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  1. P

    Calling all ROMs! Collecting DeclROM data

    There is some code in the PDM ROM that looks for a predefined signature in the DeclROM to see if one of the Apple video cards is installed in the PDS (aka VDS) slot...
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    Calling all ROMs! Collecting DeclROM data

    Many thanks! I wonder how this card is recognized by the system software without a proper DeclROM.
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    Calling all ROMs! Collecting DeclROM data

    Does anyone have DeclROM dumps for the Apple HPV cards used in the Nubus Power Macintosh 6100/7100/8100?
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    Is there a way to increase the 136MB RAM limit in the Power Mac 6100 and 7100

    I would love to learn more about that extra chip. Is it an off-the-shelf IC or an ASIC?
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    Difference between IDE controller on 1997 beige G3 and 1998 beige G3

    You're right with that 8.4GB barrier on Beiges. I did some research on this issue. Here my results: both Beige ROM revisions I have dumps for contain ATALOAD driver. This is actually the same old code as found in some Power Macintoshes and Power Books with default IDE support like PM 5200 or PB...
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    Disassemble Apple 24x ATAPI CD-ROM

    Does anyone know how to disassemble Apple 678-0136 (Panasonic CR-585-B) ATAPI CD-ROM drive? Its controller board probably needs recapping. But I'd also like to take a closer look at the ICs and eventually dump the firmware. I suspect that the PCB is held by the tray motor - see those fat...
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    x86 card revival thread

    Many thanks! The dump you've attached indeed contains the declaration ROM required for emulation. FYI, I created a branch in my DingusPPC repository dedicated to PC card emulation: pc-compat The last commit there contains initial code for loading the declaration ROM and initializing the on-card...
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    Getting an AppleSauce

    Disk Copy images can't store low level details of a floppy disk so they can't be used for preserving copy protected games. That's why a2r, WOZ and a couple of other formats exist. Copy protection software usually violate the low level floppy formats on purpose in order to make protected disks...
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    x86 card revival thread

    Interesting thread! BTW, can someone provide me with the dump of the declaration ROM of a Houdini II card? My DingusPPC emulator is about to emulate a Power Macintosh 6100. I'd like to attempt at Houdini emulation someday. Such a thing wouldn't have any other value than preserving the original...
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    Pin slot on G3 Whisper Perch?

    @Phipli Indeed, awesome! Thank you for the clarification! I wonder which device actually uses the PCI slot in the PERCH connector?
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    Pin slot on G3 Whisper Perch?

    Is that J5 on the left side of the above photo?
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    Pin slot on G3 Whisper Perch?

    I wonder if that big 112-pin connector on the personality cards actually carries PCI signals. The AIO service manual says it does not. If that's true I'm asking myself why it has so many pins? The only way to figure it out is to take a closer look at a child card intended to be plugged in there...
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    PM 8600 shuts down unexpectedly

    I don't mean to sound arrogant but I still can't believe that those units aren't serviceable. It might be not easy or cheap but they are still standard switching PSUs so it should be possible to repair them. We may need to make a good repair guide first. There are really advanced tech guys...
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    PM 8600 shuts down unexpectedly

    Not especially a 8600 PSU, but I successfully recapped the Astec PSU from my Power Macintosh 6100. I got a good guidance at the Badcaps forum: https://www.badcaps.net/forum/showthread.php?t=62455 The most interesting topics discussed there are the choice of the replacement caps as well as...
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    Difference between IDE controller on 1997 beige G3 and 1998 beige G3

    All Beige G3 ROMs I've seen so far contain Open Firmware drivers as well as native drivers for soldered on-board ATI GPUs. Otherwise, those chips would not be recognized at all.
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    Difference between IDE controller on 1997 beige G3 and 1998 beige G3

    @trag Thank you for reposting the link to your ROM pinouts.👍 AFAIK, pin 122 of the Beige ROM DIMM tells whether 64bit burst access ROM is installed. "0" (low) means burst ROM is present...
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    "Catalyst" vs. "Tsunami" vis-a-vis CPU daughtercard compatibility.

    CPU daugthercard slot sounds like a non-standard, machine-specific connector. AFAIK, Apple Catalyst boards don't offer something like that. While the Hammerhead memory controller provides some multiprocessing support there is nothing comparable in Platinum. Moreover, Catalyst-based boards come...
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    "Catalyst" vs. "Tsunami" vis-a-vis CPU daughtercard compatibility.

    Which slot is your CPU card is meant to be put into? IIRC, a Catalyst logic board doesn't have any PDS or similar. It has a ROM SIMM slot instead, see the annotated logic board photo here. I can only speak for original Apple boards...
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    Difference between IDE controller on 1997 beige G3 and 1998 beige G3

    Can you boot it into Open Firmware and dump the device tree node for Heathrow?
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    Difference between IDE controller on 1997 beige G3 and 1998 beige G3

    Do we need new ROM SIMMs for that or is it possible to reflash old ones? BTW, I remember seeing a Wiki page with pinouts for various PowerMac ROM SIMMs. It looks like the page has disappeared. I can't find it anymore. IIRC, it was created by @trag but I'm not sure...
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