🚀 go-pugleaf

I have a problem with my serial port(s) that I hope
someone can help with.

I took my Mac IIcx to be repaired because of a problem
with the floppy drive (system was not recognizing the
insertion of a disk).  The technician replaced the logic
board and said things tested OK.

I got the machine home, hooked up my modem and printer,
and discovered the modem would not work.  It would
recognize my commands but nothing was printed on the
screen.  I switched the modem to the printer port, re-
configured the terminal program to that port, and every-
thing worked.

I assumed that the modem serial port was bad and returned
the machine for a second time for repair.  The technician
said the serial ports all checked out but replaced the
logic board again.  Home again, the same problem - modem
fails on modem port (loopback test fails too), switch modem
to printer port, reconfigure to that port, and now it works.

Does anyone have any ideas?

BTW:  The printer FAILS on the modem port just like the modem.

Bill Burrows
burrows@milton.acs.washington.edu