Table 1. Typical Port Addresses

Ports	Device
000-01f	dma
020-03f	pic1
040-05f	timer
060-06f	keyboard
080-09f	dma	page	reg
0a0-0bf	pic2
0c0-0df	dma2
0f0-0ff	npu
1b0-1be	mrv4
2f8-2ff	serial (auto)
3c0-3df	vga+
3f8-3ff	serial (auto)