Edit:
SP1 use EXI hardware register which is implemented here in dolphin source code.
apploader reversed give us debug parameters present in GCM (DVD boot info ...) which could help to parameter debug mod.
When debuger is started it's set to BBA (2 BBA EXI devices implemented in the dolphin source code: TAP & XLINK_KAI). Also there is dolphin emu python bindings for CPU/IA dev with memory R/W API.
SP1 use EXI hardware register which is implemented here in dolphin source code.
apploader reversed give us debug parameters present in GCM (DVD boot info ...) which could help to parameter debug mod.
When debuger is started it's set to BBA (2 BBA EXI devices implemented in the dolphin source code: TAP & XLINK_KAI). Also there is dolphin emu python bindings for CPU/IA dev with memory R/W API.