20 Jan
2005
20 Jan
'05
9:30 a.m.
Roger Merchberger wrote:
I have a mouse for my Atari ST that's switchable
to Amiga, but I cannot
locate it right now...
I've had a look at the data sheets for HP/Agilent optical mouse chips.
The chips have a mode whereby they emulate a traditional opto-mechanical
mouse by generating X and Y quadrature signals at TTL levels. I have
a couple of cheap (?6) optical mice here that I bought with the
intention of re-wiring them to work on either Atari ST or Amiga.
I think PS/2 interfaces are considered "legacy" nowadays, so the PS/2
mice were cheaper than the USB ones. Oh, that's the other mode for
the chip: direct PS/2 interface.
--
John Honniball
coredump(a)gifford.co.uk