>ALSO, I am about to try out (if I can get a degausser) some TK50 tapes
>in a TK70. But I want to be able to have both the TK50 and a TK70
>tape drive on line.
You certainly can!
> I have done a SYSGEN and the MUX.SYS device driver
>allows two devices, (MU0: and MU1:), but I don't have the dip switch
>settings for alternate CSR values. Can anyone help? PLEASE?
On both the TQK50 and TQK70, the CSR is set by jumpers, not by DIPswitches.
(the DIPswitches on a TK50 actually set the rev level reported by TMSCP
inquiry commands, which changed more often than the CSR's at one point!)
The default CSR is 774500. The CSR must be a multiple of 4, so the low two
bits are always zero, and the CSR must be in the I/O page, so the high
5 bits are always on. The in-between bits are set with the jumpers near
the edge connectors. Seen with the edge connectors to the bottom, the
default looks like:
XXXXXX (jumper in for CSR's starting with 77, jumper out for 76)
XXXXXX \
|
. . |- a "4"
|
. . /
XXXXXX \
|
. . |- a "5"
|
XXXXXX /
. . \
|
. . |- a "0"
|
. . /
. . jumper in if last digit is "4", out if a "0".
The "autoconfigure" CSR selection for a second TK50 in a system is 760404,
though of course this moves around if you've got other second controllers
in the systems, or a serial multiplexer, and of course RT-11 doesn't care
a damn bit about autoconfigure rules as you've got to manually configure
it anyway :-)
--
Tim Shoppa Email: shoppa_at_trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Received on Mon Sep 06 1999 - 16:00:34 BST