;-------------------------------
; #JMPBBFE
; marketed as 'Lock-It-Up'
; boot0 jumps to ($BBFE) instead of ($08FD)
; for a weakbits check at $BB00
;
; tested on
; - All About Purim
; - American Government
; - Aphasia I-IV
; - Association Pictures
; - Bible Baseball
; - Bolo
; - Building Compounds
; - Building With Vowels
; - Catch a Falling Star - Dolphin Math Games
; - Challenge Sentence Combining
; - Cloze Thinking
; - Comparing Numbers
; - Congo
; - Correct Behavior - The Mexican Way
; - Counting Patterns I
; - Counting Patterns II
; - Crisis Mountain
; - Cubit
; - Double Trouble
; - Escape from Arcturus
; - Essential Idioms
; - Flockland Island Crisis
; - Function Pictures
; - Geography Adventure USA
; - Guderian
; - Hebrew Phrasebook
; - Ice Demons
; - Identifying Affixes
; - Identifying Compound Words
; - Identifying Matching Letters
; - Identifying Vowel Sounds
; - In Search of The Most Amazing Thing
; - Kindercomp (first release)
; - Knowledge Master (all disks)
; - La Triviata
; - MasterType and Training Ground 2.1
; - MasterType's Figures and Formulas
; - Mastering Consonants
; - Mastering Vowels
; - Matching Letters and Words
; - Math Item Banks 1-13
; - Max Dublin's Treasure
; - Microbe (all known releases)
; - Mind Over Matter
; - Mind Prober demo
; - Nightmare Gallery
; - Number Concepts
; - Number Patterns
; - Oil Rig
; - Ordering Letters and Words
; - PSAT Word Attack Skills (all disks)
; - Place Value Recognition I
; - Pollywog
; - Pop 'R Spell
; - Prisoner 2 v1.0.1
; - Quadrilaterals
; - Read and Spell (all disks)
; - Rhyming Pictures
; - Rocky's Boots v1.0
; - Search (Davka)
; - Space Games - Appointment at Aldebaran and Procyon Warrior
; - Spanish Classroom Words
; - Spelling Bee Games
; - Spelling and Sound Relationships
; - Stoichiometry
; - Super Sunday 1.0
; - Syllabication
; - Syllable Stress
; - Syllable Stress, Affixes, and Compounds
; - Tactical Armour Command
; - The Caves of Olympus
; - The Human Fly
; - The Newsroom self-running demo
; - The Philistine Ploy
; - The Planetary Guide
; - The Reading Machine (some releases)
; - The Visible Computer
; - The Vocabulary Machine v1.1
; - Tsushima
; - Verbal Item Banks 1-13
; - Viewmax-80 Pre-Boot
; - Vocabulary Flashcards v3.1E
; - Whole Number Practice
; - Word Unscramble
; - World War II
;-------------------------------
!zone {
_jmpbbfe
         lda   gIsBoot0   ; if DOS 3.3 boot0 loader
         bne   .exit
         ldx   #$4B
         ldy   #$02
         jsr   compare    ; and T00,S00,$4B ==
         !byte $FE,$BB
         bcs   .exit

; variation 1 (common)

         lda   #$05
         ldx   #$20
         tay
         jsr   compare
         !byte $A9,WILDCARD
         !byte $8D,$00,$02
         bcc   .yes      ; passport-test-suite/Quadrilaterals.woz [C=0] matches

; variation 2 (earlier, less common)

         ldx   #$19
         tay
         jsr   compare
         !byte $A9,WILDCARD
         !byte $8D,$00,$02
         bcs   .exit

.yes     stx   +          ; byte offset (varies)
         inx
         inx
         inx
         inx
         inx
         ldy   #$03
         jsr   modify
         !byte $6C,$FD,$08

         ldx   #$FE
         ldy   #$01
         jsr   modify
+        !byte $FD        ; SMC (byte offset of new entry point)

.exit
}