psxtrace

psxtrace reads the traces psxemu and psxe write. dump prints one as text, diff reports the first record two traces disagree on, and vram compares two VRAM dumps or converts one to an image:

PSXE_TRACE=psxe.trace PSXE_TRACE_COUNT=1000000 psxe -a -b bios.bin
psxemu --bios bios.bin --trace emu.trace --count 1000000
psxtrace diff psxe.trace emu.trace