Andreas T Jonsson 434c022b8a Restore async disk I/O protocol for USB floppy passthrough ...

Replaces the synchronous Core 0 bridge with the guest-visible async
polling protocol that was proven working on Pi 3 USB floppy boot.

Core changes:
- Disk controller now handles VXT_DISK_NOT_READY from frontends
- Pending operation state tracks multi-sector transfers
- VXTX BIOS polls port 0xB1 and reads AL/AH from 0xB2/0xB3
- Added floppy_timing / harddrive_timing INI toggles

Circle frontend:
- vfs_read/vfs_write return VXT_DISK_NOT_READY for USB handles
- Core 0 processes blocking USB jobs via usb_disk_process()
- Core 1 BIOS polling loop runs without stalls

Docs:
- Added async completion protocol to SPEC.md
- Updated STATUS.md for verified Pi 3 USB floppy boot

Default Pi config remains safe (no USB passthrough enabled).

2026-06-04 11:40:17 +02:00

..

basic.ini

Updated version number

2025-05-27 07:39:52 +02:00

raspberrypi.ini

Restore async disk I/O protocol for USB floppy passthrough

2026-06-04 11:40:17 +02:00