System l/O Address Map
Hex address Assigned device
000 - 01 F DMA controller 1, 8237
020 - 03F Interrupt controller 1, 8259
022 - 024 AliM1217 configuration register
040 - 05F Time r, 8254
060 - 06F Keyboard controller, 8042
070 - 07F(CMOS) Real-time clock NMI (non-ma&able interrupt) mask
080 - 09F DMA register, 74LS612
page
0A0 - 0BF Interrupt controller 2, 8259
0C0-0DF DMA controIler 2, 8237
OF0 Clearmath coprocessor
OF1 Reset math coprocessor
OF8 - OFF Math coprocessor
1 FO - 1 F8 Hard disk
200 - 207 Game I/O
278 - 27F Parallel printer port 2
2B0 - 2DF Alternate enhanced graphicsadapter
2E1 GPIB (adapter 0)
2E2, 2E3 Data acquisition (adapter 0)
2F8 - 2FF Serial port 2
300 - 31 F Prototype card
360 - 363 PC network (low address)
368 - 368 PC network (high address)
378 - 37F Parallel printer port 1
380 - 38F SDLC, bisynchronous 1
A-14
Specifications