit was successfully tested and tagged recently.