3 ms·
JTAG doesn't really exist on the N64 hardware, it's only present on the CPU and the pins are hardwired to VCC/gnd. Even if it did work, it wouldn't be sufficie
by mips_r4300i 3y ago
JTAG doesn't really exist on the N64 hardware, it's only present on the CPU and the pins are hardwired to VCC/gnd.
Even if it did work, it wouldn't be sufficient to test the rest of the system, which doesn't have any concept of JTAG.
The other major chip (RCP) does have an undocumented test mode, it allowed the verification guys at SGI introspection into various registers/state by exposing them onto the cartridge bus as gpio. I don't think this is written down anywhere though.