I found the document one and a half year ago.
http://world.std.com/obi/Standards/scsi/
vax, 3900
--- Jules Richardson <julesrichardsonuk_at_yahoo.co.uk>
wrote:
> Hiya,
>
> has anyone got a early copy of the SCSI spec which
> just covers SCSI 1
> (i.e. 8bit bus, 5Mb/s transfers only)?
>
> I want to see if I can get the parallel port on a
> modern PC hooked up to
> one of the old SCSI/ST506 bridge boards that I have,
> but given that I
> only have 12 data out lines to play with and 5 data
> in (13 in if I
> assume a bidirectional port) things are pretty tight
> and I obviously
> need to do some loading of stuff into external
> registers.
>
> I've got some reasonable info on the SCSI protocol,
> but having a better
> idea of which signals do what (and at what time)
> would be useful.
>
> All the docs out on the web seem to be for the
> latest SCSI revision
> though (and therefore contain a lot of info that I
> don't need).
> Furthermore I only really need the low-level
> protocol now;
> software-driven higher level command structure can
> wait for a few days!
>
> cheers
>
> Jules
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Received on Wed May 26 2004 - 11:10:02 BST