In this situation, TinyTERM connects to a host via serial cable successfully. Another application on the PC then makes a modem connection. This causes the system to lock up completely.

Check the IRQs used by the serial port and modem. If both are trying to use one IRQ — or worse, one COM port — that will cause the lockup. Assign the modem its own IRQ.

This entry was posted on Monday, April 16th, 2007 at 2:45 pm and is filed under Modem, Serial (RS232). You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.