Mitsubishi Electric Apricot LS Pro, Техническое описание оборудования

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Chapter 4
Chapter 6
Memory and I/O Usage
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
LS PRO HARDWARE TECHNICAL REFERENCE 5/25
CL-GD542X Extension registers
The CL-GD542X video controllers have a number of extension registers. These
registers are accessed via the index and data registers of the standard VGA CRT
Controller, Sequencer and Graphics Controller registers.
The extension registers are listed in tables which follow. A full description of the
registers is included in the manufacturers data sheet and is not reproduced here.
The table below lists the CRT Controller register extensions accessed at 03B4h and
03B5h or 03D4h and 03D5h.
Register Index
Interlace end 19
Interlace control 1A
Extended display controls 1B
Part status 25
ID register 27
The table below lists the Sequencer register extensions accessed at 03C4h and 03C5h.
Register Index
Unlock all extensions 6
Extended sequencer mode 7
EEPROM control 8
Scratch pad 0 9
Scratch pad 1 A
VCLK numerators 0-3 B-E
DRAM control F
Graphics cursor Y position 10
Graphics cursor X position 11
Graphics cursor attributes 12
Graphics cursor pattern address offset 13
Scratch pad 2 * 14
Scratch pad 3 * 15
Performance tuning * 16
Signature generator control 18
Signature generator result (low byte) 19
Signature generator result (high byte) 1A
VCLK0-3 denominator and post-scalar value 1B-1E
BIOS ROM write enable and MCLK select 1F
* indicates that the register is present in the CL-GD5426, but not the CL-GD5422.