[rescue] sun 3/60 update

[Dave McGuire]

On 5/21/25 02:58, Dan Moisa via rescue wrote:
> I've been working on a replica Sun 3/60 based on the online available 
> schematics, and I finally can report some success! I have a board fully 
> booting off network, this is what it looks like: 
> http://www.whitebearcafe.com/img/PXL_20250521_060410660.MP.jpg 
> <http://www.whitebearcafe.com/img/PXL_20250521_060410660.MP.jpg>
> 
> I left out quite a few things because I had no confidence this was going 
> to work; there were quite a few errors in the schematics. I ended up with:
> - only implementing the min required 4mb of RAM
> - left out the SCSI and Video sections
> - only put in the serial controller for A/B, left out the keyboard/mouse
> - TTL serial, I didn't implement full rs232 or modem support
> - left out the coax ethernet entirely
> - no FPU
> 
> Everything else is there. I can boot with a regular boot prom image, 
> pass all the diag tests, boot off the network and load a kernel.
> 
> I'll upload the newest version to github and arrange some things better. 
> If I make a new version the top of the wishlist is 4MB simms, not 
> putting more RAM in from the start is my main regret.
> 
> All the components were available off Digikey or eBay, with only one PAL 
> slightly on the rare side.

   This is absolutely great work Dan.  I would very much like to have 
one of these once they are ready.  Bare board (or just Gerbers!) and 
JEDEC files would be great.

   In fact I'd love to run one of the version you've got right now.

   I have enough 3/60s for myself, and we have enough at the museum. 
But I love the "immortalization" aspect of what you've done.  The 3/60 
is one of Sun's best designs, IMO, and doing this shows it great 
respect.  This is fantastic!

             -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA