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G586SP/G586SP AIO
55
I/O Address Map
I/O Address Function
000-01F DMA Controller 1, 8237A-5
020-03F Interrupt Controller 1, 8259A, Master
040-05F Timer, 8254-2
060-06F 8742 (Keyboard Controller)
070-07F Real-time Clock, NMI
(Non-maskable Interrupt) Mask
080-09F DMA Page Memory, 74LS612
0A0-08F Interrupt Controller 2, 8259A
0C0-0DF DMA Controller 2, 8237A-5
0E8 Shadow RAM and Cache Control Bit
0F0 Clear Numeric Processor
Extension Busy
0F1 Reset Numeric Processor Extension
0F8-OFF Numeric Processor Extension
1F0-1F8 Primary Fixed Disk
170-178 Secondary Fixed Disk
200-207 Game I/O
278-27F Parallel Printer Port 2
2F8-2FF Serial Port 2
300-31F Prototype Card
360-36F Reserved
378-37F Parallel Printer Port 1
380-38F SDLC, Bisynchronous 2
3A0-3AF Bisynchronous 1
3B0-3BF Monochrome Display and Printer
Adapter
3C0-3CF Reserved
3D0-3DF Color/Graphics Monitor Adapter
3F0-3F7 Diskette Controller
3F8-3FF Serial Port 1
Note:
The I/O address hex 000 to 0FF are reserved for the system
board I/0. Hex 100 to 3FF are available on the I/O chan-
nels.