The BBC and Master Computer Public Domain Library

ACD7 Complement Result (get result then complement it)

Submitted by Steve Fewell

Routine: resultcomp
Name: Compliment Result
Starting Address: &ACD7

Description:
Calls AD4C to get the result of the expression (AD4C is part of the evaluate
expression/get next value from the command line/program routine).

If the return type of the result is 0 then a string was found; so, as this routine
requires a numerical result, a Type Mismatch error is generated.
If the return type of the result is negative (i.e. &FF) then a floating-point number
was found; so exit the routine via the Float Compliment routine [&ACCA].
Otherwise an integer was found (result type is &40). So, exit the routine via the
Integer Complement routine [&ACDE].

Disassembly for the compliment result routine