19 May
1999
19 May
'99
12:15 p.m.
On Wed, 19 May 1999 allisonp(a)world.std.com wrote:
OK, the MicroVAX has the main board which is mounted solder side up. It
also has the extended memory card, a Network(?) card that connects via two
40 conductor ribbon cables. What is missing is the large - almost main
board size - board that is situated component side up beneath the main
board, and connects to it via two 40 pin headers (that run parallel to
the 50-pin and 60-pin connectors for tape SCSI and hard and floppy drives
respectively) on the main board. Is that the Video Extension board?
and have a
sort of 'matched set'. I am a bit sadder and wiser now that
I have discovered that the MicroVAX is missing a rather large daughter
board that resides beneath the motherboard in the VAXStation, and
apparently carries the HDC and SCSI controller hardware.
?????? the only difference between the MV2000 and the VS2000 is NOTHING!
Both 90% of the hardware is all on one board. The common boards
plugged into that card are the extended memory, a Network card and
a Video extension to the (additional bit planes for color). The HDC and SCSI(for tapes opnly) is on the main
board! look for the NCR
5380 and SMC 9224 40 pin chips.
Yep, I see them.
Does the position of the Berg jumper about two inches from the rear of the
BNC connector affect the functioning of the storage devices?
- don
Allison