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AFAIK, all Beige G3 ROMs work in all Beige G3 motherboards. I've never heard of a failing combination.

Yes, there were reports way back when that the Rev. C broke compatibility with some obscure brand of Wifi card, or something like that. REallly old memory. I don't recall hearing it caused problems with Tango Trio, but it is not surprising. Apple, of course, never disclosed how a C was...

Are you sure that's a Rev. C. From the chip number, I'm thinking it might be a Rev. B instead of Rev. C. The ROM Revision in Apple System Profiler is different. Trails "F2" vs. "F5", IIRC.

They pretty much look the same, except that the chips have different Apple part numbers on them, depending on version. There were some circuit board revisions with changing part numbers, but you can't tell the ROM version from the circuit board part number, as they each overlapped with...

Most (all?) of the inexpensive adapters do not have a jumper for setting master/slave. This one is pricey, but actually is built properly with a jumper. https://www.amazon.com/Ableconn-IIDE-MSAT-2-5-Inch-Converter-Aluminum/dp/B017VQT5YW?th=1 I think StarTech may have a good one as well, but...

If the IDE to SATA chip is a newer JMicron JMH330, which is fairly common, then it is always set to Master. You cannot change it to Slave by changing resistors. They also sell a JMH330S which is permanently a Slave but I've never seen one in the wild. The older JM20330 is changeable with...

Excellent work. I installed a couple of the Newlife 1's back in the day. Any chance you can track down the Outbound folks and do the same? Corey Burton (IIRC, memory is hazy) was trying to make a go of providing support for several years after they shut down.

Thank you. I have a local copy, but that was a kind offer. I'm not sure I would glorify my collection of files by calling it a "site". It's just stuff I've thrown up into on-line file space over the years for convenience as circumstances dictated.

My ISP of 25 years shut down or will soon. File is now located here: http://sphinxgroup.org/Apple_pinouts/Firmware_Module_Pinout.txt

Still looking for the delete button. POsted too soon.

@jajan547 Sorry I didn't see this thread sooner. I've been away from forums for a while. Really TL:DR summary: Look for a module with four chips on board. The chips are labeled 341S0169, 341S0170, 341S0171, 341S0172. That will work, even if it is a PowerComputing Corp. (PCC) module...

Well, everyone who had a PEx without a ROM module and requested a ROM module now has a ROM module. I'm not sure what other progress you might be asking about.

Rev. A, B or C? If you get a Rev. A ROM, then slave drives will not be supported on the built-in IDE busses. I can build you a ROM module with the C but there are a couple of issues. The lessor issue is that I'm in the USA so shipping is a bear unless we can get @mg.man to travel again...

[]NITPICK] That's not really true and has caused no end of confusion. SCSI 1 and SCSI 2 are revisions of the SCSI standard, although it's arguable that SCSI I never existed or was never codified. Unenhanced SCSI 1 and SCSI 2 are both capable of 5 MB/s performance, in theory. The SCSI...

IIRC, there are four positions for the memory chips. The trick is that the chips are 16 bits wide and 16 bit wide RAM chips are fairly rare. The other fun bit is that they're in an SOJ package (SOJ-42?). So when hunting for these FPM chips, search for that. I've seen some old 168 pin...

More than 9000 in stock. Less than $2 each. 64 pin SIMM Socekt Click on teh "with center post" link to avoid the QTY 6 minimum.

No additional logic needed if one sticks to certain 72 pin SIMMs. Specifically, one could only use Single-Banked 72-pin SIMMs. Almost all 32 MB 72 pin SIMMs (which is a fairly common size) are 2-bank. They're actually built out of two banks of 16 MB. If you rewired the SE/30 to use 72...

Yes, the Power Computing Corp. (PCC) version of the HPV card, which shipped in their Power 120 (also Power 80 and Power 100, although I've never seen those two and think they're mythical) had the modification shown in jt's later photos. PCC added a PC/VGA-style HD15 connector and a switch...

Thank you for the information on NVRAM. Sounds like I was wasting my time swapping the chips, but I do enjoy soldering.... Long thread here: https://68kmla.org/bb/index.php?threads/pex-rom-project.23568/ pEX was coincident in time with the PM G3. The pEX project was scrapped very close...

No onboard video on the S900. The S900 uses the $77D.28F2 ROM Revision which Apple used in the X500 and 7200 machines. Chips physically labeled 341S0169 - 341S0172. Because the same ROM is used on the 7500/8500 there will be code in there for CHAOS/CONTROL I don't know if that could be...