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Yep, sure will! Figured if you uploaded the KiCad project, I can just update the schematic accordingly once I get it figured out.

@croissantking, now that this has been fully figured out, it may be worth posting a copy of the final schematic you've derived. It looks like you're using KiCad; if so, you can export the schematic as a PDF easily, and there is also a feature to export a BOM list as an HTML document (or even...

Yes, plus the patches made to the NDRVs to remove the EEPROM ID check.

There's no reason to go out of your way to get a 512K chip, as with my patched/compressed version of the SeriTek firmware, there's no need. Though if you have 512K EEPROMs on-hand already, you may as well use them. Really makes no difference.

AM28F010 requires 12V for programming, so it can't be done on the card itself. It must be done externally using an EEPROM programmer, unfortunately.

You bet. I actually just recently upgraded the onboard CPU on my PowerMac 6500 (same architecture and basic board as the TAM) from the original 275 MHz PowerPC 603ev to a 300 MHz PPC740L G3 CPU. Since OS X doesn't work with the cache card CPU upgrades (from what I've heard, at least), this...

Odd, CPU VCORE voltage set appropriately? Otherwise there's a chance a firmware mod may need to be done, if you can get a dump of the BootROM, I can check that.

Was the chip reballed before being installed? These chips (all PPC chips, not just the 740s) have these weird not-quite-solder 0.89MM balls applied, which I have yet to figure out how to actually make solder correctly. Whenever I attempt to, they just don't make proper contact with the pads...

This is with 512K of cache installed, but the cache slot is not the same as having backside L2 cache. So I suspect it'd be even worse with the cache module removed.

This is running at 300 MHz, as shown. It originally had a 275 MHz 603ev, I set the PLL config to 300 MHz to match the rating of the PPC740 I installed.

Yep, it’s of course not going to be as fast as it would if it had backside cache, but is still somewhat of an improvement over the 603ev. Another idea I had was to make a custom interposer PCB, to adapt the 603ev BGA footprint into one of the ZIF sockets found on G3 PowerMacs, allowing you to...

This is happening because the SeriTek tool does not like the EEPROM on the card. The same occurred on normal PCI cards with certain EEPROMs when testing. You’ll need to flash via some other means, probably using Flashrom on a PC laptop with a PCMCIA slot.

I FINALLY got it figured out, well, sort of... I couldn't figure out what in my implementation was causing the issue, so I decided to make a new implementation, based off a different C implementation along with a (broken) Forth implementation I came across. With this decompression routine...

For reference, here is my now current implementation.

The driver,AAPL,MacOS,PowerPC entry does NOT show under OS X normally. This is honestly the most bizarre and annoying issue I have ever experienced. I've tested every part of the implementation individually; declaring words but doing nothing else, filling all input and output buffers, switching...

I have attached the ioreg dump from my MDD with the card installed, USB not working. My USB2.0 PCI card I have installed also does not work. I unfortunately do not have a serial adapter, so I can't get a console output that early in the boot process. I'll have to get/build one I guess for...

I tried your implementation, plus made some further changes, and it still is doing the same thing... I'll have to do some experimenting in OF and see if I can pinpoint the issue.

Yeah, I was thinking it may be a memory allocation issue... I was able to replicate the issue on my MDD (oddly it didn't happen on my Sawtooth G4, guess down to OF differences). I'll test your changes and see if it makes a difference.

Interesting... To clarify though, you are using it with just ONE card installed? Mixing a card with my patched ROM and a stock ROM will cause issues.

I updated the ROM by padding it out to 128K in size, that way it works properly with Flashrom.