M69000 Asiliant Technologies, M69000 Datasheet - Page 236

• Manufacturer Part Number: M69000
• Manufacturer: Asiliant Technologies

Specifications of M69000

• 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
7-6
5-0
Note:
&+,36
Char Blink Duty Cycle
7
Character Blink Duty Cycle
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).
Cursor Blink Rate (default = 03h)
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:
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).
69000 Databook
Blink Rate Control Register
Bits
6
7 6
0 0
0 1
1 0
1 1
50%
25%
50% (default on reset)
75%
Character Blink Duty Cycle
5
Subject to Change Without Notice
Programmed value = ((Actual Value) / 2) - 1
Flat Panel Registers
4
Cursor Blink Rate
3
2
Revision 1.3 8/31/98
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0
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