Looking for info on Heathkit ET-120 Microprocessor Trainer

[Dave_K.]

I recently came into possession of an ET-120 trainer, which looks to be a follow on to the ET-100. I can't find *any* information anywhere on the net. No documentation/manual, no discussions, like it almost never existed or was a short run product line?

Essentially the ET-120 (or ETW-120?) is a single self contained unit consisting of a 80186 CPU, video board (RGB and composite out), keyboard, and plug-able project board (ETB-120). When I boot it up it goes into its monitor program ET-120 Monitor v1.1 with a prompt. I'd love to find some documentation on this, and what else the monitor/rom can do.

 

[Dave_K.]

I found an "ET-100 Learning Computer Users Manual" online (likely uploaded by someone here thanks!) and it seems the monitor rom is the same, as all the commands worked the same on the ET-120!