M69000 Asiliant Technologies, M69000 Datasheet - Page 251

• Manufacturer Part Number: M69000
• Manufacturer: Asiliant Technologies

Specifications of M69000

• Lead Free Status / Rohs Status: Supplier Unconfirmed

15-36
FR49-4C
read/write at I/O address 3D1h with index at I/O address 3D0h set to 49h-4Ch
7-0
FR4D
read/write at I/O address 3D1h with index at I/O address 3D0h set to 4Dh
This register is used in FP mode (FR01 bit 1 set to 1) and when vertical line replication is enabled. The 4
bit number specifies the number of lines between replicated lines. Double scanned lines are counted. The
state machine starts stretching by using the lower nibble value. If the stretched display does not fit it uses
the next higher value. The process continues until the count is equal to upper nibble value or the display
fits. The lower nibble value must be less than or equal to upper nibble value. Set this register before FR40.
7-4
3-0
&+,36
7
7
Replication Specifications
Font lines beyond 16 are not replicated.
This register specifies the new text mode vertical stretching (along with FR4A, FR4B, FR4C).
FR49(MSB), FR4A(LSB) and FR4B (MSB), FR4C(LSB) constitute two 16 bit registers. Each of the
16 pairs of bits specify scan line replication as shown above.
FR49: Text Mode Vertical Stretching 0 MSB
FR4A: Text Mode Vertical Stretching 0 LSB
FR4B: Text Mode Vertical Stretching 1 MSB
FR4C: Text Mode Vertical Stretching 1 LSB
FP Vertical Line Replication Height High (VLRHH)
FP Vertical Line Replication Height Low (VLRHL)
69000 Databook
Vertical Line Replication Register
6
6
Text Mode Vertical Stretching Register
VLRHH
Bits
0 0
0 1
1 0
1 1
7 0
5
5
Subject to Change Without Notice
No replication
Replicate once
Replicate twice
Replicate three times
Replication Specification
Flat Panel Registers
Replication Specifications
4
4
3
3
2
2
VLRHL
Revision 1.3 8/31/98
1
1
0
0