16 Aug
2006
16 Aug
'06
9:47 p.m.
I have the opporitunity of getting some LSI 11/2 boards (LSI 11/2 processor, some memory,
serial MUX, RK floppy driver) (I think)
Couple questions: will the multiport serial work for a console or do I need a specific
"console" card?
Will these boards work in a VAX 4k BA430 chassis/backplane, or will the C/D wiring and
DSSI over C/D throw them off?
16 Aug
16 Aug
10:15 p.m.
On 8/17/06, Scott Quinn <compoobah at valleyimplants.com> wrote:
I have the opporitunity of getting some LSI 11/2 boards (LSI 11/2 processor, some
memory, serial MUX, RK floppy driver) (I think)
If it's a floppy card, it's probably an RXV11. If you had an "RK"
controller, it would most likely be the RKV11D which typically comes
in its own box with cables to the Qbus enclosure with the CPU.
The RXV11 will only work with the RX01 floppy drive or an RX02 with
the internal dip switches set to act like an RX01.
Couple questions: will the multiport serial work for a
console or do I need a specific "console" card?
A DLV11-J (the common 4-port card) has one port strapped for console use.
Will these boards work in a VAX 4k BA430
chassis/backplane, or will the C/D wiring and DSSI over C/D throw them off?
Hmm... don't know that off the top of my head, but I would think that
if anything in the chassis is loading the C/D slots, you might have a
problem with the memory refresh lines.
I have never used 18-bit Qbus equipment in a backplane that modern, so
I can't comment from experience.
-ethan
17 Aug
17 Aug
4:28 p.m.
I have the opporitunity of getting some LSI 11/2
boards (LSI 11/2
processor, some memory, serial MUX, RK floppy driver) (I think)
Couple questions: will the multiport serial work for a console or do I
need a specific "console" card?
A 'MUX' in DECs terminology meant a multi-port serial card where all the
ports effectively share the same I/O addresses (think of the DZ11 --
there's one 16 bit input for the received data, the low 8 bits are the
character and some of the top 8 bits tell you which channel it came
from). Such a card will _not_ work as the console interface.
However, in Qbus systems there's a very common 4-port serial card which
is not a Mux. Each port has it's own I/O addresses. This is the DLV11-J,
and there are specific jumper options to make port 3 (IIRC) into the
console port.
-tony
6702
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6702
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ard＠p850ug1.demon.co.uk -
compoobah＠valleyimplants.com -
ethan.dicks＠gmail.com