screen editor -- fix STOP-DEL - Githubissues

chitselb / pettil

6502 Forth-83 dialect for the Commodore PET 2001

http://pettil.tumblr.com

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screen editor -- fix STOP-DEL #75

Open chitselb opened 5 years ago

chitselb commented 5 years ago

test procedure:

enter the editor, create several unique screens and page through them. Clear and update a few screens

clear screen 0
don't clear screen 0
clear adjacent screens
clear several nonadjacent screens individually and in groups
clear alternating screens STOP-DEL STOP-HOME, STOP-? and STOP-UP to review the screens
verify correct number of screens
verify they're the original screens
verify it works with data blocks
verify it does not delete a data block consisting of 1024 spaces
verify correct ordering
verify no blank screens (other than screen 0)

chitselb commented 5 years ago

any screens that are blank are removed from VMBUF It may not remove screen 0 (the index screen)