IMSAI disks

From: Allison J Parent <allisonp_at_world.std.com>
Date: Mon Aug 24 17:19:08 1998

< sent us a cardboard baffle to try to get it to work but the only real
< solution for us was to use a different brand of 8" drive. Did anyone
< ever have a good experience with Calcomp floppy drives?

DEC used the mechanics and heads for the RX01 and RX02 disks with good
results. The electronics however were DEC built.

< This was pre-CP/M days, we used the floppy as a sort of fast paper tape
< replacement, keeping a manual directory of tracks which held code. I
< patched in a crude driver to the ALS-8 assembler development ROM system
< from Processor Tech to read/write memory blocks onto the floppy.

It's needs for a seperate CPU and a NEC D372 controller is familiar.
The grandfather to the design was used as a proto for a NEC TECH note
which I have. I used a version that for a NEC (NOT S100) PDA80
development system and it worked ok with good drives.

Allison
Received on Mon Aug 24 1998 - 17:19:08 BST