===== 10 DTH GPU DITHER MODULATE | BIOS 19951204 System ROM Version 3.0 11/18/96 A
BadVaddr as the group starts: 1F801DAA
Dithering (E1 bit 9; psx-spx gpu.txt:1431-1443) and texture modulation. 4x4 blocks as
red 5-bit in base 32, rows split by '/'.
GPUSTAT 5606200F at start
gouraud quad 00 dither on: 0000/0000/0000/0000
gouraud quad 01 dither on: 0000/0000/0000/0000
gouraud quad 03 dither on: 0000/0000/0000/0000
gouraud quad 04 dither on: 0000/0000/0000/0000
gouraud quad 05 dither on: 0000/0010/0000/1000
gouraud quad 07 dither on: 0001/1010/0100/1010
gouraud quad 08 dither on: 0101/1010/0101/1010
gouraud quad 0C dither on: 1111/1111/1111/1111
gouraud quad 0E dither on: 1111/2121/1111/2121
gouraud quad 10 dither on: 1212/2121/1212/2121
gouraud quad 7C dither on: ffff/ffff/ffff/ffff
gouraud quad 80 dither on: fgfg/gfgf/fgfg/gfgf
gouraud quad F7 dither on: uuuv/vuvu/uvuu/vuvu
gouraud quad F8 dither on: uvuv/vuvu/uvuv/vuvu
gouraud quad FB dither on: uvvv/vvvv/vvuv/vvvv
gouraud quad FC dither on: vvvv/vvvv/vvvv/vvvv
gouraud quad FF dither on: vvvv/vvvv/vvvv/vvvv
gouraud quad 07 dither off: 0000/0000/0000/0000
gouraud quad FF dither off: vvvv/vvvv/vvvv/vvvv
Which commands dither (dither on), colour or texel 0Eh-ish:
flat quad 28h 0E: 1111/1111/1111/1111
tile 60h 0E: 1111/1111/1111/1111
flat lines 40h 0E: 1111/2121/1111/2121
gouraud quad 38h 0E: 1111/2121/1111/2121
blended rects 64h 4x1 808080 texel 2: 2222/2222/2222/2222
blended quad 2Ch 808080 texel 2: 1212/2121/1212/2121
raw quad 2Dh texel 2: 2222/2222/2222/2222
blended quad 2Ch 707070 texel 2: 1111/2121/1111/2121
gouraud textured 3Ch 808080 texel 2: 1212/2121/1212/2121
Dither position (gouraud 0E, dither on):
drawn at local 1,0, read from 0,0: 01111/01212/01111/01212
drawn at 0,0 with offset +1, read from 0,0: 01111/01212/01111/01212
Dither and blending (gouraud 44h, dither on, background red 0Ah):
semi mode 0 crc CA1BB721
 9999
 9999
 9999
 9999
semi mode 1 crc 645896F4
 iiii
 iiii
 iiii
 iiii
semi mode 2 crc 6E8C946E
 2222
 2222
 2222
 2222
semi mode 3 crc F36DD766
 cccc
 cccc
 cccc
 cccc
Modulation grids, dither off, rows colour c (r=g=b), columns texel gray t = 0..31:
rect 64h: crc 153730D8, 0 of 8192 differ from min(31, t*c/128)
quad 2Ch: crc 153730D8, 0 of 8192 differ from min(31, t*c/128)
gouraud quad 3Ch: crc 153730D8, 0 of 8192 differ from min(31, t*c/128)
Waits that ran out: 0
Done.