Speaker | I/O Map | Connectors and Pinouts
The speaker is a standard cone speaker mounted behind the front panel on the front bottom of the system unit. It is positioned above the fan.
| 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 |
Keyboard Connector
Parallel Port Connector
Mouse Connector
Serial Port Connector