Super Marathon for Pippin crashes/freezes up DingusPPC

[eisnerguy1]

Describe the bug
If you try and load Super Marathon, and then select either game, it either crashes to the debugger or just freezes DingusPPC, both showing this frozen screen:

To Reproduce
Steps to reproduce the behavior:

1. Load Super Marathon with this command:
   ./dingusppc -b pippin.ROM -m pippin --gfxmem_size=4 --rambank1_size=4 --rambank2_size=4 --rambank3_size=4 --rambank4_size=4 --emmo off --cdr_img2=SuperMarathon.iso

2. Click on Marathon to have the system crash to the debugger and see this result:

2025-03-08 16:30:30.908 dingusppc[23484:13407935] +[IMKClient subclass]: chose IMKClient_Modern
2025-03-08 16:30:30.908 dingusppc[23484:13407935] +[IMKInputSession subclass]: chose IMKInputSession_Modern
(   6.510s)              ppcmmu.cpp:555   FATL| ABORT: Instruction fetch from unmapped memory at 0x84FFFF00!

Welcome to the DingusPPC command line debugger.
Please enter a command or 'help'.

FFF12C50: dingusdbg>

3. Select Marathon 2 for DingusPPC to completely freeze up, requiring to force quit DingusPPC

Expected behavior
Selecting Marathon should load Marathon and Selecting Marathon 2 should load Marathon 2

Device Information (please complete the following information):

• Device Type: Desktop
• Host OS: macOS 15.3.1
• Host Processor: Apple M3 Max
• Host RAM: 128GB
• Guest OS: Pippin OS (System 7.5.2)
• Guest Processor: PowerPC 603 @ 66 MHz
• Guest ROM: "2BEF21B7 - Bandai Pippin (Kinka 1.0).ROM" & then "Bandai Pippin Kinka ROM 1.3 KMP 2000.ROM"
• Guest RAM: 16 MB
• Build Date 08/03/2025
• Version 1453bd2

Additional context
Am I doing something wrong here/missing something? Any help would be greatly appreciated 👍🏻