M69030 Asiliant Technologies, M69030 Datasheet - Page 209

• Manufacturer Part Number: M69030
• Manufacturer: Asiliant Technologies

Specifications of M69030

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Supplier Unconfirmed

XR8C
read/write at I/O address 3D7h with index at I/O address 3D6h set to 8Ch
shared by both pipelines A and B
7-6
5-0
XR8E
read/write at I/O address 3D7h with index at I/O address 3D6h set to 8Eh
shared by both pipelines A and B
7-6
5-0
`efmp
A
&
B
A
&
B

Reserved
Alternate Font Location Counter Trigger Count
Reserved
Alternate Font Location Copy Read Burst Limit
69030 Databook
7
7
Reserved
Reserved
Alternate Font Location Copy Read Burst Limit
Alternate Font Location Counter Trigger Count
(00)
(00)
These bits always return the value of 0 when read.
A counter is used to keep a count of the number of vertical blanking events that occur on
the pipelines selected via bits 3 and 2 of XR88. When the counter reaches the value carried
by these 6 bits of this register, the copying of fonts in VGA-compatible locations to the
alternate blanking location is triggered.
Note: If these 6 bits are all set to 0, the copying of fonts is disabled.
These bits always return the value of 0 when read.
These 6 bits are used to specify the number of 256-bit/64-bit blocks of font data that are to
be copied each time the copying of fonts from VGA-compatible locations to the alternate
font location is triggered.
Note: Each subsequent copy operation begins immediately after the location (both at the
source and destination) at which the last copy operation ended.
6
6
5
5
Extension Registers
Alternate Font Location Copy Read Burst Limit
Alternate Font Location Counter Trigger Count
4
4
3
3
(00:0000)
(00:0000)
2
2
Revision 1.3 11/24/99
1
1
0
0
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