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The closest thing would be the 8100 schematics. https://www.macdat.net/repair/apple_schematics.html The 6100 and 6100 Enhanced Developer Notes mention Cuda but not Egret https://leopard-adc.pepas.com/documentation/Hardware/hardware2.html

Can a ROM SIMM be created that has a switch to switch between two different ROMs while the Power Mac is running? The first ROM would be a working ROM to boot into Open Firmware. The second ROM would be the target for flashing. Boot the first ROM into Open Firmware, then flick the switch to...

The name of the ROM Flashing Utility is "Flasher (TNT 0.6)". I ran it in DingusPPC emulating a Power Mac 9600 v1. DingusPPC shows the code below after setting the RomWE bit of the ROM Timing Register. It uses 8 byte read/writes to FFC00000 and FFE00000 to probe the ROM (offset 0 and offset 2...

They are usually unnecessary, since the default conversion radix is sixteen. Alternatively, you could use hex ffc00000 400000 dump Check the current conversion radix with this: base @ .d If the conversion radix is not 16, then ffc00000 cannot be interpreted, causing the remainder of the command...

The ROMs I've uploaded the 3 new ANS ROMs to https://github.com/joevt/MacROMan There's 4 total now. They are similar to the Power Mac 9500 v2 ROM. In fact, the 2.26B6 ROM has identical first 3 MiB. 077d.28f2.1 9630c68b 045a3ff2.04a8169b.03334745.03ffe575...

According to the checksums (and doing a binary compare) the broken last ROM is identical to the first new ROM that we received (2.26b6) except for the byte 2 lane errors in the first 2 MiB of the ROM so I don't think we need to try and fix it. The broken ROM was able to get into Open Firmware...

I will post ROMs to my MacROMan fork and add some notes here later. The last ROM we're working on has problems. It has errors in byte lane 2 (8 lanes numbered 0 to 7). Byte lane 2 is the address with least significant bits = 010. 077d.28f2.1 "Boot TNT 0.1p..]" 4096 9630c68b...

Also useful would be a dump of the PCI registers of all the PCI devices since dump-device-tree shows only some of them. Here's a dropbox link with the required script for Open Firmware...

The serial cable should be a null modem cable, such as what you would use to connect a printer, like an Image Writer II serial cable. The receive at one end should connect to the transmit at the other end. Zip the captured text and attach to a post.

I'm trying to add Apple Network Server to the DingusPPC emulator. So far I can get into Open Firmware and see messages sent to the LCD. Can someone report the output of `dump-device-tree` from Open Firmware using a serial port connection?

For the Power Mac 8600/300, you could use the driver to initialize the serial port, than add your own initialization to write directly to the serial port to enable 115.2 and 240.5 kbps. Is there a way to get the addresses for the SCC registers of the CSI card using the drivers or accessing low...

I wonder if the original CPU would have the same problem?

Found this which says Mac OS 9 can be booted from USB for some Macs: https://www.macintoshrepository.org/23373-mac-os-9-2-2-boot-kit-for-booting-your-g3-g4-from-an-usb-stick

What version of Open Firmware does it have? Open Firmware 3.2.4f1 and later should be bootable by USB. See the list of Open Firmware versions at https://forums.macrumors.com/threads/question-how-powerful-of-a-graphics-card-will-work-in-a-beige-power-macintosh-g3.2303689/

Hopper doesn't decompile PowerPC. Just disassemble. You'll need something else for decompiling. IDA, Ghidra, Binary Ninja, I don't know.

I would try putting the installer into a partition of the hard drive if you can't boot CD or DVD or FireWire.

Why don't you have 10.4 or 10.5 installed? Use a screen sharing app so you can see what the OS is seeing when the display goes blank? I think 10.5 has built-in screen sharing. For 10.4, you can install a VNC Server. Install SwitchRes for Mac OS 9 or SwitchResX for Mac OS X to give you more...

I would like a 64-bit PCI-X to PCIe bridge so I could try getting more than 133 MB/s from a PCIe device in a Yosemite/Yikes (266 MB/s). The Mac with the fastest PCI-X slot is the Power Mac G5 (PCI-X) (1067 MB/s)...

I'm not sure how this would work. The VGA connector of the KVM might have a diode to select VGA mode from a Mac? But such diodes shouldn't exist on the Mac display connector of the KVM because they would interfere with those in the display and different displays have different diode arrangements...

I believe the intricacies are usually at the computer end and the display end. The KVM cable is just an extension cable. The KVM is probably not an adapter. You should be able to test continuity of all the pins between the computer side and the display side of the KVM switch with no computer...