VT8601 Apollo ProMedia
Revision 1.3 September 8, 1999
-112
3D Graphics Engine Registers
7HFKQRORJLHV ,QF
:H&
:H&RRQQHFW
QQHFW
Span Engine
PS1, PS2, PD1, and PD2 are used in blt and text operations to
define source and destination rectangles.
GEbase + 0 - Parameter Source 1 ....................................RW
31-28 Reserved
........................................ always reads 0
27-16 Y-coordinate Parameter Source 1 Start
High 12 bits of parameter source 1 starting address in
Y coordinate
15-12 Reserved
........................................ always reads 0
11-0 X-coordinate Parameter Source 1 Start
Low 12 bits of parameter source 1 starting address in
X coordinate
GEbase + 4 - Parameter Source 2 ....................................RW
31-28 Reserved
........................................ always reads 0
27-16 Y-coordinate Parameter Source 2 Start
High 12 bits of parameter source 2 starting address in
Y coordinate
15-12 Reserved
........................................ always reads 0
11-0 X-coordinate Parameter Source 2 Start
Low 12 bits of parameter source 2 starting address in
X coordinate
GEbase + 8 - Parameter Destination 1............................ RW
31-28 Reserved
........................................ always reads 0
27-16 Y-coordinate Parameter Destination 1 Start
High 12 bits of parameter destination 1 starting
address in Y coordinate
15-12 Reserved
........................................ always reads 0
11-0 X-coordinate Parameter Destination 1 Start
Low 12 bits of parameter destination 1 starting
address in X coordinate
GEbase + C - Parameter Destination 2 ........................... RW
31-28 Reserved
........................................ always reads 0
27-16 Y-coordinate Parameter Destination 2 Start
High 12 bits of parameter destination 2 starting
address in Y coordinate
15-12 Reserved
........................................ always reads 0
11-0 X-coordinate Parameter Destination 2 Start
Low 12 bits of parameter destination 2 starting
address in X coordinate
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