11 Dec
2005
11 Dec
'05
12:38 a.m.
There certainly were 3" drives that were
electrcially compatible with
5.25" ones. I have a couple of Hitachi drives that I use on a CoCo. They
were not sold _for_ the CoCo in the UK, just spare drives that I plugged in.
3" drives were common on Amstrad 8 bit machines in the UK (CPC664,
CPC6128, PCW8256, Spectrum +3 etc). IIRC, the PSW drives at least had a 26
pin
interface connector, not the 34 pin one used on 5.25" drives, but the
signals were the same, just on different pins.
They are compatible on the cpc's. I have a 3" disk in one of my pc's
for copying files. As well as a 3.5" disk on a cpc. You just need a
switch on the cable to select disk side.
Dan