[rescue] VSIMM As (Re: Looking for a VSIMM for SS20)

[Joshua D. Boyd]

On 7/25/2022 4:25 PM, Mouse wrote:
>> Did anyone ever document what the extra 36 pounds on the VSIMM did, or for t$
> Pounds?

Drat, I meant to type pins there.

> I've always assumed the extra chip is the cgfourteen proper, that the
> motherboard contains nothing but the video electronics.  (I'm not sure
> just what the division of labour is between the VSIMM and the
> motherboard, but the MB can't have _too_ much of it or it'd be obvious.
> For example, if it used a stock RAMDAC on the MB, there'd have to be
> two of them, because it supports two cg14s.

I realized that I had never seen a Sun 501-2488 auxilliary video boards 
needed to use a second VSIMM.

I was able to find an ebay auction with pictures: 
https://www.ebay.com/itm/294506217547

It looks like analog video is coming directly from the SBUS slot.

I guess that supports the idea that the RAMDAC is on the VSIMM.

Still doesn't answer the question of the pinout of the extra pins, but 
this is mostly just idle curiosity at the moment.