M69000 Asiliant Technologies, M69000 Datasheet - Page 176

• Manufacturer Part Number: M69000
• Manufacturer: Asiliant Technologies

Specifications of M69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XR0A
read/write at I/O address 3D7h with index at I/O address 3D6h set to 0Ah
7-6
5-4
3
&+,36
7
Reserved
These bits always return the value of 0 when read.
Endian Byte Swapping Control
These 2 bits enable and select the type of byte-swapping performed on all word and doubleword
data written to and read from the graphics controller by the CPU as follows:
Reserved
This bit always returns the value of 0 when read.
Reserved
69000 Databook
(00)
Frame Buffer Mapping Register
6
Bits
5 4
0 0
0 1
1 0
1 1
No byte swapping. This is the default after reset.
Performs byte swapping wherein byte 0 is swapped with
byte 1 and byte 2 is swapped with byte 3.
Performs byte swapping wherein byte 0 is swapped with
byte 3 and byte 1 is swapped with byte 2.
Reserved
Endian Byte Swapping
5
Subject to Change Without Notice
Control
(00)
Type of Endian Byte Swapping
Extension Registers
4
Reserved
(0)
3
Non X-late
Planar to
(0)
2
Mapping
Linear
(0)
Revision 1.3 8/31/98
1
Mapping
Paged
(0)
0
14-9