#Data switch for SCSI
4 messages in this thread
I have heard of the Trump card, but I don't know what it is. Could you fill me
in? Is it the key to your senario? Would there be a problem if both machines
attempt to acces the same device simultaneously? Is the Mac treated as a device
by the Amiga SCSI? (Is this too many questions?)
Thanks, Rick
Rick,
No, not too many questions!
The Trump Card is just a SCSI controller card for the Amiga that is fast and
intelligent. I don't think it's all that key, although it does handle device
sharing rather elegantly! Regrettably, it's also out of production. I believe
that IVS, the company that made it, went broke a while back. Shame, because
it's really nice. There's a version called GrandSlam that crops up second hand
from time to time.
I'm sure that there would be a conflict if both machines tried to access the
same device simultaneously, although I don't think this would provoke anything
other than a failure of one machine to access the drive. If I try to access the
CD-ROM from the MAC when the Amiga is using it, I just get an error message,
but no crash.
The Mac isn't treated as a device – the Amiga knows that it's there, but I
can't access files on the Mac's hard drive. This would be possible if I used a
different cable that turns the Mac into a SCSI device, but I don't really need
it. The Syquest performs this function, as files saved to it from the Mac can
be read by the Amiga, although not vice-versa.
I hope this your questions.
John A.
On AutoPilot all the way from the U.K.
I am unclear about something. You said the Mac was at the end of your SCSI
chain. 1)Does it terminate there? 2)Is it connected to a SCSI on your Mac,
since you said the Mac is not considered a device in your hookup?
Thnks for your info
Rick
Rick,
I forgot to mention that I use an open ended terminating plug at the point
where the SCSI lead from the MAC joins the Syquest. The chain looks like this:
MAC – CD300 CD ROM – SCSI Line terminator (double ended) – Syquest External –
Quantum 250Mbyte internal – Quantum 50 Mbyte internal – Trumpcard Pro.
The Mac can read the Syquest and the CD-ROM. The Amiga can read iy's own hard
drives, and the Syquest and the CD-ROM, including certain MAC files on the
CD-ROM. (Hooray for AsimWare.)
I don't know why it works, but it does seem to!
Regards,
John A.
On AutoPilot all the way from the U.K.