Recent content by pom

Nice! I wish you find the time to share a tutorial :) Did you build debian yourself or did you use a prebuilt image?

Thanks for the details. Very interesting. What other hacks could be achievable? Do you reckon you could embed a bootable system ?

can you tell more about oneROM. Looking at the website, the Macintosh SE doesn’t seem to be listed among the supported machines.

https://onerom.org/

Very interesting thanks. That’s a simple solution indeed. Maybe there is a subtle way to desolder just a few pins without desoldering the chips completely. That would require to study the schematics https://macdat.net/files/pdf/apple/schematics/apple/lc475.pdf

Maybe you’re referring to this very instructive blog from @dougg3 ? https://www.downtowndougbrown.com/2023/09/revisiting-programmable-mac-rom-simms-in-quadras/ As I understand it, he discusses more a way to disable the onboard ROM

There is also a video from Ben Eater on youtube. “Running Apple 1 software on a breadboard computer (Wozmon)” Edit: however it uses a 6502 processor not a 68000

The end result is very nice! No issues with heat extraction? Edit: I realize I may have diverted from the original question quite a bit.

I’m also contemplating the idea to put a 650 in a Ilcx case or similar if I find one. Do you reckon the motherboard will fit ? Here is a video showing how to fit 650 in a 700 case

Some difficulties come my mind (but I’m not a seasoned electrician so please correct me) - complex project with a lot of components - unreliable connections - at mhz frequencies, length of wires matters if you consider signal propagation and clock synchronization - noise due to wires Your...

Nice work. This is very inspiring.

Regarding the onboard RAM, is this possible to disable it entirely, so that only the SIMM is used ? Edit: this seems possible but requires a ROM modification https://68kmla.org/bb/threads/testers-needed-modified-rom-for-lc475-q605.50704/

As a beginner in electronics, I have a question regarding some of the traces. Those that are very thin like the one for PS_ON I understand the width is calculated based on the maximum current, so a thin trace seems fine for a low current signal like PS_ON However wouldn’t you have some benefits...

I also had bad experiences on those old boards with pads being prone to lift very easily. I wonder if it be caused by exposing the pads to too much heat. What maximum temperature do you advise ?

Previous discussion https://68kmla.org/bb/threads/adapter-to-use-internal-compact-mac-screen.48640/ I also gathered some links as I plan to do the same. https://nerdhut.de/2016/06/22/macintosh-classic-crt-intro/ https://nerdhut.de/2016/06/26/macintosh-classic-crt-1/...