Posted By
Hypex
on 2017-08-10
11:05:30
|  Re: Possible 8501 replacement kit?
I wonder if it would have helped if C= used the same layout as the 6510, since it has just one extra port line.
If you look at a 7501/8501 pin layout you will see I/O P5 missing. Which doesn't make sense. Except in putting the clock and data lines at the top in the same position as the C64.
Then in the follow up 8502 P5 is back but P7 is missing! We can't win! It's like C= really stuffed things up for us.
Perhaps if they mapped the serial port to TED or elsewhere it would have helped.
And just to make matters worse reboots like the WDC 6502 are based on the obsolete model and not the popular 6510 with an I/O port.
Perhaps FPGA would be best. Even if it isn't like a real CPU. Or a traditional one.
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