Apple Keyboard microcontroller (M0116) — #8

Post #8 by Bunsen

Source Forum	68kMLA
Category	Peripherals
Post Date	Sat, 10 May 2008 - 20:32
Original URL	https://68kmla.org/bb/threads/apple-keyboard-microcontroller-m0116.13114/

Post

Of course, if there are pins which can be biased to tell it to ignore the internal ROM and start execution at an external address, and if you're able to supply a Flash chip with your own code resident, why then, it would be easy enough to read out the contents of the on-board ROM.

Oh, I see ...

The special I/O processors in the IIfx appear to have a similar pedigree.

Really? I thought they were MOS 6502s, like in the Apple II series.

/edit/ LEM agrees

With a nod to it's Apple II ancestors, the IIfx had two 6502 CPUs to manage the floppy drive(s), ADB port, and serial ports (see Technote HW 09 for more details)