PC 1401 Resources

More info: Simon-Lehmayr.de (english version)

Errors

From the hard cover:
Code Meaning
1 Syntax error
2 Calculation error
3 Illegal function argument (Usually type error)
4 Too large a line number (Line number is too large / Too many lines in RAM)
5 NEXT without FOR or RETURN without GOSUB (Stack underflow)
6 Memory overflow (Usually a stack overflow)
7 PRINT USING error (I don't know what this one even means)
8 I/O device error (Usually a communication error)
9 Other errors