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Old 16th May 2021, 4:41 pm   #180
GeraldSommariva
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Join Date: Mar 2021
Location: Liphook, Hampshire, UK
Posts: 125
Default Re: The Transam Triton Personal Computer

Quote:
Originally Posted by ortek_service View Post

If all outputs do go down close to 0V OK, with pull-downs to 0V, then maybe this controller IC is fairly-OK after all, which would be rather handy.
Although maybe some of it's output-circuitry is quite fully-working, but it maybe possible to work-around that .
Having done more testing I have produced the following Output Table and its Looks like the controller is working as you predicted.

The ASCII values look correct and the shift and CTL function seam to work, I been feeding the outputs from the encoder in to a 74LS244 and reading them with by PIC processor Raspberry PI combo.
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