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I will write about it later. There were hundreds of twiggy discs imaged for museum in California and some leaked out.. after 10 years...

Once PBX has mapped it, yes, e.g. bank 6 could be mapped to 64MB to 79MB, but that 16MB would just wrap around to 0. When checking RAM...

Tried this? https://macintoshgarden.org/apps/respatch-10

Sounds about right to me (except that 81,920 KB is 80 MB). The concept is a bit like the knock-off flash disks that report their size...

Hello, can someone help me checking the correct positioning of these components on rev5 Bolle's SE/30 board? thanks in advance PCBWAY...

Interesting. So, if I'm understanding correctly, the addresses of the upper 16 or so MB wrap back around and overlap with the bottom...

Thanks. That was hopefully the missing info. I still wonder why I did not scope any outgoing data at all since my FPGA IMHO should...

Old thread but I have this problem with no boot from 7.5.3 and I have tried the resedit fix to no avail???

a good method of glueing cracks or broken off standoffs is using superglue and then sprinkle some baking soda on it, can be repeated to...

The PBX chip, which manages the physical to physical mapping, is on the Motherboard. So, if the Ram is plugged in the normal way, which...

The ”center post” one has a plastic leg in the center. You shouldn’t need that on the se/30 nor anywhere else.

Playing around in ROM code again, and I noticed a difference in behavior with System 7 and OS 8. Starting with Mac OS 8, the operating...

nice find.. your G3 740 reads 67Mhz, it needs the G3 installer software I guess...

Believe it or not, I had one of the newer ones (the II/L) die two years ago from a bad power supply!! I found a donor for it though; the...

ImageWriters II will last forever. They will be the cockroaches of the electronics world after the apocalypse.