First, Dan Burrows replied:
>
>>Anybody have a newer M9312 tech manual which describes the S1 settings for
>>this beast? The boot ROM (in U20) is a 23-774F1 and I'm trying to boot
>>RL01's and RL02's (device boot ROM -751A9). My manual is EK-M9312-TM-001,
>>so it's the first edition.
>>
>>I'm unsuccessful in getting this machine to boot even though it had been
>>said to have worked before I got it. Hardware config is the same as when I
>>got it but I want to just make sure I was told correctly that it worked.
>>Have to verify S1 switch settings as a beginning.
>
>
>S1= ON Boot to ODT 165xxx
>S1=off Boot selected device 173xxx
>s2=off for 11/24 use
>s3 through s10 are starting add.
S1 is set so that 1 thru 8 is 'OFF' and 9 + 10 are 'ON' as I found it.
-- snip --
>I am surprised you have the M9312 in that machine since you have 1 meg of
>memory. Normally you would put the boot rom on the KT24 (M7134) and use
>just a M9302 terminator.
Then Tim Shoppa replied:
>I am surprised you have the M9312 in that machine since you have 1 meg of
>memory. Normally you would put the boot rom on the KT24 (M7134) and use
>just a M9302 terminator.
Normally, yes, that's what you'd do. But it is possible to use
more than 256 K without the KT24 memory map/bootstrap module, assuming
your OS never tries to do I/O to memory past 256 K. For example,
RT-11 SJ, where the extra memory is used as a virtual (VM:) disk
drive.
Well, this machine has just a single M7891-DH with 128 KW of MOS RAM. Tim,
I assume you meant 256K *bytes*? :)
There is no KT24 in this machine. It's kinda scrawny featurewise for such a
machine. Not even a DD11-DK expansion backplane is installed. Has two
RL02's in the cabinet. Came out of Case Western Reserve university so it
could have been hacked to make a 'smaller' system for instructional use or
just for lab use. Still has the UDA50 boardset for SDI disks but no SDI
"DU" boot ROM (767A9). Who knows <shrug> . . .
Anyway, the lack of a KT24 explains why a 9312 was used instead of the 9302.
BTW: after flicking the boot switch, about how many minutes should it take
to do the prelim. tests before any evident booting action takes place? I
just see the # of bytes of memory displayed ("_at_01000000") and a few
flickers of the "Ready" light on the RL02. I waited at least five minutes
or more several times. After thinking I've waited long enough to grow old
waiting, I Halt the processor and "_at_1013" is written to the display. Could
there be a hang? (Got simple info out of my RT-11 5.1 manuals on how to
boot an 11/24 just this AM. Stumbled upon it, actually.)
Thanks for the help so far guys!
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt_at_netsync.net
Member of Antique Wireless Association
URL:
http://www.ggw.org/freenet/a/awa/
Received on Tue Dec 15 1998 - 15:21:56 GMT