Mitsubishi Electric Apricot LS Pro, Техническое описание оборудования

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Memory and I/O Usage
Chapter 4
Chapter 6
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
5/20 LS PRO HARDWARE TECHNICAL REFERENCE
VGA registers
The registers which configure and control the VGA are divided into six groups. Each
group of registers is accessed by a number of I/O port addresses. The register groups
and port addresses are shown in the list below.
Registers Attributes Address
General Registers
Miscellaneous output register WMC 03C2h
RMC 03CCh
Input status register 0 RMC 03C2h
Input status register 1 RM 03BAh
RC 03DAh
Feature control register WM 03BAh
WC 03DAh
RMC 03CAh
Video subsystem enable register RW 46E8h
Sequencer registers
Sequencer index registers RWMC 03C4h
Sequencer data registers RWMC 03C5h
CRT controller registers
Index register RWM 03B4h
RWC 03D4h
CRT controller data register RWM 03B5h
RWC 03D5h
Graphics controller registers
Index register RWMC 03CEh
Other graphic registers RWMC 03CFh
Attribute controller registers
Index register RWMC 03C0h
Attribute controller data registers WMC 03C0h
RMC 03C1h
DAC registers
The DAC registers are described on page 5/18.
R - read
W - write
M - monochrome
C - colour
All the above registers are functionally identical to the IBM standard VGA equivalents.
The groups of registers are described in the following sections. There are several pairs
of registers an index register and a data register. In these cases the index register is
a pointer to a number of other registers which are accessed via the accompanying data
register.