Product specifications

VT8601A Apollo PLE133
Revision 1.82 October 22, 2001 -90- VGA Extended Registers
Technologies, Inc.
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VGA Extended Registers – CRT Controller Indexed
CRE – CRT Module Test...................................................RW
7 Extended Memory Access Above 256KB
0 Disable ................................................... default
1 Enable
6 VGA Misc Output Register (3C2) Write Protect
0 Writes to 3C2 Allowed .......................... default
1 Write Protect 3C2
5 CRT Start Address Bit-16
4-3 Reserved ........................................alwatys reads 0
2 Interlaced Mode
0 Disable ................................................... default
1 Enable
1-0 Reserved for Test (Do Not Program).....default = 0
CR19 – CRT Interlace Control.........................................RW
7-0 Interlaced Vsync Adjust Value
CR1A – Arbitration Control 1..........................................RW
7-0 Display Queue Kill Counter .................... default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).
CR1B – Arbitration Control 2..........................................RW
7-0 High Priority Arbiter Kill Counter ........ default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).
CR1C – Arbitration Control 3..........................................RW
7-0 Low Priority Arbiter Kill Counter ......... default = 0
Controls how many requests can be accepted by the
arbiter before changing the owner to another agent
(00 disables the counter).