Speaker | I/O Map

Keyboard Connector
Parallel Port Connector
Mouse Connector
Serial Port Connectors

Speaker
The speaker is a piezo-electric speaker mounted on the system board.

I/O Map

Address          Device

0000 - 000F      DMA controller #1

0020 - 0023      Interrupt controller #1

0024             SHASTA data register

0025 - 0027      Interrupt controller #1

0028             SHASTA index register

0029 - 003F      Interrupt controller #1

0040 - 0043      System timers

0044 - 005F      Reserved

0060 - 006F      Keyboard controller

0070 - 0071      Real-time clock and NMI enable

0080 - 008F      DMA page registers

00A0 - 00BF      Interrupt controller #2

00C0 - 00DF      DMA controller #2

00F0             Coprocessor busy clear

00F1             Coprocessor busy reset

00F2 - 00FF      Available

278 - 27F        LPT2

2E8 - 2EF        COM4

2F8 - 2FF        COM2

378 - 37F        LPT1

3E8 - 3EF        COM3

3F8 - 3FF        COM1

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