The really useless ROM Basic
in old TRS-80 Model I computer
s. It only gave you 26 numric variable
, two string
up to 16 characters long each, and one array
variable (named A, of course) that could have as many elements as you had RAM
for. Unlike newer BASIC dialect
s, Level I Basic required line number
s on every line.
Only 3 error messages exist in LeveL I Basic: WHAT? for syntax errors, HOW? for any other programmer error, and SORRY for computer errors (like running out of memory).
Level I Basic was eventually replaced (via ROM upgrade) to Level II Basic, which had many more features, variables and more informative cryptic error messages, not to mention some cool games that I want to translate to C if i ever get any free time.