Apologies, I didn't realize this child-board existed until after I had already posted here...

https://macos9lives.com/smforum/index.php?topic=7829.0

...but I have done some work on this very recently. Maybe a mod can move it over for me. Will post my findings here in the future!

-UB

Hi All,

Stumbling upon his forum post a few weeks ago, I was inspired by the progress of "x7x" in solving some of the Mini's OS 9 audio issues: https://tinkerdifferent.com/threads/mac-mini-g4-sound-on-os-9-2.5173/

Using his foundational work, I did some vibe coding of my own and developed a Control Strip Module that does the following:
- automatically enables audio on boot
- provides a mute/unmute function
- auto-detects when headphones are plugged/unplugged in the 3.5mm audio jack
- displays corresponding graphics to indicate mute/speaker/headphones

During development of that CSM, however, I was annoyed by the now-infamous "1-in-5 boot mouse cursor freeze" and decided to tackle that next. It was discovered that the freeze was due a VBL-interrupt issue; I have developed a small app that sits in Startup Items that, upon reaching the desktop, will UNFREEZE the cursor, effectively neutralizing the problem.

I would like your help in testing both of these solutions further, particularly the latter to ensure that my VBL-interrupt theory with the mouse-freeze is accurate. You can review technical notes and download both solutions here:

Audio CSM - https://github.com/UnexpectedBomb/G4-Mac-Mini-Audio
Mouse freeze fix - https://github.com/UnexpectedBomb/G4-Mac-Mini-VBL-Fix

BIG thanks to Elliot Nunn for sending me in the right direction on the VBL-interrupt. When testing this, please keep track of whether you are booting into a native or non-native resolution; if a native resolution causes this freeze even a single time, that would mean I need to re-evaluate my theory.

Additional OS 9 G4 Mini projects that are currently underway:
- A true audio driver that does everything the CSM does, plus enables variable audio levels (via the slider) and fixes keyboard volume controls (such as on the A1048 keyboard)
- Drivers to enable true USB 2.0 speeds both on the Mini directly and also from PCI cards on G3/G4 towers
- Drivers to enable eSATA compatibility when using PCI cards such as the LaCie 130823
- Drivers to enable the Mini's internal Bluetooth module as well as related USB Bluetooth dongles

All feedback is welcome so I can continue to improve these solutions. Thanks in advance.

-UB

Thanks guys.
I would love to implant a silent PSU and of course a speed bump would be great.

here is an image:

 - remove screw at post #4
 - connect a 12V source to it, for example from the zip drive.

no need to solder anything, that cable you see here can simply be bought. just dont use the original screw but only a very short one.

it works at post 4 because that is also how these daughterboards get power in the quicksilvers. clever design.

that is one of the reasons why you should not change the processor in a quicksilver while the computer runs.

i have no recommendation for a source for that 12V thing, but you will find pictures or pdfs from sonnet dual procs how it looks there.

regarding the audio, it is for sure a nice solution for playing mp3s, but for recroding you will prefer other solutions, not even because of 2 channels or 16 bits, but for example for the impedance, metering, or phantompower options.

If you're considering replacing the PSU with one from another Mac, check the number of pins on the motherboard connection.
My notes say the 73/86/9600 have a 24-pin connector (TBC, I've never had a 7300). Yet the seemingly similar 7500 has a 22-pin connector..

Is there anybody out there with some experience to replace the Power Macintosh 7300/166 PSU?

pop in a g3 upgrade card ?

https://github.com/ZuluIDE/ZuluIDE-firmware/releases/tag/v2026.04.01

* PowerBook G3 Wallstreet (Series I & II)
* PowerBook G3 PDQ
* PowerBook G3 Lombard
* PowerBook G3 Pismo
* PowerBook G4 Titanium
* PowerBook G4 Aluminium 12”
* PowerBook G4 Aluminium 15” (- Early 2005)
* PowerBook G4 Aluminium 17” (- Early 2005)
* iBook G3 Clamshell/Dual USB/500/600/700/800/900
* iBook G4
* Mac mini G4

Theoretically it can emulate the hdd and the cdrom
In the above and reduce the weight dramatically if you also remove the often failing cd-rom drives

got one in the mail will report back

no experience, but i am also looking for one of these PSUs.

Can you post a firmware dump of your GeForce 3 to compare with the dumps from http://themacelite.wikidot.com/wikidownloads2 ?