Centris 610 is a Candidate for "Dirtiest 68k Mac"

[Phipli]

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.

 

[Phipli]

djMEMC Support For Large SIMMs

For reference.

 

[olePigeon]

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.

 

[superseth]

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.

 

[Scott Baret]

At least the Centris isn't also 32-bit dirty on top of that!!