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At https://forums.macrumors.com/threads/nt-on-powerpc-macs.2431186/post-33669034 , @Rairii said the NT drivers are for UHCI (USB 1.1) but Macs usually use OHCI ( USB 1.1) or EHCI (USB 2.0) I wonder if you could insert a UHCI PCI card for NT?

The code for my DumpNameRegistry app can be modified to read/write XPRAM for PowerPC Macs in classic Mac OS. On New World Macs, PRAM/XPRAM is stored in a NVRAM partition named "APL,MacOS75" so you need code to find the partition. There's probably an API specifically for modifying XPRAM so you...

Some XPRAM notes at https://68kmla.org/bb/threads/skipping-the-startup-memory-test.50699/post-570896

bitsavers website has PowerSurge Flash ROM pictures and schematics. http://bitsavers.org/pdf/apple/powerpc/PowerSurge/ROM_Flasher/

Maybe you need something from here? https://gona.mactar.hu/ATI_Mac/ Search for 9200 and follow the recommendations.

On New World Macs, NVRAM is stored on the same flash chip as the ROM. The ROM is a flash chip and therefore can be modified. On Old World and New World Macs, NVRAM is 8KiB and there's a section reserved for PRAM settings and a section reserved for NVRAM settings and a section reserved for non...

Here's the Open Firmware Extender I've been working on (only for Open Firmware 2.4) 1) Search product/install_of_extender2.4.txt for load ide/disk and change the partition number (currently 15) to the partition number (in decimal) of a HFS Standard partition on the master IDE drive of the first...

Remind me, what Mac, OS, GPU, miniDP-to-HDMI adapter, cables, and display are you using? Power Macs don't have DisplayPort so a miniDP to HDMI conversion isn't useful.

I wonder if that PCI bracket was cut and stamped or if it was cut, stamped, and then cut again for the smaller radius.

You could design a 3D printed mini DIN holder. Print it out of plastic or metal. Make it as thick as you like so it can't break or sandwich the mini DIN holder between the PCI bracket and a metal plate (if you don't want to expend the effort to make a mating radius in the metal plate). PCI slot...

The PCI slot cover needs 3 or 4 holes. One big hole for the miniDIN. One small hole (beveled) for the existing screw. Two holes for the stiff bit of sheet metal (two holes so it doesn't rotate). Attach with machine screws (and nuts if the PCI plates are not threaded). Instead of wedging, use a...

Get the ROM checksums from Open Firmware to see if it's an exact match to the Apple ROM? https://tinkerdifferent.com/threads/apple-network-server-macos-based-roms-found.4756/post-41390

Can the backside of a PCI bracket be made to have the same shape as the backside of the cutout for a modem jack to receive the bracket of your mini-DIN-8? If the mini-DIN-8 is bolted to a bracket, un-bolt it from that bracket and bolt it to a PCI bracket? My idea was, if you could not figure...

Dumping the entire 8K of NVRAM is overkill. Setting the entire 8K is probably dangerous. In Mac OS X, use the nvram command to view, change, or create nvram variables. In Open Firmware, use printenv and setenv. For the nvramrc variable, use nvedit, arrow keys to move up/down lines, additional...

This looks like something you could attach to a PCI bracket (if it's not too wide?): https://vetco.net/products/pan-md-67000-9s_9_pin_mini-din_female_panel_mount_jack The 9th pin is for Geoport. 8-pins should be sufficient. Maybe have a look at JamPort? http://alexhixon.com/jamport/index.html...

Unzipping "6500 Bridge FW Patch.zip" on modern macOS puts the resource fork in a separate file. The zip doesn't appear to include FinderInfo (it assumes all the FinderInfo exists in the resource fork)...

Make a serial connection to the modem port of the Power Mac 6500. On the other computer, startup a serial terminal app. Boot into Open Firmware, gather some info with this command. dev / ls unselect-dev " devalias" evaluate " printenv" evaluate dump-device-tree words Maybe try without the...

I'm working on a method to load fcode images from disk for PCI cards. It's currently only for Open Firmware 2.4 but can be adapted to other Open Firmware versions. It won't work for PCI cards that read their own ROM which is probably what the fcode for this SATA card does to load the real NDRV...

@Arbee , from your dumps, it appears the 4KiB DeclData is in a separate rom chip (341-0607-A.bin) than the 1MiB data. Therefore, SlotsGrab should not be used to grab the ROM because the DeclData uses only byte lane 3 while the rest of the memory space may be using all 4 byte lanes (32-bits)...

#3 only has 5 pins. #5 has 8 pins. Check continuity to see if the 5 pins are the same in both?