Limitations on Port Configurations

The ports have a different signals available, as shown in Table 2.2

Table 2.2 Available signals on ports 1, 2, 3 and 4

If you are using the modem set for Half Duplex connected to a port of the Interface Module, then the port when outputting must be configured for Block Output and when inputting must be configured For Concurrent Mode I/O at not more than 300 Baud

Other limitations on port configurations are imposed by using a port in the conrurrent I/O mode These limitations are described in the Following section under the heading of Warnings and Restrictions.

Configurations with 5-, 6-. and 7-bit words are subject to limitations in other I/O parameters; these are described in the section on BASIC I/O statements, GET. INPUT, PUT and PRINT.

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