[sdiy] Keyboard scanner IC

[Rainer Buchty]

On Mon, 26 Jan 2009, Nathan M. Reeves wrote:

> not sure what the 6522 does, i guess it also has to do with the floppy 
> drive, which is ok...

Only one line (MO# or DRVSEL#), I guess.

(Anyone knows why all 1772-based designs require an external signal for 
driving the motor?)

Most of it go into button scanning and LED driving.

> anyone with the MCU?

Yes, I have a couple of those.

Rainer