FujiNet crashes when booting Disk II [1.5 release blocker]

[FozzTexx]

With master commit b01110f4, the FujiNet will crash after a Disk II image (DOS 3.3 System works) is mounted and the Apple II tries to boot.

10:30:05.468 > abort() was called at PC 0x40086ea3 on core 1
10:30:05.468 >
10:30:05.468 >
10:30:05.468 > Backtrace: 0x400853c5:0x3ffc29e0 0x400946b9:0x3ffc2a00 0x4009b655:0x3ffc2a20 0x40086ea3:0x3ffc2aa0 0x40086ff1:0x3ffc2ad0 0x4008708d:0x3ffc2af0 0x40234141:0x3ffc2b20 0x4022bb36:0x3ffc2e30 0x40082b1e:0x3ffc2e80 0x400829f1:0x3ffc2ea0 0x40083485:0x3ffc2ec0 0x4008616d:0x3ffc2f00 0x400947dc:0x3ffd4cd0 0x400d2f73:0x3ffd4cf0 0x4009845d:0x3ffd4d10

Steps to reproduce:

• build b01110f4 and flash to FujiNet
• Boot into CONFIG and mount an image on Disk II drive 1
• ESC from CONFIG so it mounts the image
• Boot from Disk II slot

Can reproduce with:

• Apple IIe with SoftSP v6 on Grappler+

[FozzTexx]

Ran a git bisect.

a6c4203a71413c218dfd53076b58db1f430645f7 is the first bad commit

[FozzTexx]

Reverted the bad commit and Disk II works again.

https://github.com/FozzTexx/fujinet-platformio/tree/diskii-regression