B&W G3 locks up at NT Text Setup

[G-Nug85]

So the issue i am facing is the machine locks up on the part where its loading the cdrom file system. My setup is as follows hard drive as a master and CDROM as a slave on the secondary bus. I have let the system sit for a good 10 to 30 minutes and no progress.

[Wack0]

This is a hang in early NT kernel init or HAL init. What HAL did you load?

[G-Nug85]

The G3 Powermac one

[Wack0]

What CPU does your yosemite have?

[Dandumontp]

I had the same problem and by booting with a single memory stick (128 MB) it worked.

[G-Nug85]

Confirmed on my rev-A B&W the setup works fine with just 128MB of ram single module. Anything else fails

[Wack0]

Do you have mismatched sizes of RAM sticks in your yosemite? I might be setting up an incorrect memory map in that case.

[Dandumontp]

Yep. The initial configuration was 256 + 128 (the G3 Blue is very tricky with old RAM)

[Wack0]

I'd like a dump of the memory map in open firmware:

dev /memory
.properties

If there's a hole in the memory map when mismatched RAM sizes are used, I'm definitely setting the memory map up wrong.

[Dandumontp]

I will try that today.

[Wack0]

I found and fixed a couple of issues when calculating physical memory size, so try this test build:

nt_arcfw_grackle_fwonly_test20240728_1626.zip

[G-Nug85]

OK i will give this a try thanks

[Wack0]

I was doing some tests with the usb stack earlier, might have accidentally left it enabled non-working in that build, so try this one: nt_arcfw_grackle_fwonly_test20240728_1934.zip

[Wack0]

Another person with this issue discovered it was related to bad RAM, for what it's worth: https://forums.macrumors.com/threads/nt-on-powerpc-macs.2431186/post-33286633

[TechandMusic462]

Just to add, I had the issue getting stuck at "Loading CD-ROM Filesystem" on my iMac G3 Trayloader when trying to troubleshoot the HAL getting stuck (which ended up being the now-solved CUDA driver issue), when I tried changing the 512MB RAM config (2x256MB) to just 256MB (1 stick). Either stick on its own would cause it to freeze there, both are fine. No issues on Mac OS 9 in any config. It did seem more picky about memory, basically.

[Wack0]

Yeah, I fixed some issues in stage1 recently related to memory map stuff.

For the record, I have 512MB in my Lombard, and never had any issue at kernel init time.