Apricot AT modems - Comm Port details
Apricot currently ship two types of AT modem, the Triplex modem and the
Quad modem.
Both modems are configurable as COM1, 2, 3 or 4; however, they treat
COM3 and COM4 differently on each.
For those people using third party communications software that can
change the communications port set-up, here are the details.
| TRIPLEX |
QUAD (UNITY GOLD+) |
| Port |
IRQ |
Base Addr |
IRQ |
Base Addr |
| COM1 |
4 |
3F8-3FFh |
4 |
3F8-3FFh |
| COM2 |
3 |
2F8-2FFh |
3 |
3F8-2FFh |
| COM3 |
5 |
3E8-3EFh |
4 |
3E8-3EFh |
| COM4 |
10 |
2E8-2EFh |
3 |
2E8-2EFh |
DTC will only currently address the Triplex modem when configured as
COM3 or COM4 (if using W8250.EXE Vr 1.1.0). Support for the Quad modem on COM3 and COM4 in
DTC is currently being examined.
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