20h ER$MESS display an error message
Input B = error number
Output - none -

Displays the error message associated with the error code given in B. ER$MESS then waits for the user to press SPACE or ON/CLEAR.

If there is no error message for this error code, the default message "*** ERROR ***" (or "UNKNOWN ERR x" on an LZ) is displayed.

NOTE : In the case of B = 194, the machine displays the message "BATTERY TOO LOW" for 4 seconds, then switches off.

Errors - none -