VT8601 Via, VT8601 Datasheet - Page 121

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

GEbase + 24 – Graphics Engine Control ....................... WO
GEbase + 28 – Graphics Engine Debug ............................ RO
Revision 1.3 September 8, 1999
31-0 Engine Module Status
6-4
3-0
7
7HFKQRORJLHV ,QF
Reset
Reserved
Debug Module Select ............................... default = 0
(See register 24 bits 3-0 above)
:H &
:H &R R QQHFW
000 None
001 Setup Engine
010 Rasterization Engine
011 Pixel Engine
100 Memory Interface
101 Cmd List Ctrl Unit
110 Cmd List Ctrl Unit
111 -reserved-
0
1
QQHFW
Normal operation ...................................default
Reset all internal registers and pointers. Reset
is performed by setting this bit to 1 and then
back to 0.
Module to Debug
........................................ always reads 0
Cmd List Start Address
Cmd List End Address
GE Register 28
undefined
RE Status
MI Status
SE Status
PE Status
n/a
-115
GEbase + 2C – Graphics Engine Wait Mask ................. RW
31-0 Wait Mask
When writing to this register, hardware will monitor
the value of M (Wait Mask & Status). If M is not 0,
the Graphics Engine (including the RE, SE, PE, and
MI) will not accept new registers from the host CPU
or AGP bus. This register is cleared by the hardware
when M = 0. Only bits 31-28, 26, 23, and 21-20 are
effective (all other bits are ignored).
VT8601 Apollo ProMedia
3D Graphics Engine Registers