Graphics Controller Registers; Attribute Controller Registers; Registers - Mitsubishi Electric LS Pro Hardware Technical Reference

Graphics The graphics controller registers handle the reading, writing and other manipulations
controller of the graphics data.

registers

The registers are accessed by using index and data registers. To access a register, first
write to the index register with the index of the register to be accessed, then write to
the data register with the data to be loaded.
Register
Graphics controller index register
Graphics controller data register
R - read
W - write
M - monochrome
C - colour
The following table shows the index and the registers which can be accessed via the
index.
Register
Set/reset
Enable set/reset
Colour compare
Data rotate
Read map select
Graphics mode
Miscellaneous
Colour don't care
Bit mask
These are standard VGA registers and are not described in further detail here.
Attribute These registers control the screen attributes. In text mode, these are the colour,
controller intensity and blinking of the characters, and the background. In graphics mode, you can
registers select the colour to each pixel.
The four memory planes generate a four bit colour code for each pixel. The colour
plane enable register allows each memory plane to be enabled or disabled.
Each colour code is translated by a palette register into video signals to drive the
monitor.
The attribute controller registers are addressed by a single I/O port address.
Memory and I/O Usage
03CEh (RWMC)
03CFh (RWMC)
LS PRO HARDWARE TECHNICAL REFERENCE 5/23
Address
Index
00h
01h
02h
03h
04h
05h
06h
07h
08h