17 Aug
2006
17 Aug
'06
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