Mitsubishi Electric Apricot LS Pro, Hardware Technical Reference

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Memory and I/O Usage
Chapter 4
Chapter 6
Appendix A
Appendix C
Pr
eface
Chapter 4Chapter 5
5/24 LS PRO HARDWARE TECHNICAL REFERENCE
The index register is an index to the attribute data registers. Unlike the other index
registers of the VGA adapter, the attribute index and data registers are located at the
same I/O address. Alternate writes are to the index and then the data register.
Register Address
Attribute controller index register 03C0h (RWMC)
Attribute controller data register 03C0h (WMC)
03C1h (RMC)
R - read
W - write
M - monochrome
C - colour
The following table shows the index values and the registers that are accessed by them:
Register Index
Palette 00h to 0Fh
Attribute mode control 10h
Overscan control 11h
Colour plane enable 12h
Horizontal pixel panning 13h
Colour select 14h
These are standard VGA registers and are not described in further detail here.