When these machines arrived at the local Radio Shack store my brother and I went to have a look. The only interesting thing you could do with the machine was program it. They may have had a couple of applications on tape in the store but we ignored them. The programming manual was very friendly, with a cartoon character that looked like a TRS-80 spouting explanations.
As I understand it the Level I BASIC that came with the machine was a custom version of Tiny BASIC. It had single letter variable names, only one string variable (I think), and it had only three error messages for the programmer:
- What? - Syntax error
- How? - Divide by zero, etc.
- Sorry. - Out of memory
Level I BASIC also had SET and RESET commands so you could draw graphics on a 128x48 grid.