VT8601 Via, VT8601 Datasheet - Page 127

• Manufacturer Part Number: VT8601
• Description: Slot-1 / Socket-370 PCI North Bridge
• Manufacturer: Via

GEbase + 3C – RE Primitive Type ................................. WO
Writing to this register signals the Graphics Engine to begin
sequential loading, but doesn’t cause anything to be drawn..
The engine will interpret the contents of this register and
decide the amount and types of parameters to expect.
Revision 1.3 September 8, 1999
31-30 Loading Target
27-26 Operation Code (RE Target Only)
20-16 Reserved
15-0 End Coordinate ....................................... default -= 0
29
28
25
24
23
22
21
7HFKQRORJLHV ,QF
Null Primitive
Last Primitive
Major Edge Parameter
Major Edge Anti-Aliasing
Minor Edge Parameter
Minor Edge Anti-Aliasing
Scan Direction
End coordinate of the primitive (inclusive).
signed integer.
:H &
:H &R R QQHFW
00 Rasterization Engine. Send bits 19-0 to the
01 Setup Engine.
1x -reserved-
00 Line .....................................................default
01 Polygon
1x -reserved-
0
1
0
1
0
1
0
1
0
1
0
1
0
1
QQHFW
RE. Sequential loading data will also be sent
to the RE.................................................default
Sequential loading data will also be sent to the
SE. Internally, a flag is set to prevent the SE
from decoding the data and sending it to the
RE. The SE will clear this flag when it is idle.
Regular Primitive ...................................default
Null Primitive
Regular Primitive ...................................default
Last Primitive
Parameter is Absent (parameter stream doesn’t
include values for the iterators) ..............default
Parameter is Present (parameter stream also
includes values for the iterators)
Don’t anti-alias major edge ....................default
Anti-alias major edge (effective only if E = 1)
Absent ....................................................default
Present
Don’t anti-alias minor edge ....................default
Anti-alias minor edge (effective only if M = 1)
Positive (Major edge = left edge)...........default
Negative (Major edge = right edge)
........................................ always reads 0
Send bits 29-0 to the SE.
12.4
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VT8601 Apollo ProMedia
3D Graphics Engine Registers