7 Apr
2010
7 Apr
'10
3:55 p.m.
On Wed, Apr 7, 2010 at 18:17, Jules Richardson
<jules.richardson99 at gmail.com> wrote:
Sounds familiar for an A500, too - at least I recall
two ICs and some
pull-up resistors. I remember building interfaces like that so we could use
junked PC floppy drives as external drives (the prices that Commodore wanted
for 'official' external drives were insane)
Yes, and the 'trick' was actually well documented. I have in a copy
of "The Amiga System Programmer's Manual" but I seem to recall it on
Aminet as well. Basically, make sure the drives are set to DS0 (IIRC
stock PC drives are set to DS2) and then latch the disk motor line
with the drive select, so that 4 drives can sit on one cable.
Anyways quick update: the drive now works, but only on my A1000, not
the A500; same symptoms. I think the LS'38 on the A500 motherboard is
blown, too, it seems to not pull the motor line low enough.
Bummer. I'm not good at desoldering chips without potential damage to
the board.
Joe.
--
Joachim Thiemann :: http://www.tsp.ece.mcgill.ca/~jthiem