VAXStation/MicroVAX 2000 stuff

From: Don Maslin <donm_at_cts.com>
Date: Wed May 19 19:15:24 1999

On Wed, 19 May 1999 allisonp_at_world.std.com wrote:

> > 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).

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?
 
> 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
>
>
Received on Wed May 19 1999 - 19:15:24 BST