[rescue] Sun 3/160 and CADDStation 32 deskside

[Alan Perry]

On 6/3/25 6:48 AM, Dave McGuire via rescue wrote:
> On 6/3/25 09:46, Alan Perry wrote:
>>>> I am restoring a ComputerVision CADDStation 32 deskside and have 
>>>> some questions.
>>>> 1. I am using a Sun 501-1164 (3/160) CPU board. It has 4M onboard. 
>>>> Will a Sun 32M memory board work with it? The memory is nominally a 
>>>> sun4 board but it works with my 3/260.
>>>
>>>   No, that board will definitely not work with a 3/100 processor.
>>>
>>>   It's not really a sun4 memory board; they were the correct (and 
>>> only) memory boards for the 3/200 processor.
>>>
>>>   For a 3/100 processor, you must use 501-1132 4MB memory boards. 
>>> There's supposedly a 2MB version, but I've never seen one in the wild.
>>
>> The 32M board is not the only memory board for the 3/260. I got my 
>> first 3/260 from a guy who did he work on it from new and then 
>> acquired it when his employer retired it. It came with an 8M board.
>
>   Yes, absolutely correct.  The 32MB board is the same design as the 
> 8MB board but using higher-density DRAMs.  I should've been more 
> thorough, but..."morning".

That's OK. Without the references handy, I can't remember much.

The 501-1206 Configuration Procedures manual from 1986must pre-date the 
32M (501-1254) board.

You wouldn't happen to know how to trace a faulty memory issue to 
particular location on the 8M board, would you? 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.

As far as the 3/160, the 2M board is 501-1131.

alan



>
>             -Dave
>