68kMLA Classic Interface
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| Sonnet Quaddoubler project | |
| Posted by: Bolle on 2020-01-28 06:47:02 How did you go about the GAL? Was the security fuse actually set or could you read it out right away? | |
| Posted by: reukiodo on 2022-04-17 21:12:47 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... | |
| Posted by: avadondragon on 2023-03-01 02:36:35 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. | |
Posted by: Phipli on 2023-03-01 02:48:39Did 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.You should be able to get to at least 28MHz with just a clock swap. Speak to @mg.man, who is in the process of doing this mod. | |
| Posted by: avadondragon on 2023-03-01 02:55:21 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. | |
Posted by: Phipli on 2023-03-01 03:07:44I 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. | |
| Posted by: avadondragon on 2023-03-01 10:35:46 Oh awesome! I was on the verge of sleep so I completely missed the link! Woops. Man I feel dumb. | |
Posted by: Phipli on 2023-03-01 10:56:29Oh awesome! I was on the verge of sleep so I completely missed the link! Woops. Man I feel dumb.I post while half asleep way too often. But at least it gives me a plausible excuse for my stupid posts when I'm awake. | |
| Posted by: olePigeon on 2023-03-01 12:52:02 I have the Centris Only version of this accelerator. But it looks nearly identical. I wonder what the difference is? | |
Posted by: Phipli on 2023-03-01 12:55:55I have the Centris Only version of this accelerator. But it looks nearly identical. I wonder what the difference is?Chip grade? | |
| Posted by: olePigeon on 2023-03-01 12:57:28 @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. | |
Posted by: mg.man on 2023-03-01 13:16:42@mg.man ... is in the process of doing this modI've only swapped the oscillator so far... but I'll leave this here :   😊 | |
Posted by: Phipli on 2023-03-01 13:21:06I've only swapped the oscillator so far... but I'll leave this here :Wow! 27MHz and you haven't even put the clock in the socket yet! Awesome! 😉 😛 | |
| Posted by: mg.man on 2023-03-01 13:22:09 I know... I did have to stare at it for a good five minutes. 😉 | |
| Posted by: avadondragon on 2023-03-05 16:39:52 @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. | |
Posted by: mg.man on 2023-03-05 20:08:49Was 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...  ...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... 😎 | |
| Posted by: itomato on 2024-09-22 07:19:20 Are there gerbers? You’d help the NeXT people a bunch, and we could easily get together on a PCB job… | |
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