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MB86R02 'Jade-D' Hardware Manual V1.64
GMDR1 (Geometry Mode Register for Line)
Register
GeometryBaseAddress + 44
address
Bit number
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit field name
R/W
Initial value
This register sets the geometry mode at line drawing. This register is sharing hardware with
GMDR1E, so that if GMDR1 is changed, the same bit of GMDR1E is also changed.
Bit 4
BO (Broken line Offset)
Sets broken line reference position
If you want clear initial vertex only SetRegister BLPO before G_Begin and Set 1 for this bit.
(Cannot change GMDR1 within G_Begin/G_End)
0
Broken line reference position not cleared for all vertexes.
1
Broken line reference position cleared for all vertexes.
Bit 2
EP (End Point mode)
Sets end point drawing mode
Note that the end point is not drawn in line strip.
0
End point not drawn
1
End point drawn
Bit 0
AA (Anti-alias mode)
Sets anti-alias mode
0
Anti-alias not performed
1
Anti-alias performed
18-240
H
EP
AA
BO
W
W
W
0
0
0
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