The BBC and Master Computer Public Domain Library

B393 EDIT

Submitted by Steve Fewell

Description:

Call &BBAC to Initialise Page &7 and to clear variables, etc...
Set LISTO flag to #&80 (so that the top bit is set (indicating that we are in EDIT mode).
Before the EDITOR application can be caled, the program needs to be detokenised into ASCII-text and stored to memory
This is done by calling the LIST routine with the LISTO flag set to #&80 (meaning that all output will be stored to
memory instead of being displayed on the screen). All but the top bit of the LISTO flag is set to 0 to specify that no
special LISTO spacing formats are to be applied to the program listing.
So, lastly, call the LIST routine to handle the listing of the program and storing to memory.

Note: as LIST is used to detokenize, a side-effect allows usage of the EDIT IF xxx and EDIT options (as detailed in the manual); however, these options appear to have limited use, as anything not included in the LIST output will be lost.

Disassembly for the EDIT routine