18 Mar
2004
18 Mar
'04
1:43 p.m.
Ethan Dicks <dickset(a)amanda.spole.gov> wrote:
For the unaware, the difference between a VAXstation
2000 and a
MicroVAX 2000 is the plastic badge on the front, sometimes an
add-on framebuffer in the VS2000, and the position of a jumper
that identifies the CPU type as one vs the other (KA610 vs KA620?)
No, it's KA410-A vs. KA410-B, though I don't remember which is which.
KA610 is MicroVAX I.
KA620 is something I've heard about, but never figured out exactly what it was.
It was some kind of slightly hobbled KA630, wasn't it? Maybe a KA630 w/o FPU?
Does anyone know? I'm quite curious, as that's a gap in my VAX knowledge and
such gaps bother me. :-)
The firmware is the same, as is the default behavior
when loading VMS
The jumper (readable via the CFGTST_MULTU bit in the Configuration and Test
Register) tells the firmware and OS how to talk to the console. If MULTU=1,
send/receive ASCII to/from SLU port 0 at 9600 baud. If MULTU=0, set SLU port 0
to 4800 baud instead, except LK201 keycodes instead of ASCII coming from it, and
output must be scribbled on the bitmap display.
MS (right in the process of coding MV/VS 2000 & 3100 support for Quasijarus)