VT8601 Via, VT8601 Datasheet - Page 69

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

Port 236C – Graphics AGP Global & Chan 2 Control .. RW
Revision 1.3 September 8, 1999
31-26 Reserved
25-24 Sideband Address (SBA) Standby Latency Timer
15-5 Reserved
4-3
1-0
23
22
21
20
19
18
17
16
2
7HFKQRORJLHV ,QF
High Priority Command Enable
Long Read Command Enable
System Side Channel 2 Priority
System Side Channel 1 Priority
System Side Channel 0 Priority
Reserved
Frame Buffer Channel 2 Priority
Frame Buffer Channel 1 Priority
Channel 2 Read Operation Select
Channel 2 Interrupt Enable
Channel 2 Write Target Select
:H &
:H &R R QQHFW
00 Disabled .................................................default
01 Read from Frame Buffer to AGP
10 Write from AGP to Capture / MPEG / FB
11 -reserved-
00 Write to Frame Buffer ............................default
01 Write to Capture / MPEG / FB
1x -reserved-
0
1
0
1
0
1
QQHFW
Disable ...................................................default
Enable
Disable ...................................................default
Enable
Disable ...................................................default
Enable
........................................ always reads 0
........................................ always reads 0
........................................ always reads 0
-63
Port 2370 –AGP Status..................................................... RW
Graphics AGP Configuration Registers
Port 2380 – Graphics AGP Capability Identifier ........... RW
Port 2384 – Graphics AGP Status ................................... RW
Port 2388 – Graphics AGP Command ............................ RW
31-18 Reserved
15-10 Reserved
31-0 xx
31-0 xx
31-0 xx
7-2
17
16
9
8
1
0
Channel 2 Interrupt Status
Channel 2 Busy Status
Channel 1 Interrupt Status
Channel 1 Busy Status
Reserved
Channel 0 Interrupt Status
Channel 0 Busy Status
0
1
0
1
0
1
0
1
0
1
0
1
Graphics Accelerator PCI Bus Master Registers
No interrupt pending.............................. default
Interrupt Pending
Idle
Busy
No interrupt pending.............................. default
Interrupt Pending
Idle
Busy
No interrupt pending.............................. default
Interrupt Pending
Idle
Busy
........................................ always reads 0
.................................................... default
........................................ always reads 0
.................................................... default
........................................ always reads 0
.................................................... default
VT8601 Apollo ProMedia