feat(buzbee): made BUZBEE command line case insensitive

src/buzbee.s

@@ -44,6 +44,7 @@ BUZBEE
   bsr INPLOOP        ; Fill input buffer.
   cmpy #0            ; No data?
   beq BUZBEE         ;  Try again...
+  lbsr MKINSENSITIVE ; Make the input buffer case insensitive
   lbsr TOKENIZE      ; Try to tokenize the input buffer
   lbsr RUNIF         ; Execute token buffer, handling any errors
   bra BUZBEE         ; Repeat
@@ -127,6 +128,21 @@ NEXT@
   ldy #0            ; Reset buffer fill pointer
   rts
 
+; Makes the input buffer case insensitive
+MKINSENSITIVE
+NEXTC@
+  lda BBVAR.input,x
+  cmpa #'z            ; Is the char outside the lowercase range?
+  bhi NOTLCASE@       ;  Yes? Skip offset part
+  cmpa #'a            ; Again on the other side of the range
+  blo NOTLCASE@
+  anda #$DF           ; -32
+NOTLCASE@
+  leax 1,x            ; Ready next char
+  cmpx BBVAR.cchinput ; Are we at the end?
+  bne NEXTC@          ;  No? Loop
+  rts
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;
 ;; Hex Conversion and Printing Routines