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Recent content by trag

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    Mac OS 7.1 drivers for USB 2.0 & FireWire 800

    Heh, just quoted you on that. But only to mention that that is also my recollection from the explanation in the original thread when the software was originally developed.
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    Mac OS 7.1 drivers for USB 2.0 & FireWire 800

    Third party ATA cards used SCSI hooks for their drivers. Hence IDE/ATA busses show up as SCSI busses when one uses SCSI utilities on the Mac. I don't know how Apple handled support for built-in IDE/ATA busses.
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    My SE/30 hates 16mb ram sticks

    Yes, at less than $1 per chip, one must ask whether it's worth the time to test, vs. just replace the lot. Excellent point, techknight.
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    My SE/30 hates 16mb ram sticks

    Those do look iffy. Also, check those vias through the board to confirm they actually conduct from one side of the board to the other. My IIci had some vias chewed by capacitor goo that looked okay, but were actually corroded through. Also, don't ignore Techkight's advice. He has far more...
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    Apple Network Server 500/132

    There's a request on LEMSwapList for AIX 4.14 or 4.15 for the ANS. I don't know if that's related to anyone on this thread, so thought I'd mention it. You might want to join forces with that poster.
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    My SE/30 hates 16mb ram sticks

    Keep in mind it may be labeled A11 or A12, depending on whether the DRAM address bus starts numbers with A0 or A1. And this is the address line(s) between the memory controller and the DRAM SIMMs. Not the main CPU address bus. The easiest way to find it is probably to get a pinout of the...
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    Convert IDE Zip, CD-ROM, etc. to LVD-SCSI with IBM aCard AEC-7722

    I haven't done any work on this project in the last few weeks. For a while I was waiting for heat sinks to chase hte reliability problems and more recently, I'm obsessing over my 2021 taxes to get everything where it needs to be.
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    Convert IDE Zip, CD-ROM, etc. to LVD-SCSI with IBM aCard AEC-7722

    I don't know if the 7222 will work with a ZIP drive becasue I don't know if the ZIP drive presents itself as a SCSI storage device (hard drive) or as an ATAPI device. Without a firmware hack-date the 7222 will only support optical/ATAPI devices. After you hack/update the firmware, it will...
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    My SE/30 hates 16mb ram sticks

    Could be that capacitor goo damaged/shorted the A12 line to the RAM slots. That address line wouldn't be used on 4MB and smaller SIMMs but is needed on 16MB.
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    Identify Bad RAM Chip(s)

    It was good stuff. I couldn't remember that Bank A needs to be populated. But we just don't know what level of detail folks asking for help need, so when there's time, I try to provide excessive detail. :)
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    Identify Bad RAM Chip(s)

    To expand on what LaPorta wrote, while you can't test with 7 out of 8 SIMMs installed, you can test with 4 SIMMs installed. So start by removing the RAM in Bank B and test. If it works, then the bad stick is one of the oens you removed. If it fails, then it's one of the sticks still in the...
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    Will this SCSI terminator work plugged into the logic board?

    It shouldn't matter which end is plugged in, it's providing a connection of a certain resistance between the bus signals and a fixed voltage at that point in the bus.
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    IDE cards compatible with ATAPI?

    If I remember correctly, I had an ATA DVD-ROM drive connected to a VST Ultra-66 card years ago. I currently have a DVD-RW drive connected to an Acard 6820M, which pretty much guarantees it would work fine with a 6880M as well. The only difference between the two is that the 6880M has on-board...
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    Need help designing a PCB/Recreating one.

    Which machine does the ROM go with? A number of ROM modules have already been designed, so the work may already be done.
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    Wombat (650, 800) board overclocking limitations

    @cy384 Interesting that your photos show that your board still has a 88916DW55 installed. Do you think it would help to step up to a DW70 or DW80? I'm actually kind of hoping that the dW55 works just as well as the other two faster rated parts. Somewhere along the way I ended up with a reel...
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