The BBC and Master Computer Public Domain Library

8075 Lookup Subroutine Name in FN/PROC Variable Lookup Table

Submitted by Steve Fewell

Description:

Store Y (a pointer to the end of the Subroutine Name) in &39.
Load the first character of the subroutine call (from (&37-&38) offset 1).
If the character is 'PROC-token' then jump to &808D with Y = #&F6.
If the character is 'FN-token' then jump to &808D with Y = #&F8.
The PROCedure lookup table is located at &04F6-&04F7 & the FuNction lookup table is located at &04F8-&04F9.

Routine &808D will return with the address (in &2A-&2B) of the variable (at &37-&38) where Y
points to the lookup table offset.

If A contains zero after the &808D routine has finished, then the subroutine name was not found.

Disassembly for the Lookup Subroutine Name in FN/PROC Variable Lookup Table routine