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From a tortured soul locked in a laboratory in darkest New York comes a
Frankenstein creation.
Behold! The IBM SCSI2SD!
Find a sheet of poly or something non-conductive and heat glue it on the
reverse of the SCSI2SD.
Those cans are pretty big. Lorenzo has confirmed with the SCSI2SD creator
that they are over-spec and can be reduced. I await the IBM SCSI2SD based on
the v6 SCSI2SD.
I DIMMly remember SCSI2SD below v6? as being 5MHz. If you strap that on the
short SCSI/A then it will be right at
home, SCSI bus transfer-wise. (Ed. The SCSI2SD v6 is 10MHz, I do believe.)
SCSI/A or SCSI w/cache,
5MHz SCSI bus, maximum of 5MB/s. Due to issues with SC.EXE, it may be the
fastest IBM SCSI on 8570 and 8580. Dunno if the updated SC.EXE from the XGAOPT allows the Corvette.
Corvette or Corvette Turbo
use the same card edge connector at the same relative position. It is SIMMply
amazing that IBM kept the 50 pin card edge at the same relative position for
all IBM SCSI controllers (non-RAID)... So the same physical configuration of
the card edge connector, ribbon, and IDC header will work no matter if it is a
SCSI2SD v5 on a Tribble, or a SCSI2SD v6 on a Corvette. These controllers will
do Fast/Narrow at 10MHz.
Remember, changing the SD card on an IBM SCSI controller prompts system
programs every time.
I think the Future Domain (FD) is usable with
the SCSI cable flopped over the top. Get some smaller cans, and it might fit in
the lower slot for a P70.
I was rooting about a few days ago and I saw some old stock 16? bit MCA
sockets on Mouser?
The common truth murmured in the dark is that the DBA-ESDI connector is a
stripped down MCA bus. If you are interested, think of a ribbon cable coming
out of the P70 DBA-ESDI headers, over to a MCA socket, with a FD or Patriot in
it. Add the SCSI2SD (Ed. that would require more
address lines than the 16 available on the DBA-ESDI interface).
The FD will do about 3MB/s, which beats the DBA-ESDI drive.
A small bracket could be made with a 3D printer to cradle the FD on it's
side.
For those of us in the know, a SCSI2SD with the SD socket detached and
brought out of the case, placed in a small enclosure like a smart card reader,
would rock. Unfortunately, hanging this external reader off an IBM controller
might trigger a problem if you change it with a different sized SD card.
For such a bleeding edge ideal, I would drag out a Buslogic / SDC
Fast/Narrow SCSI controller with a SCSI2SD v6 card. The SCSI2SD can handle
narrow/fast.
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