[rescue] Sun 3/160 and CADDStation 32 deskside

[Alan Perry]

> On Jun 4, 2025, at 08:43, Dave McGuire via rescue <rescue at sunhelp.org> wrote:
> 
> On 6/3/25 20:26, Alan Perry via rescue wrote:
>>>  
> 
>> The 8M board that I have always returns a particular bit position as high for every address. It seems like a problem like that wouldn't be hard to figure out if I knew something about hardware.
> 
>  It's actually pretty hard to figure out.  It's a multi-layer board, and component placement is arbitrary.  You'd have to trace back the chip select lines from the address decoders and data buffers.  It's not a hardware knowledge thing, it's a needs-Sun's-design-documentation thing.

This is why I am a software/firmware guy ;)

>> As far as the 3/160, the 2M board is 501-1131.
> 
>  Have you ever seen one in the wild?

I have never seen either a 4M or a 2M board. I looked through my VME board collection and it turns out I have another 3/160 but no optional memory.

How does a CADDStation do its thing on 4M?

Do you know anything about Counterpoint memory boards (for Sun VME)? I got one of those with the CPU boards on Sat but can’t find anything about its capacity (though I guess I could see what memory parts are on it and do the math) or how to set the jumpers.

alan