B69000 Asiliant Technologies, B69000 Datasheet - Page 147

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

11-4
GR03
read/write at I/O address 3CFh with index at address 3CEh set to 03h
7-5
4-3
2-0
&+,36
7
Reserved
Function Select
These bits specify the logical function (if any) to be performed on data that is meant to be written to
the frame buffer (using the contents of the memory read latch) just before it is actually stored in the
frame buffer at the intended address location.
Rotate Count
These bits specify the number of bits to the right to rotate any data that is meant to be written to the
frame buffer just before it is actually stored in the frame buffer at the intended address location.
69000 Databook
Data Rotate Register
Reserved
4 5
0 0
0 1
1 0
1 1
Bit
6
Data being written to the frame buffer remains unchanged, and is simply
stored in the frame buffer.
Data being written to the frame buffer is logically ANDed with the data in
the memory read latch before it is actually stored in the frame buffer.
Data being written to the frame buffer is logically ORed with the data in
the memory read latch before it is actually stored in the frame buffer.
Data being written to the frame buffer is logically XORed with the data in
the memory read latch before it is actually stored in the frame buffer.
5
Subject to Change Without Notice
Graphics Controller Registers
4
Function Select
Result
3
2
Rotate Count
Revision 1.3 8/31/98
1
0