v0.3.0

Debugging & GDB

• add GDB server for remote debugging and CPU control (-gdb)
• add GDB hardware watchpoint support (r, w, a)
• set GDB target architecture to MIPS and fix server stability
• fix GDB server nil pointer reference on exit

CPU & MMU / TLB

• fix TLB userspace refill handling (require TLB entry for KUSEG addresses)
• fix TLB invalid exception vector and CP0 register sync (BadVAddr, EntryHi, Context)
• rotate CP0 Random on TLBWR to prevent refill handler entry overwrite
• fix ERL KUSEG physical mapping and store handling on clean TLB pages
• fix XBurst UserLocal and COP1 support
• fix user RDHWR TLS access ($29)
• add rotate (ROTR, ROTRV) and unaligned memory instruction coverage (LWL, LWR, SWL, SWR)

Storage & MSC Controller

• fix guest boot stalls by adding MSC interrupt emulation
• support mounting custom SD card images via -sd flag
• fix card detection timeout logic and SD response wire layout
• fix MSC interrupt line routing, response word reads, and timeout logic

Peripherals & Devices

• fix TX ISP interrupt wiring (resolves guest kernel panic during module load)
• decouple SC2336 sensor from I2C controller
• fix I2C sensor probe
• fix UART interrupt line emulation for non-blocking console input
• fix SFC byte FIFO reads
• fix DWC2 reset probe and gadget config
• fix GMAC reset and MDIO no PHY response

CLI & Runtime

• add raw terminal mode with signal handling
• add -halt-pc flag to pause at target instruction address
• make -cycles flag optional in CLI and update Makefile

Full Changelog: v0.2.0...v0.3.0

v0.2.0

Boot Progress

• Boots further into Linux device initialization.
• Linux SFC probe now detects the SPI flash correctly:
  the id code = 856017, the flash name is P25Q64H
• MTD partitions are now created from the kernel command line.

SFC

• Fixed SFC DMA completion interrupt routing through the INTC.
• Fixed stale SFC_MEM_ADDR reuse across transfers.
• Added JEDEC ID handling for P25Q64H.
• Improved SFC status, FIFO, DMA, interrupt, write-enable, program, and erase behavior.
• Added regression coverage for status-read followed by JEDEC-read.

Devices

• Improved MSC interrupt/status behavior.
• Added or refined minimal models for early boot devices such as I2C, GMAC/MDIO, EFUSE, OST, DDRC, and DDRP.

Debugging

• Added better SFC tracing hooks:
  • T23EMU_TRACE_SFC_IRQ=1
  • T23EMU_TRACE_SFC=1
  • T23EMU_TRACE_SFC_LINES=<n>
• Added -trace-from support for starting instruction traces near the interesting boot window.
• Improved README with current boot status, run examples, debug flags, and todo list.

Full Changelog: v0.1.0...v0.2.0

v0.1.0

Full Changelog: https://github.com/HritikR/t23emu/commits/v0.1.0