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

[Jonathan Katz]

I think we mean pins, not pounds.

"VSIMM

SPARCstation 20 systems with the SX graphics option are equipped with
a minimum of 4 Mbytes of video random access memory (VRAM).
Physically, VRAM chips are grouped together as VSIMMs.

Each VSIMM contains 4 or 8 Mbytes of video memory. Each VSIMM is a
complete high-speed, high-resolution frame buffer that plugs into a
memory slot located on the system board. A maximum of two VSIMMs may
be installed. With two VSIMMs installed, a maximum of six DSIMMs (384
Mbytes) may be installed.

Note – If a second VSIMM is installed, an auxiliary video board (AVB)
must also be installed to provide a second 13W3 video output
connector. See “Auxiliary Video Board” on page 168."

So you can't get double the horsepower out of one 13w3 with 2x VSIMMs.

My personal system has 1x VSIMM but is maxxed out on DSIMMs w/ 384M of RAM.


https://docs.oracle.com/cd/E19127-01/sparc20.ws/801-6189-12/801-6189-12.pdf

On Mon, Jul 25, 2022 at 11:29 PM Joshua D. Boyd <jdboyd at jdboyd.net> wrote:
>
> Did anyone ever document what the extra 36 pounds on the VSIMM did, or for that matter what the extra chip in addition to the VRAM is?
>
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-- 
-Jon
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