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Centris 610 is a Candidate for "Dirtiest 68k Mac"
Posted by: Phipli on 2023-04-30 02:11:24
Wait, what is this Pirate Rom
Years back bbraun made a modified ROM for the 610, 650 and 800 that recognised 64MB banks, meaning that they worked with 128MB (2x64MB bank) SIMMs better. I think dougg3 made some custom programmable SIMMs and he or others flashed the custom ROM to them.

The ROM means a 610 can address 256MB + onboard.

In the 650 / 800 there is an issue that stops you putting in 4x 128, but you can do... 128+128+64+32+onboard, if I remember correctly.

and Centris Doubler? I have heard of the Quad Doubler but not a Centris specific one?
A Quadra is just a Centris that's slipped down the alphabet.
Posted by: Phipli on 2023-04-30 02:12:49

For reference.
Posted by: olePigeon on 2023-05-01 07:33:22
Wait, what is this Pirate Rom and Centris Doubler? I have heard of the Quad Doubler but not a Centris specific one?
The Pirate ROM is the original DougG3 ROM before BMOW took over design & production. I think this one is 2 MB, with the original being 1 MB. Then later BMOW made the 8 MB ROM. The one I installed is the 3rd revision, I think. The 2nd revision I'm keeping because it's my favorite design. It has red glowing LEDs for the eyes. 🙂 1st revision only had pads for sockets which are difficult to solder on.

Visually I can't tell the difference between the Quad Doubler and Centris Doubler. They look identical. ¯\_(ツ)_/¯ The manual, however, says the Centris Doubler won't work in a Quadra, and that if you want an upgrade that works in both the Centris & Quadra, you must purchase the Quad Doubler. I don't have a Quadra in which to test this, so I'm assuming the manual is correct.
Posted by: superseth on 2023-05-01 23:21:25
Thanks for the info. I have one of the updated ROM cards for my SE/30. So it can be flashed to give more features for a Centris/Quadra as well. Interesting.
Posted by: Scott Baret on 2023-05-01 23:37:00
At least the Centris isn't also 32-bit dirty on top of that!!
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