18 SB-6862
The I/O Address Map
Address (hex) Function
000-01F DMA #1
020-03F INTR #1
040-05F Timer
060-06F Keyboard
070-07F NMI mask register
080-09F DMA page register
0A0-OBF INTR #2
0C0-ODF DMA #2
0F0-0F1 Clr/rst math coprocessor
0F8-0FF Math coprocessor
1F0-1F8 Fixed disk
200-207 Joystick
278-27F Secondary parallel port
2F8-2FF Secondary serial port
300-31F Prototype card
378-37F Primary parallel port
380-38F SDLC (secondary bisynchronous)
3A0-3AF Primary bisynchronous
3B0-3BF Monochrome display/printer adapter
3D0-3DF Color/graphics monitor adapter
3F0-3F7 Diskette controller
3F8-3FF Primary serial port