PowerMac 7500 on System 7.5.3 crashes shortly after boot

[EriolGaurhoth]

Describe the bug
As described, I'm attempting to run dingusppc with a Powermac 7500 boot rom, a 1GB HDD image, and 16MB of RAM, approximately what the system would have had upon initial release. The Extensions appear to load, the "Mac OS" logo loads fine, and then the system locks up.

To Reproduce
Steps to reproduce the behavior:

1. I run the system with this line: dingusppc --rambank1_size 8 --rambank2_size 8 --hdd_img "PowerMac7500.dsk" -r
2. The system chimes, the extensions appear and load, the "Mac OS" screen appears and loads, and finally, it does a beep, reaches a blank white box, and freezes. (see image)

Expected behavior
The system should...not freeze!

Screenshots

• Device Type: Laptop
• Host OS: Windows 11
• Host Processor: Intel i7 11800h
• Host RAM: 64GB
• Guest OS: Mac OS 7.5.3
• Guest Processor: PowerPC 601
• Guest ROM: PowerMac 7500
• Guest RAM: 16MB
• Build Date: March 31
• Version: dfea8fa

Attached here is my log.

dingusppc.log

[dingusdev]

Verified working with Power Mac 7500:
Disk Tools 8.5
System 7.5.3 Install CD

Can verify a freeze occurs with 7.5.3 install.
Notably on this:

(  19.668s)             viacuda.cpp:761   INFO| Cuda: File server flag off
(  19.669s)             viacuda.cpp:823   INFO| Cuda: Set Power-Up Alarm to 0x00000000
(  20.990s)             viacuda.cpp:880   WARN| Unsupported I2C device 0x61
(  20.990s)             viacuda.cpp:880   WARN| Unsupported I2C device 0x60
(  20.991s)             viacuda.cpp:880   WARN| Unsupported I2C device 0x60
(  20.998s)             viacuda.cpp:880   WARN| Unsupported I2C device 0x11
(  20.999s)             viacuda.cpp:880   WARN| Unsupported I2C device 0x11
(  23.185s)        grandcentral.cpp:417   WARN| mac-io_grandcentral: Unsupported DMA channel DMA_AUDIO_IN write @0c.l = 00a12200

Notably, it seems to freeze when trying to play back sound.