Newsgroups: comp.robotics
Path: brunix!sgiblab!swrinde!cs.utexas.edu!uunet!hobbes!earth.armory.com!rstevew
From: rstevew@armory.com (Richard Steven Walz)
Subject: Re: SCSI ----> 8 parrallel
Organization: The Armory
Date: Sun, 3 Apr 1994 08:23:40 GMT
Message-ID: <CnoCnI.xo@armory.com>
References: <gar110-010494193503@ppp19.cac.psu.edu>
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In article <gar110-010494193503@ppp19.cac.psu.edu>,
George Risch <gar110@psu.edu> wrote:
>Hello Netters,
>
>	I want to do some robot building with my Macintosh PowerBook.
>Unfortunately Apple didn't endow the PB100 with a parrallel port (or
>fortunately?). It does have a port that is SCSI-1 compatible. I would like
>to convert this SCSI output to something like 8 bit birdirectional (ala
>Amiga) or 8 bits output and 4 input (ala IBM PC's) at a given SCSI address
>(probably 4 or 5). I think that I could have the address of the SCSI device
>set with jumpers. Therefore I think I need a supped up version of the NCR
>5380 that knows SCSI and can do the ACK and REC stuff with any additional
>IC's. Any suggestion?
>
>
>	Thanks,
>	George (gar110@psu.edu)
-------------------------------------
I don't know that you need the NCR 5380, although I have a schematic for
its use, and I think that all you must do is know the address break-out for
your port, (68000 has its I/O memory-mapped into mem locations instead of
separate I/O locations), and then manipulate the lines coming out of the
SCSI-1 to do whatever you would like! An actual SCSI port to plug in may be
overkill, and if you don't need to use your SCSI driver software, then you
can just issue direct commands to those ports, but you WILL need to know
the memory map for the port usages. Remember, you CAN look inside and
figure it out from the inner bus itself! For all I know IT might use an
NCR5380, in which case just look up its pinout and figure it out! Obtain
the addresses from the connections to the processor bus!
-Steve Walz   rstevew@armory.com

