GIF I/O

10003000h GIF_CTRL - Control register (W)

• 0 Reset GIF
• 1-2 Unused
• 3 Temporary stop (1=stop transfers, 0=restart transfers)
• 4-31 Unused

10003010h GIF_MODE - Mode of operation (W)

• 0 Mask PATH3 (1=Mask)
• 1 Unused
• 2 Intermittent mode

When PATH3 is masked by this register and GIF DMA is ongoing, the mask applies once GIF DMA ends its transfer.

10003020h GIF_STAT - Status register (R)

• 0 PATH3 masked by GIF_MODE
• 1 PATH3 masked by VIF1 MASKP3 register
• 2 Intermittent mode activated
• 3 Temporary stop
• 4 Unused
• 5 PATH3 interrupted (by intermittent mode?)
• 6 PATH3 queued
• 7 PATH2 queued
• 8 PATH1 queued
• 9 Output path (1=transfer ongoing)
• 10-11 Active path
  • 0=Idle
  • 1=PATH1
  • 2=PATH2
  • 3=PATH3
• 12 Transfer direction (0=EE->GS, 1=GS->EE)
• 13-23 Unused
• 24-28 Data in GIF FIFO (in quadwords, max 16)
• 29-31 Unused

10003040h GIF_TAG0 (R)

• 0-31 Bits 0-31 of most recently read GIFtag

10003050h GIF_TAG1 (R)

• 0-31 Bits 32-63 of most recently read GIFtag

10003060h GIF_TAG2 (R)

• 0-31 Bits 64-95 of most recently read GIFtag

10003070h GIF_TAG3 (R)

• 0-31 Bits 96-127 of most recently read GIFtag These registers are only readable when the GIF has been paused by GIF_CTRL. For details on the GIFtag format, see GIFtags

10003080h GIF_CNT (R)

• 0-14 Backwards loop counter from NLOOP
  • Decrements to zero
• 15 Unused
• 16-19 Register descriptor in progress
  • 0=highest
  • 1=lowest
  • 2=2nd lowest
  • ...
  • 15=15th lowest
• 20-29 VU data address being transferred
• 30-31 Unused

Only accessible when GIF is paused by GIF_CTRL.

10003090h GIF_P3CNT (R)

• 0-14 Backwards loop counter from PATH3 NLOOP when PATH3 is interrupted
• 15-31 Unused

Only accessible when GIF is paused by GIF_CTRL.

100030A0h GIF_P3TAG (R)

• 0-31 Bits 0-31 of PATH3 GIFtag when PATH3 is interrupted

Only accessible when GIF is paused by GIF_CTRL.