B69000 Asiliant Technologies, B69000 Datasheet - Page 175

• Manufacturer Part Number: B69000
• Manufacturer: Asiliant Technologies

Specifications of B69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

14-8
XR09
read-only at I/O address 3D7h with index at I/O address 3D6h set to 09h
7-2
1
0
&+,36
7
Reserved
These bits always return the value of 0 when read.
Attribute Controller Extensions Enable
0: Allow the sub-addressing scheme used to access the attribute controller registers to remain
unchanged from the VGA standard. This is the default after reset.
1: Alter attribute controller sub-addressing scheme used to access the attribute controller registers
so that I/O Address 3C0h is used solely as the index register and I/O Address 3C1h is used as the
data port for both read and write operations.
CRT Controller Extensions Enable
0: Use only the CRT controller registers defined in the VGA standard to extend the number of bits
used to specify the timing, resolution and addressing parameters to beyond eight bits. This is the
default after reset.
1: Use only the additional CHIPS CRT controller registers to extend the number of bits used to
specify the timing, resolution and addressing parameters to beyond eight bits.
69000 Databook
I/O Control Register
6
5
Reserved
(0000:00)
Subject to Change Without Notice
Extension Registers
4
3
2
Attr Ctrl Ext
Enable
(0)
Revision 1.3 8/31/98
1
CRT Ctrl Ext
Enable
(0)
0