28 Feb
1999
28 Feb
'99
9:53 a.m.
"emanuel stiebler" <emu(a)ecubics.com> wrote":
If i read that right, there are 10 switches on this
board. Switch 7 & 8
are defined as:
7 8
off off Arbiter
on off auxiliary 1
off on auxiliary 2
on on auxiliary 3
Switch 7 is connected to pin 4 of the J2 connector (20 pin connector)
Switch 8 is connected to pin 5 of the J2 connector.
Thanks... I'll have to recheck the manual, I guess I missed it. Now
I have to figure out what 'off' means... shorting pin 4 to what other
pin (shorted low or high).
I'm thinking of trying a KA630 as a coprocessor in a qbus pdp-11
system.
The KA650 manual mentions using the same board, but it says that only
the off-off configuration is supported. I wonder if the KA650 can
be a co-processor as well... But then, the KA650 doesn't have on-board
memory.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
28 Feb
28 Feb
10:30 a.m.
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12:56 p.m.
Megan wrote:
Thanks... I'll have to recheck the manual, I guess
I missed it. Now
I have to figure out what 'off' means... shorting pin 4 to what other
pin (shorted low or high).
Off almost certainly means leaving the pin open.
The KA650 manual mentions using the same board, but it
says that only
the off-off configuration is supported. I wonder if the KA650 can
be a co-processor as well... But then, the KA650 doesn't have on-board
memory.
Shouldn't matter that the memory isn't on board, since it's PMI memory.
The real question is whether the KA650 allows the bus arbiter to be
disabled, and provides the interprocessor doorbell interrupt.
Are there KA650 and KA655 manuals comparable to the KA630-AA CPU Module User's
Guide? I haven't been able to find one. I recently got a KA655 (M7625-BA)
with three M7622 16M RAM boards (two M7622-AT and one M7622-AP). I'm hoping
that I can just swap it with the KA630 and MS630 in my BA123. (In the BA23,
IIRC, there are only three CD slots, so I'd only be able to use two of the
memory cards.)
Anyone want to trade anything for a KFQSA (M7769)? It's a Qbus controller
for DSSI drives, of which I have none. A KZQSA would be much more useful
to me. :-)
1 Mar
1 Mar
1:22 a.m.
Off almost certainly means leaving the pin open.
Depends on whether the signal is active-low or active-high.
Shouldn't matter that the memory isn't on
board, since it's PMI memory.
The real question is whether the KA650 allows the bus arbiter to be
disabled, and provides the interprocessor doorbell interrupt.
Yeah, it would... to be able to use it, there would have to be enough
Q/CD slots to have the main processor, then the KA650 and its memory.
With an 11/83 and 4mb, that leaves no slots in a BA23. Even if I
cut back to one 2mb memory board, that only leaves one slot, which
the CPU would occupy, with no room for a memory board for it...
Are there KA650 and KA655 manuals comparable to the
KA630-AA CPU Module
User's Guide? I haven't been able to find one. I recently got a KA655
(M7625-BA) with three M7622 16M RAM boards (two M7622-AT and one
M7622-AP). I'm hoping that I can just swap it with the KA630 and MS630
in my BA123. (In the BA23, IIRC, there are only three CD slots, so I'd
only be able to use two of the memory cards.)
I went looking yesterday and found my KA650 CPU module Technical manual,
so they do exist... EK-KA650-UG
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
8:05 a.m.
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11:32 a.m.
Yeah, it would... to be able to use it, there would
have to be enough
Q/CD slots to have the main processor, then the KA650 and its memory.
With an 11/83 and 4mb, that leaves no slots in a BA23. Even if I
cut back to one 2mb memory board, that only leaves one slot, which
the CPU would occupy, with no room for a memory board for it...
Sure, but there are other backplanes with more CD slots. Doesn't the BA11-S
have eight or nine of them?
5:07 p.m.
Sure, but there are other backplanes with more CD
slots. Doesn't the
BA11-S have eight or nine of them?
Thanks... I guess since I didn't have one, I had forgotten about
them... yes, that would probably work...
*Doh!*
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
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days inactive
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