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A 5V-rated chip is what you want, unless your card has an option to change VCC voltage for EEPROM to 3.3V, in which case you can use an "LV" EEPROM. You don't want an EEPROM that requires 12V for erasing and programming (such as the AM28F010), as it can only be programmed externally in an EEPROM...

1. No need to replace Flash ROM on card in most cases, though some really cheap Chinese ones these days seem to be coming with AM28F010, which needs 12V for erasing and programming, so CANNOT be programmed on-board. This EEPROM will work just fine with my patched SeriTek ROM, but must be removed...

The best thing to do is flash my patched/compressed version of the SeriTek ROM, which can fit onto the original 128K EEPROM that a lot of these Sil3112 cards have. Though this RHC one should have a 512K EEPROM installed already if I'm not mistaken. Regardless, the same compressed ROM can be...

Yep, it will work fine with that chip. Really will work with any chip 64K or larger in size, the only oddity is the “28” series EEPROMs (such as the AM28F010) require 12V for programming, so must be flashed externally with an EEPROM programmer and cannot be flashed on the card. After flashing...

What machine is it? The decompression takes less than 2 seconds to run on even the slowest of machines, so that won't be the issue. Though the SeriTek ROM is known to cause this delay on some machines.

Yeah, you can edit the PCI ROM header of the ROM image to match the values of the Adaptec card. Just requires a bit of hex editing, no checksums need to be updated after modifying that header. The strings in the actual FCode portion of the ROM cannot be modified without other work, though. You...

I know it's out of date, but I assume the "CopyROM" program linked may still work to dump old-world PPC ROMs.

I'm not sure if this works with PPC Macs, but you can give it a try: https://www.emaculation.com/doku.php/capturing_rom

I guess I should update this thread with info about this upgrade being done on PowerBooks... Short story is, it doesn't work. I tried doing the same 740 swap on a PowerBook 3400C, and while it did chime, it did nothing more than that. No video, and no boot. Re-installing the original 603...

I guess I didn't consider the fact the some clients don't have support for obtaining an IP address automatically. The way I have it set up to work is the remote access server (Shiva LanRover E/Plus) will assign each client an IP address from a range. This is a range between 192.168.2.7 and...

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.