05-21-2020, 01:13 PM
It sounds like the WiModem232 is working (booting with the right colors, resetting, etc.). The fact that terminal program just suddenly locked up makes me wonder if you had the SCC chip in your Mac go bad?
What you can do to try to test your computer is build a loop-back cable. Basically, it ties TxD to RxD so every character you type in the terminal gets echo'd back to the terminal. If this works, then the WiModem232 would be bad.
Make sure you are using a good 5v power supply for the WiModem232. I saw odd things happen myself when powering it from a portable USB power supply where it's battery was almost dead.
What you can do to try to test your computer is build a loop-back cable. Basically, it ties TxD to RxD so every character you type in the terminal gets echo'd back to the terminal. If this works, then the WiModem232 would be bad.
Make sure you are using a good 5v power supply for the WiModem232. I saw odd things happen myself when powering it from a portable USB power supply where it's battery was almost dead.