VT8601 Via, VT8601 Datasheet - Page 95

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

GR28-27 – GPIO Control ................................................. RW
GR2A – Suspend Pin Timer ............................................. RW
GR2C – Miscellaneous Pin Control ................................. RW
Revision 1.3 September 8, 1999
15-8 GPIO Direction 7-0
7-0
6-0
5-4
7
7
6
3
2
1
0
7HFKQRORJLHV ,QF
GPIO Data 7-0.......................................... default = 0
Motion Video Port Suspend
Reserved
Reserved
Use PDINV pin as GPIO5
Reserved
Use INT# pin as PSTATUS
Tristate P35-0, DE, SFCLK, LP, FLM
Tristate ENPVEE, ENPVDD, ENPBLT
Reserved
:H &
:H &R R QQHFW
0
1
0
1
0
1
0
1
0
1
0
1
QQHFW
Read .....................................................default
Write
Disable ...................................................default
Enable
Disable ...................................................default
Enable
Disable ...................................................default
Enable
Tristate ...................................................default
Enable
Tristate ...................................................default
Enable
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
-89
GR2F – Miscellaneous Internal Control ......................... RW
4-3
7
6
5
2
1
0
PCLK Control
Reserved
Hsync Skew Control
Reserved
Double Logical Line Width
Text Mode Display FIFO Prefetch Cycles Select
Enable Display FIFO Threshold Control
0
1
0
1
0
1
0
1
0
1
VGA Compatible................................... default
PCLK equals VCLK
One skew in graphics, two skew in text . default
No skew
Disable................................................... default
Enable
Multiple of 8 .......................................... default
Multiple of 4
Disable................................................... default
Enable (can also be enabled by AR10[0])
........................................ always reads 0
........................................ always reads 0
VT8601 Apollo ProMedia
VGA Extended Registers