On 10/05/2017 03:27 PM, Paul Berger via cctalk wrote:
I once had a Tecmar SASI adapter (I still have the
documentation and diskette) I seem to recall that it was
mostly buffers which would suggest that most of the work
was done by the device driver. The disks that went with it
where ST506 drives connected to Xebec S1410 bridge
cards. This card/device driver also supported having
multiple initiators so more than one PC could share that
massive 10, 15 or 33MB disk.
Sure, I put a SASI disk onto a CP/M system. The interface
was basically a bidirectional 8-bit port with some extra
handshake lines. The physical interface was as simple as
could be, the software was also quite simple. I used the
INIR/OUTIR instructions on the Z-80 that were pretty close
to a DMA operation.
Jon
