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Isn't the 128K because you installed a 128K EEPROM? The PC ROM was on the old 64K EEPROM? The PC ROM is invalid. It starts with 55AB but it should start with 55AA. The problem appears to be that bit 0 of every byte is always set. The PCIR signature was read as QCIS No. You don't have address...

Link to the post? Try decompressing the zip in modern macOS before transferring to classic MacOS?

That appears to be the correct device in Open Firmware. Both screenshots shows a ROM of 128K (in the reg property for the ROM BAR at config address 0x30). All the info comes from the PCI card (except the R2AD property), not from the ROM since the ROM has an invalid PCI header in both cases...

ati_hack_unique_9100_126_pciagp_full.rom appears to be one I created. It has an older ATY,Fcode version 1.85 and is missing AGP properties. It has been greatly modified with many words made external and given custom names. ati_8500_227_250-250_full.rom has ATY,Fcode 1.94 and has AGP properties...

The agp device is the pci host controller for the AGP slot. PowerPC Macs can have multiple PCI controllers each with their own PCI bus. The AGP graphics card is probably a child device of the agp device. agp is a devalias for the pci@f0000000 device. pci0 is another devalias for the same...

My guess is that one of those empty locations on the PCB may be for a different type of flash chip, but I have no references to base that on. Compare with other Radeon 9100s?

I copied your last image, cropped the chip, and went to Google Images to do a search for the image. It says this: It links to this Datasheet: https://www.futurlec.com/Datasheet/74LVC/74LVC574A.pdf I suppose there's two of those to buffer 16 address lines. You want to buffer 17 lines A0-A16...

68K Macs stopped at 2 MiB. The first 1MiB ROM is probably this one: 067c.15f1 1991-10 - 420DBFF3 - Quadra 700 & 900 & PowerBook 140 & 170 These are the 2MiB ROMs: 067c.30f1 1994-05 - B6909089 - PowerBook 520 520c 540 540c 067c.30f2 B57687A5 - PowerBook 550c 077d.10f3.1...

I don't know about tab completion in MPW. People made patches to MPW to add features. - PopupFuncs 2.8.1 - MPW Technicolor 0.9.6 - MPButtons 2.2 With MPW, every menu can be modified and commands added (including shortcuts). I suppose a command can help with tab completion. It could present a...

A couple Mesh documents landed in the DingusPPC discord server. - Mesh SCSI Controller 5.3 - Mesh Users Guide 2.1 The SyncParms register has the Sync Offset and Sync Period fields.

Attached. These and the HammerHead ERS were posted to the DingusPPC Discord server. They must be to survive living behind a PCI bridge. The interrupt per slot is not sufficient to determine if an interrupt is for a particular driver. The driver must check its device to see if the interrupt came...

Not sure where they come from. By "further reading", do you mean the "Related Documents" section of the HammerHead ERS? TNT System ERS - don't know TNT Control/Kaos ASIC ERS - don't know TNT Bandit ASIC ERS - yes Grand Central ASIC ERS - yes djMEMC and MEMCjr ASIC ERS - don't know MacRISC...

Looks like the ROM did not get applied correctly? Can you use a flashing utility to read the ROM? What does .properties show for the GPU in Open Firmware? Does it show that a PCI Option ROM exists and is 128K? If so, can you map it in Open Firmware and dump the hex?

Mesh does not appear to have 53CF96 registers. supermario does not appear to have any MESH code. HardwareInfoFlags in the NKHWInfo struct has a flag bit nkHWInfoFlagSlowMESH but supermario and NanoKernel has no code that sets it or uses it.

Setting SCSI speed might not be a SCSI controller register setting. It may have something to do with SDTR messages? I haven't looked at the SCSI spec. I don't think MESH or CURIO has SCSI chips used in Power Macs has a register for SCSI speed. joevt — 2026-05-18, 3:03 PM Heathrow in Gossamer...

Hammerhead ERS documents all the registers doesn't it? https://tinkerdifferent.com/threads/apple-network-server-macos-based-roms-found.4756/post-41404 Write a utility to dump the values to see how the CPU slot pins affect them (if it does at all)? Use DingusPPC emulator to follow the...

The website has Micro-Cap 5 to 12. Micro-Cap II, III, and IV are earlier versions? https://gotroot.ca/spectrum/www.spectrum-soft.com/aboutus.html I guess Micro-Cap V and Micro-Cap V 2.x exist on the website as Micro-Cap 5 (v1.3) and Micro-Cap 5 (v2.1.2). Here's a recent post from a person that...

I think that #2 should be done first (unless you already have an address name map somewhere?). Then #1 can be compared with that using a script. This would apply to the Mac Plus since there's no Apple supplied rom map for the earlier Macs. The same source code in your repository is used for 128K...

the ndrv that is in the fcode image of the PCI Option ROM is responsible for controlling a display in Open Firmware and in Mac OS (handles detecting a connected display, and setting resolutions and color depth and color palette). I extracted the ndrv from each fcode image as a .pef file for...