M69030 Asiliant Technologies, M69030 Datasheet - Page 263

• 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

FR19
read/write at I/O address 3D1h with index at I/O address 3D0h set to 19h
shadowed only for pipeline A
7-6
5-0
`efmp
A
B
Char Blink Duty Cycle

Character Blink Duty Cycle
Cursor Blink Rate (default = 03h)
Note: In graphics mode, the pixel blink period is fixed at 32 VSyncs per cursor blink period with 50%
duty cycle (16 on and 16 off).
69030 Databook
7
Blink Rate Control Register
(10)
These bits specify the character blink (also called 'attribute blink') duty cycle in text mode.
For setting 00, the character blink period is equal to the cursor blink period. For all other
settings, the character blink period is twice the cursor blink period (character blink is half as
fast as cursor blink).
These bits specify the cursor blink period in terms of number of VSyncs (50% duty cycle).
In text mode, the character blink period and duty cycle is controlled by bits 7-6 of this
register. These bits should be programmed to:
Bits
7 6
0 0
0 1
1 0
1 1
6
50%
25%
50% (default on reset)
75%
Character Blink Duty Cycle
5
Programmed value = ((Actual Value) / 2) - 1
not shadowed for this pipeline
Flat Panel Registers
4
Cursor Blink Rate
3
(00:0011)
2
Revision 1.3 11/24/99
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0
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