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Sonnet Quaddoubler project

Bolle

Well-known member
How did you go about the GAL? Was the security fuse actually set or could you read it out right away?

 

reukiodo

Well-known member
Wow, I just found this thread and am excited for the possibility!

I had looked into getting a Quadra or Centris 610 for playing around with A/UX and now finally got one. When I found out about the CPU upgrade I was intrigued and my searching led me to here. Is there still interest/progress in re-creating this CPU upgrade? I imagine that 68k chips are getting harder and harder to come by...
 

avadondragon

Well-known member
Did this project ever get anywhere? I've been hunting for one of these. Really wish I could take advantage of the full 68040 I put in my Centris 610 instead of being stuck at 20MHz.
 

avadondragon

Well-known member
I would but pushing the clock higher on the Centris board breaks the on board Ethernet which I really want to be able to use under A/UX. If A/UX wasn't so picky about hardware compatibility I would just try using an add on Ethernet adapter.
 

Phipli

Well-known member
I would but pushing the clock higher on the Centris board breaks the on board Ethernet which I really want to be able to use under A/UX. If A/UX wasn't so picky about hardware compatibility I would just try using an add on Ethernet adapter.
The link I shared shows how to fix that.
 

olePigeon

Well-known member
I have the Centris Only version of this accelerator. But it looks nearly identical. I wonder what the difference is?
 

olePigeon

Well-known member
@Phipli I dunno if it's just that. It has a warning sticker that it won't work in Quadras. You have to buy the other accelerator that works with everything.

If anyone is interested, I can take pictures of it once my replacement phone gets in.
 

avadondragon

Well-known member
@mg.man Was there a reason you decided to go for 27MHz? I figured I would try for the maximum 29.5MHz they reported to still have usable serial ports in that link. Oh I also went through my old Mac related bookmarks and found that same page I just forgot about it since whenever I originally started looking into this.
 
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mg.man

Well-known member
Was there a reason you decided to go for 27MHz?
Only because it was easy/cheap/quik to get a 13.5Mhz oscillator. I've since popped in a 16Mhz one...
20230302_001701.jpg
...but haven't done extensive testing like serial, floppy, etc. I plan to add a fan / heatsink and do the Quadra + Ethernet mods first. I have successfully booted @ 32Mhz several times... :cool:
 
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