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It wasn't lock in in the conventional sense though. Anyone could call Motorola or a number of other companies and get 6845 CRTCs. After that every component of an MDA or CGA was available at Radio Shack except the font ROM. 100% compatible third party MDA and CGA cards and entire PC clones...

If anyone has any DuoDock DeclROMs I'd be interested in those. A little off the beaten path, but as far as I know they're still standard NuBus DeclROMs.

The difference is that PCs and Macs benefitted from a lot of third-party ASICs and FPGAs, but the platforms were not defined by those specific chips or compatible successors the way the Amiga was. And Apple/Dell/HP/Compaq weren't paying the full development costs for them the way Commodore was...

Commodore bet everything on custom hardware, which is the classic "how it started/how it's going" meme. Off-the-shelf hardware kept getting better and cheaper while custom chips kept getting more expensive. This is the same thing that killed arcade games and made game consoles go to standard...

Model-specific restore/install CD images seem to be a bit thin on the ground. I got the Q630/LC580 one from IA, and there's one for the first-gen Power Macs, but I know there are a lot of others that don't seem to be imaged yet.

Really cool!

For reference (from running the diagnostic disk in MAME).

You can diagnose bad solder joints by giving the monitor a mild thump. (Be very careful doing that with the case off though!) If the screen reacts at all from a mechanical shock, there are bad solder joints. Also, where's the purple glow coming from? A blue or purple glow from the CRT neck...

The /// doesn't have a video ROM. Text mode characters are fully programmable, like the C64 and some other machines.

On the pre-recall machines the problems weren't thermal per se, they were cheap tin contacts on the connector between the motherboard and the RAM array. (The recall changed them to higher-quality connectors, but that's a lot less sexy of a story than "Steve Jobs hated fans so the computer...

The best way would be to disassemble the driver enough to be rebuildable and replace the MAC address setting with loading it from a config file on the disk instead of the ROM. It wouldn't have to be a "showroom quality" disassembly, you could leave most of it machine-generated and just modify...

I've finally gotten the toolbox commands supported in MAME for file downloading. I did most testing with scuzEMU 0.5, but the closed source BlueSCSI "SD Transfer" program works too because I return their dumb magic ID string. Either way I can get things from the Garden into the emulation in...

It was fairly common to have drivers reject MAC addresses that didn't have the right manufacturer bytes. Even the ROM driver for the Quadras does it (it has 3 different Apple prefixes that it will allow).

It's a weird limitation because the MAC address is programmed into the chip by the driver every time you use it. So if they wrote their own driver or even disassembled and modified Farallon's they could make it fully configurable without changing the hardware.

If the voltage is high enough it'll work. I don't know what the valid range is for the 68HC05 off the top of my head, but I'd think 3 to 3.5 would probably cover it.

Right. The logic board is the issue, not the G3 (or G4!) CPU.

Honestly I ran mine for many hours in pretty high ambient temperatures and nothing bad ever happened. I did have to touch up the solder joints after many years though. If giving the monitor a good smack on the sides makes the picture react than you definitely have bad solder joints.

Here's the developer note. I haven't checked in depth but I think its the same as the one here: https://preterhuman.net/macstuff/techpubs/hardware/hardware2.html

I think there are some timing values in the MPC106 and a few other things that would need to be adjusted. Also potentially the 366 MHz would have had a newer/faster ATI chip. Differences from the developer note: - Rev A is a Rage II+DVD, Rev B & C are Rage Pro - Rev B supports both master and...

From an internal document I have, 4.5F3 is "Gossamer Speedbump", and is listed with a checksum of 78eb4234 and an MD5 of 9cc0e3e01bb02691b497d792ea3e9403. So not exactly this but close.