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DTA: I/O
I/O
Port Locations
Keyboard Connector
Parallel Port Connector
Mouse Connector
Serial Port Connector
VGA Connector
Speaker
The speaker is mounted on the front panel behind the card guide bracket.
A twisted pair of wires connects the speaker to the speaker connector (SPKR) on the system board.
I/O Map
Hex Range Usage
000 01F DMA controller 1 (8237A-05)
020 03F Interrupt controller 1 (8259A)
040 05F Timer 8254.2
060 06F Keyboard controller (8042)
070 07F RTC, NMI mask
080 09F DMA page registers
0A0 0BF Interrupt controller 2 (8259A)
0C0 0DF DMA controller 2 (8237A-5)
0E0 0EF Reserved
0F0 Clear math coprocessor busy
0F1 Reset math coprocessor
0F8 0FF Math coprocessor
1F0 1F7 Hard disk controller (HDC)
200 207 Game I/O
238 23F Serial port 4 (used for remapping)
278 27F Parallel port 2
2B0 2DF Alternate EGA
2E1 GPIB (adapter 0)
2F8 2FF Serial port 2
338 33F Serial port 3 (used for remapping)
378 37F Parallel port 1
3B0 3BF Mono display & printer adapter
3C0 3CF EGA
3D0 3DF CGA
3F8 3FF Serial port 1
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