HP86 problem

[rprosperi]

(07-04-2019 03:39 PM)smp Wrote:  When the system powers up, you are in BASIC, so, indeed, you are entering a bad statement. Try: Print 3+3<CR>

You have to enter proper BASIC statements in immediate mode, or enter a line number for each statement if you want to build up a multi-line program.

Actually, HP BASIC (and likely many others, but I don't have access to them to check) allows commands such as "3 + 3 [END LINE]" as valid, as there is an implied DISP command inserted by the OS. So typing that should return 6. Such lines are not illegal and should not produce any errors, so it's definitely something else in your system.

I know this is true for Series-70 and Series-80 machines, but don't know for sure about the 90x0 and 90x5 machines, though I'd guess they're all the same in this way.