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    SCSI for Dummies Thread - How to properly use SCSI

    That was the Q950, not the PM9500/9600. The Q950 pre-dated SCSI Manager 4.3, which supported multiple unique SCSI busses on the same Macintosh. Later Macs, such as the PM9150 have SCSI manager built into the ROM, but the Q950 did not and was the first Mac with two SCSI controller chips. After...
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    Replacement ASC Chip (UE10) for SE30?

    Get a personalized quote before ordering anything from UTsource. Both their on-line quantity, and often, their on-line pricing is imaginary. I placed a large (>$1000) order a couple of years ago, only to get emails from them, "these parts aren't available", me: "so you don't have 37,391 of...
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    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Because of Apple's firmware. I don't know exactly how it's set up, but I believe the slots on Bandit are explicitly enumerated in the firmware, rather than "discovered" by polling. I could be wrong, but I'm pretty sure that's the case. Umax would have had to modify the firmware to put more...
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    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Yep, they're all identical physically and firmware-wise. Clock speed is controlled by which CPU card is installed.
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    Attempting to patch the SuperMac S900/Umax Pulsar's Open Firmware with "The Great Gazelle PCI Hack"

    Hmmm. A lot to comment on... Apologies if the order is poor. And let me say at the beginning that I am impressed by both of your efforts on this topic, and everyone involved in the Gazelle hack, of course. Firmware/ROM: I use two items to identify ROMs. Perhaps @joevt can comment on...
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    Ideas for Mac mod / accessory DIY kits?

    Maybe Rob's (bbraun) Mac Keyboard Interface? http://www.synack.net/~bbraun/mackbd/index.html I've never built it, but it looks interesting. The only issue is that I'm not sure if he ever shared the wiring for the final revision. He changed the design a couple of times after he wrote the...
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    Mouse alternative for Macintosh 512k

    The "@bbraun" isn't a link. Did you click on the "Rob's Mac Keyboard Interface Adapter". That works for me. Interested to know if it does not work for others.
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    Mouse alternative for Macintosh 512k

    There's also this from 2013: Rob's Mac Keyboard Interface Adapter The thing is, he gives wiring instructions for the first iteration, but then he updated the design a couple of times and didn't update the wiring description. Although it might be in the .tar file that includes the software...
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    Mouse alternative for Macintosh 512k

    I thought there was a fairly simple conversion from old serial mice (plugged into a PC's serial (COM) port). Too lazy to go searching though. I'm not sure how common old serial mice are any more.
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    6100 issues

    Heat sink removed and old heat sink grease cleaned from CPU and heat sink? At this age the heat sink compound has turned to chalk. It needs to be cleaned off and replaced. Gently. The CPU is fragile and those clip based heat sinks don't do it any favors.
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    Power Mac 7500-9600 Bus Speed Overclocking

    I've never found any public documentation of it and the NewerTech employee who told me about asked me to keep it secret -- NDAs or some such. I think it's been long enough... I wish I had asked him for those internal apps. He probably would have had to say no, but I never asked...
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    Power Mac 7500-9600 Bus Speed Overclocking

    I've had 9500 systems adn clones up to 62 MHz using a PowerBoost Pro. I think that was a PowerLogix upgrade, but maybe XLR8? It was a PPC604e upgrade though, not a G3 or G4. There are three pins in the CPU socket called ChipID which signal Hammerhead how to adjust the bus and memory...
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    Powermac 9500 & 8600 Mashup? Anyone attempted?

    Unless you get a "Kansas", AKA Macintosh 9600 Enhanced logic board, the only difference between the 9500 and the original 9600 is the power supply connector and a slight ROM upgrade. The Power Macintosh 9600 Enhanced has other changes, like removal of the onboard 512K L2 cache, a slight...
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    General G3/G4 ZIF upgrade questions

    I also wasn't thinking about laptops where activity monitoring is more likely to be a feature. In my experience, ASP always reports the wrong CPU speed on these upgrades (in a PM8500/PM9500 clone running Classic) but GuagePro or Clockometer report it correctly and always report the full...
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    General G3/G4 ZIF upgrade questions

    Thank you. The message mentions that the information is OSX centric. My experience with those upgrades has been purely in Classic OS. I didn't think about the possibility that htey had added CPU activity monitoring in OSX.
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    General G3/G4 ZIF upgrade questions

    I don't think they actually do that. At least, the version built for the X500 machines (non-ZIF) don't. You set the multiplier you want in the Powerlogix software and they configure to that speed. There's some other stuff you can set, but it's been too long. Wetware memory is not...
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    Macintosh SE/30 logicboard recreation (thread revival)

    Thousands of 64 pin sockets available here: https://www.connectorpeople.com/Connector/TYCO-AMP-TE_CONNECTIVITY/8/822019-2
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    Mac IIci: Bus arbitration: Is there any documentation available?

    A lot of the bus arbitration is going to be sort of generic 68030 bus information. Apple's documentation assumes you're already an expert at all things 68030 related (or PPC related if one is trying to understand later machines).
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    HELP! Damaged traces on UE12 pads on SE/30 board

    Not entirely luck. The NC pads always seem to be less securely adhered. Maybe just the fact that they don't have connected trace that runs under the solder mask.
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