18 Jul
2008
18 Jul
'08
10:21 a.m.
There is no chipping or logic board swapping needed to
use the 1.44 MB
floppy drive as an 800K drive. The only possible issue is the floppy
drive cable, as I wrote earlier, but the difference (IIRC) was only one
line which would be easy enough to change.
That confused me for a moment when I was looking at my Mac Plus. There
was this pin on the floppy conenctor that, on the CPU board side was
tied, IIRC, to a power line. And on the disk drive side it was clearly an
input to the elect circuitry.
Only after carefully examining the floppy drive cable did I realise it
was not a normal 20 way ribon. 1 or 2 of the 'cores' were solid plastic,
with no wire. So no connection between those pins at the ends of the cable.
IIRC, the colour of the pin-1 marker on these cables is important -- it
indicates which cores are missing.
And people wonder why I hate working on Apple stuff...
-tony