Product specifications

VT8601A Apollo PLE133
Revision 1.82 October 22, 2001 -63- Graphics Accelerator PCI Bus Master Registers
Technologies, Inc.
Delivering Value
Delivering ValueDelivering Value
Delivering Value
Port 236C – Graphics AGP Global & Chan 2 Control ..RW
31-26 Reserved .........................................always reads 0
25-24 Sideband Address (SBA) Standby Latency Timer
23 High Priority Command Enable
0 Disable ................................................... default
1 Enable
22 Long Read Command Enable
0 Disable ................................................... default
1 Enable
21 System Side Channel 2 Priority
20 System Side Channel 1 Priority
19 System Side Channel 0 Priority
18 Reserved .........................................always reads 0
17 Frame Buffer Channel 2 Priority
16 Frame Buffer Channel 1 Priority
15-5 Reserved .........................................always reads 0
4-3 Channel 2 Read Operation Select
00 Disabled ................................................. default
01 Read from Frame Buffer to AGP
10 Write from AGP to Capture / MPEG / FB
11 -reserved-
2 Channel 2 Interrupt Enable
0 Disable ................................................... default
1 Enable
1-0 Channel 2 Write Target Select
00 Write to Frame Buffer............................ default
01 Write to Capture / MPEG / FB
1x -reserved-
Port 2370 –AGP Status......................................................RW
31-18 Reserved ......................................... always reads 0
17 Channel 2 Interrupt Status
0 No interrupt pending...............................default
1 Interrupt Pending
16 Channel 2 Busy Status
0 Idle ......................................................default
1 Busy
15-10 Reserved ......................................... always reads 0
9 Channel 1 Interrupt Status
0 No interrupt pending...............................default
1 Interrupt Pending
8 Channel 1 Busy Status
0 Idle ......................................................default
1 Busy
7-2 Reserved .........................................always reads 0
1 Channel 0 Interrupt Status
0 No interrupt pending...............................default
1 Interrupt Pending
0 Channel 0 Busy Status
0 Idle ......................................................default
1 Busy
Graphics AGP Configuration Registers
Port 2380 – Graphics AGP Capability Identifier ...........RW
31-0 xx
Port 2384 – Graphics AGP Status....................................RW
31-0 xx
Port 2388 – Graphics AGP Command.............................RW
31-0 xx