68000 System - Hex Display Board - PCB Complete

[Steve Crompton]

Hi,

Here is my completed Hex Display board for the 68000 Modular Computer System

It simply displays 32 bits in hex and binary - you can output 4 bytes, 2 words, or 1 long word using MOVE instructions and see visually the contents of a 68000 register or memory location(s)

Was useful as a debug tool before I got ACIA's and a Monitor ROM working

I had a wire-wrap prototype of this board early on in the design of my 68000 system and it proved very useful to me in learning about the 68000 registers and how they work so its an old friend thus I wanted to complete the design process and place it on a PCB so here it is.

Looks good if thing else :-)

[Interocitor Steve]

I like the pixel-style digits.  They work great with A-F digits too - all uppercase.  Nice job.  What bus does this board use?

=Steve.

[Steve Crompton]

Using my own 4 slot backplane  - has DIN-41612 64-Way AC Connectors.

Not cheap as people have pointed out, but cheap wasn't on the criteria list for this project.

I wanted a reliable connector that would stand up to constant insertion/removal of cards without worrying about socket or pin damage, and they do that perfectly.

When the design is a bit more mature I may consider using cheap connectors.

[Interocitor Steve]

Nice, very nice. Reminds of VME backplane connectors.  I would SLAM boards into the card cages.  Had to, there were three connectors on that bus as I remember.