Hi All,
For an up coming project I's considering using this chip, but I would like
to verify some of the hardware functions before committing to it:
I need the following functionality:
1) 8bit latched input, controlled by a line from the peripheral
2) 8bit bufferred output, controlled by a line from the peripheral
3) serial register, loaded by CBM, and shifted by the peripheral, but only
by one bit, then reset by the CBM upon next load.
The choice I'm facing is whether to use the 6522 or the 8255. The 8255
doesn't have a serial port (will need TTL chip), but has a bi-directional
mode on port A which saves on a external 74373/573 buffer that I would need
with the 6522.
Is either chip more attractive from a C64 interfacing point of view?
Regards, Nick
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