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| Jumper/Designation | Setting | Function |
|---|---|---|
| J1 Speaker Amplification | *Out In |
**Reserved |
| JX1 Microphone Selection | *1-2 2-3 |
Condenser Microphone Carbon Microphone |
| JMPCFG Factory Default | *1-2 2-3 |
Normal Operation Factory Defaults (Disables EEPROM) |
| JMPB0 Sound Base Address | *1-2 2-3 |
220H 240H Note This jumper ignored when JMPCFG is on 1-2. This setting may also be changed in CONFIG.EXE. |