SCSI to IDE
Alexandre Souza - Listas pu1bzz.listas at
gmail.com
<mailto:cctalk%40classiccmp.org?Subject=Re%3A%20SCSI%20to%20IDE&In-Reply-To=
%3C04B9CB3C0CBB4169A8660B24014CB7FB%40portajara%3E>
Sat Dec 4 14:50:26 CST 2010
[snip]
Time to define DOWN TO EARTH specs and begin working :)
Greetings from Brazil,
Alexandre SOuza
[snip]
Alexandre,
The work on a SCSI to IDE and SD bridge has already started. I have a
schematic, parts list, and PCB layout ready for prototype board up on the
N8VEM wiki. Check out the thread on
vintage-computer.com forum. It has the
Z80 controller, Z53C80, and IDE plus the SD interface. An 8 MHz Z80 will
push the data plenty fast enough for early microcomputers. We've seen it
first hand with XT-IDE board, the N8VEM DiskIO board, and the S-100 IDE
interface. Connect an IDE to CF adapter and it will be a fast drive on most
any vintage system.
Low cost commercially available SCSI to IDE bridges are already available
for those with Ultra-SCSI and later so there is no need to help them. I
think the need is for the older SCSI format which *classic* computers use,
not the fancy modern stuff. An Ultra-SCSI interface does no good for an
early microcomputer with a SCSI-1 interface which I think should be the
"classic computer" audience since they need a SCSI to IDE bridge the most.
The mailing list is called "CCTALK" for a reason. That's what's pretty
much
the only thing done here. I agree with your sentiment -- I to would like to
see less "talk" and more "do". Don't listen to the naysayers or
those who
set unrealistically high expectations but refuse to actually do anything
except complain. I've been offering to help design a KiCAD schematic and/or
PCB board and/or prototype PCBs based on *anyones* design since the start of
this thread and have only gotten flamed and ignored. Maybe you'll have
better luck.
Andrew Lynch
PS, if you are planning to offer a PCB or kit, I advise you not use SMT or
you'll be assembling nearly all of them yourself. A lot of hobbyists
especially those with diminished vision struggle with even DIP/PLCC
soldering and SMT parts will just make you the assembler as well as the
designer.