===== 13 DOD DMA ODD BITS | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 1F801DAA
CHCR bits 8, 29 and 30 where psx-spx leaves them open.
Bit 30:
  GPU write 16 x 16: CHCR 01000201 494, 41000201 476, CHCR after 40000201
  SPU write 16 x 16: CHCR 01000201 17700, 41000201 17355, CHCR after 40000201
Bits 28 and 29 in SyncMode 1:
  poll    t: CHCR MADR BCR DICR
      0  1480: 20000201 0011A618 00000010 00000000
  done after 0 polls
Bit 8 in a linked list:
  16 nodes of 1, CHCR 01000401: 317, 01000501: 310, MADR 00FFFFFF CHCR 00000501 GPUSTAT 5602220A
Bit 29 in a forced burst:
  GPU SyncMode 0, CHCR 31000001: polled up to 20000 times, done; MADR start0 BCR 00000100 CHCR 30000001
Bit 8 in SyncMode 1: