DTA: I/O

I/O
Speaker
I/O Map
Keyboard Connector
Parallel Port Connector
Mouse Connector
Serial Port Connector

I/O Port Connectors

Speaker
The speaker is installed through a mounting hole in the front panel of the computer and into a preformed bracket in the card guide assembly.

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 and printer adapter

3C0  3CF              EGA

3D0  3DF              CGA

3F8  3FF              Serial port 1