2.3.7 IRQ and Address Setting
The IRQ and I/O address range of COM3 and COM4 are listed below: COM3: 3E8H, IRQ10 (Independent IRQ), IRQ10 (Share IRQ) COM4: 2E8H, IRQ5 (Independent IRQ), IRQ10 (Share IRQ)
Vector address for share IRQ: 1D0H
You can set “Share IRQ＂ or “Independent IRQ＂ by the first switch of SW4.
Table 2.2: IRQ Setting via switch 1 at SW4
Switch 1 at SW4 setting | Function |
| Shared IRQ (Default) |
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| Independent IRQ |
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You can adjust the transmission rate by the second switch of SW2.
Table 2.3: Speed Setting via switch 2 at SW4
Switch 2 at SW4 setting | Function |
| Speed X 8* |
|
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| Speed X 1 (Default) |
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*To increase the normal baud rates by eight times, (e.g. if 115.2K bps is set, the baud rate will be increased to 921.6K bps), set switch 2 of SW2 to “on＂
12 |