SSM-IO2 as a serial card

[ef1j95]

I finally got around to building up a Glitch Works reproduction SSM-IO2 as a serial I/O. It's a straightforward build based on the board manual's schematics. I added an MC1488 and MC1489 to handle the EIA interface as somewhat more period correct parts (similar to the Processor Tech 3P+S). The board (simultaneously) replicates the ports and status word of the MITS 88-SIO Rev 0 and Rev 1. I'm using it at 110 baud with a teletype. Still testing and ironing out a bug or two, but I'm interested to know if anyone else here has built one?

The SSM-IO2 board is handy in the way it provides the I/O decoding circuitry and interfaces with the data lines on the bus.

Eric

 

[geneb]

That looks busy AF. Nice job!

g.

 

[wperko]

Hi,

What is the total cost for board, components and assembly?


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[ef1j95]

Hi,

What is the total cost for board, components and assembly?


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@glitch has boards available through Tindie at $30. The rest of the parts are about $30 or so. The cost of assembly at $500 / hour is approximately $10,000.