Hard disks for MAC and applebus -- User beware.

[Info-Mac]

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From: info-mac@uw-beaver (info-mac)
Newsgroups: fa.info-mac
Subject: Hard disks for MAC and applebus -- User beware.
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Date: Fri, 13-Jul-84 15:54:43 EDT
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Posted: Fri Jul 13 15:54:43 1984
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From: imagen![email protected]

I spoke to an Apple-person at NCC Wednesday. He indicated that there
were four hard disk products out there for the MAC (I didn't go into
names). Two use direct, non-applebus connections to the MAC. One uses
an applebus-compatible connection to the MAC. One uses the `second
disk' port.

There is only one applebus port on the MAC. Thus if your hard disk (or
whatever) doesn't use an applebus-compatible protocol to talk to that
port, you can't run applebus on the MAC while that peripheral is hooked
up (applebus-compatible does not necessarily mean that it can be shared
with other macs on the ABus, just that it knows how to live in that
multi-drop environment). User beware.

Because applebus is pretty slow as nets (and hard disks) go, it is
probably the case that the applebus-compatible disk is slower to access
than the others. The disk that used the disk port seemed to me to be
the best compromise, although I don't really know the details.


- Geof Cooper
Imagen