r500/regs/gb_fifo_size.txt
2025-10-13 08:44:03 -05:00

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Field Name Bits Default Description
SC_IFIFO_SIZE 1:0 0x0 Size of scan converter input FIFO (XYZ)
POSSIBLE VALUES:
00 - 32 words
01 - 64 words
02 - 128 words
03 - 256 words
SC_TZFIFO_SIZE 3:2 0x0 Size of scan converter top-of-pipe Z FIFO
POSSIBLE VALUES:
00 - 16 words
01 - 32 words
02 - 64 words
03 - 128 words
SC_BFIFO_SIZE 5:4 0x0 Size of scan converter input FIFO (B)
POSSIBLE VALUES:
00 - 32 words
01 - 64 words
02 - 128 words
03 - 256 words
RS_TFIFO_SIZE 7:6 0x0 Size of ras input FIFO (Texture)
POSSIBLE VALUES:
00 - 64 words
01 - 128 words
02 - 256 words
03 - 512 words
RS_CFIFO_SIZE 9:8 0x0 Size of ras input FIFO (Color)
POSSIBLE VALUES:
00 - 64 words
01 - 128 words
02 - 256 words
03 - 512 words
US_RAM_SIZE 11:10 0x0 Size of us RAM
POSSIBLE VALUES:
00 - 64 words
01 - 128 words
02 - 256 words
03 - 512 words
US_OFIFO_SIZE 13:12 0x0 Size of us output FIFO (RGBA)
POSSIBLE VALUES:
00 - 16 words
01 - 32 words
02 - 64 words
03 - 128 words
US_WFIFO_SIZE 15:14 0x0 Size of us output FIFO (W)
POSSIBLE VALUES:
00 - 16 words
01 - 32 words
02 - 64 words
03 - 128 words
RS_HIGHWATER_COL 18:16 0x0 High water mark for RS colors` fifo -- NOT USED
RS_HIGHWATER_TEX 21:19 0x0 High water mark for RS textures` fifo -- NOT USED
US_OFIFO_HIGHWATER 23:22 0x0 High water mark for US output fifo
POSSIBLE VALUES:
00 - 0 words
01 - 4 words
02 - 8 words
03 - 12 words
US_CUBE_FIFO_HIGHWATER 28:24 0x0 High water mark for US cube map fifo