On 12/4/10, Phill Harvey-Smith <afra at aurigae.demon.co.uk> wrote:
The other thing I want this to support is 256 byte
sectors as some old
machines rely on this, a feature which is supported by some of the early
SCSI/SASI to MFM/RLL boards but very few native SCSI drives, this would
be of perticular intrest to some of the Acorn 8 bit machines.
PET as well - the D9060/D9090 drives had a SASI board and either a 5MB
or 7.5MB MFM drive inside (Tandon TM602S or TM603S) that was presented
as 256 byte blocks. The slowness you describe probably wouldn't be a
problem in this system since even the SASI interface on the "DOS
board" is implemented programmatically in 6502 code.
For the near term, it's convenient that one can drop in an ST225
(formatted to 5MB) or an ST251 (formatted to 7.5MB), but a solid-state
drive emulator would still be nice to have.
-ethan