Specifications

Appendix A - Chip Set & I/O Map
Page A-5
A A
SVGA controller:
Cirrus CL-GD7543 (“Viking”)
I/O Addr Functional group Usage
3B4/3D4 VGA Controller CRT controller index
3B5/3D5 CRT controller ports
3BA/3DA Input status register 1
3C0 Attribute controller write port
3C1 Attribute controller read port
3C2 Misc. Output (write)
Input status register 0
3C3 Sleep Mode
3C4 Sequencer index
3C5 Sequencer ports
3C6 Pixel mask
3C7 Pixel address read mode (write)
DAC state (read)
3C8 Pixel address write mode
3C9 Pixel data
3CA Feature control
3CC Misc. Output (read)
3CE Graphics controller index
3CF Graphics controller ports