Line 550:
Line 550:
Bit0: main (?) nRESET (active low), unset to reset (when not on reset, external GPU registers at 0x10400000+ are enabled).
Bit0: main (?) nRESET (active low), unset to reset (when not on reset, external GPU registers at 0x10400000+ are enabled).
+
When this is unset VRAM is not accessible and triggers exceptions.
Bits 1..6: other nRESET bits.
Bits 1..6: other nRESET bits.