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A while ago, I found an SE/30 with unprotected PALs Here are the dumps from them http://bitsavers.org/pdf/apple/mac/se30

for the LW Plus completeists, there is an upgrade rom set on ebay that hasn't been dumped but I don't feel like spending $100 for it. it looks like one with just higher density roms https://www.ebay.com/itm/275994554509

It is possible to dump them. I've had an original LaserJet PCB for a while now that I've been meaning to dump. The firmware is much smaller than Apples

some progress https://oldbytes.space/@bitsavers/110125010293424011

https://oldbytes.space/@bitsavers/110115400495021849

pb100 schematic http://bitsavers.org/pdf/apple/mac/powerbook/100/PB100_Schem_Jan1991.pdf

http://bitsavers.org/pdf/apple/mac/schematic/050-0159-A_MacPlus.tif scanned from a blueprint I bought off eBay

Dale Adams designed DAFB (Dale Adams Frame Buffer)

https://computerhistory.org/blog/the-lisa-apples-most-influential-failure/ https://computerhistory.org/blog/apple-lisa-still-more-to-uncover/ https://computerhistory.org/events/happy-40th-birthday-lisa/

It won't, no matter what a random reporter claimed from quoting me out of context from a message on a private mailing list five years ago. Getting Apple to release the code means we abide by their rules. "I find the phrase 'trade secrets of the computer history museum' unreasonably amusing"...

I would love to extract whatever information is this little chip. It is a workaround for a bug in the Hammerhead memory controller.

Development flash roms existed. You needed a "Flash Gordon" Quadra PDS card to program them. I have a box with dozens of them I'd take an offer for in a private message. It's what we used for ROM development in all the first generation PCI machines

I think you're going to find it did something gross like short the D+ D- lines when you pushed the button.

At some point in the G4 life cycle, Apple removed the power on through USB functionality because it violated the USB spec.

I'm not sure what makes the Lisa's MMU a "crude hardware circuit"; what doesn't it do that would be a necessary part of the basic requirements of a "full memory management unit"? -- Lisa has a base-bounds segmented MMU, like the 68451, The SUN used a two-level segment-page mmu that allowed for...

LIR2032 batteries are rechargeable, CR2032 are not. Not that it matters, there is no charging voltage present at the battery when a Mac is plugged in, only trickle current from the AC supply which bypasses the battery.

Is there a table anywhere of the actual current drain across all of the 68K mac models with the machines unplugged?

http://bitsavers.org/bits/CMU/Macmach have fun..

The code is NOT open source, it will have a click-through license for non-profit non-redistribution use only. The notice of a code release was a press leak from the Lisa list, it was NEVER confirmed by CHM. It will happen, I can't say when. and PLEASE stop bothering the archivists trying to get...

see my twitter thread I replaced the separation rollers with tubing and the paper feed with 2GT-10 timing belt Now, I have to put it all back together and see what happens, I was waiting for a NOS fuser assembly which finally showed up last Wed.