1 Feb
2012
1 Feb
'12
6:56 p.m.
On 1 Feb 2012 at 20:32, Jim Brain wrote:
1) User in another country
2) Owns an SPI peripheral he wants to talk to
3) Has wire
4) has Apple II of some vintage
5) can attach wire to various A2 ports, if needed.
Given those items, and only those items, is there anything that can be
done?
Adding a uC or a CPLD at this stage adds testing time, development
time, and it's not what we'll need for the eventual solution, so I'd
rather avoid it if possible.
Well, SPI is really little more than a shift register, so with an I/O
for data-in and one for data-out and one for clock-out, and perhaps
one for select, the rest should be little more than software.
Perhaps some level translation if the device uses 3V logic.
It wouldn't be fast, but it should work.
--Chuck