move DrawPage to ui.font with other drawing routines

src/ui.credits.a

@@ -18,70 +18,14 @@ Credits
          lda   OffscreenPage
          ror                         ; draw on offscreen page
          +LDADDR $8000
-         jsr   .DrawPage
-         jsr   ShowOtherPage
-         jsr   WaitForKeyFor30Seconds
-         jsr   ShowOtherPage
-         bit   CLEARKBD
-         clc
+         jsr   DrawPage              ; draw credits
+         jsr   ShowOtherPage         ; show credits
+         jsr   WaitForKeyFor30Seconds; wait
+         bit   CLEARKBD              ; don't care about key
+         jsr   ShowOtherPage         ; back to previous page
+         clc                         ; if called from search mode, tell caller not to refresh
          rts
 .CreditsFile
          !byte 7
          !text "CREDITS"
-
-.DrawPage
-; A/Y contains address of character buffer
-; carry bit clear -> draw on page 1
-; carry bit set   -> draw on page 2
-; drawing starts at VTAB 0, HTAB 0
-; clobbers PTR
-; clobbers A/X/Y
-; preserves all flags, by a quirk of implementation
-         php
-         ldx   #0
-         stx   VTAB
-         +STAY PTR
-@drawLine
-         ldy   #0
-         sty   HTAB
-@parseLine
-         lda   (PTR),y
-         cmp   #$5B                  ; '[' at beginning on line
-         bne   +                     ; ends the parsing
-         tya
-         beq   @donePage
-+        cmp   #$0D
-         beq   @doneParsingLine
-         cmp   #$2A
-         bne   +
-         lda   #$10
-         sta   (PTR),y               ; asterisk -> dot, small
-+        cmp   #$7E
-         bne   +
-         lda   #$11
-         sta   (PTR),y               ; tilde -> dot, medium
-+        iny
-         bne   @parseLine
-@doneParsingLine
-         sty   SAVE
-         cpy   #0
-         beq   @skip
-         ldx   SAVE
-         +LDAY PTR
-         plp
-         php
-         jsr   DrawBuffer
-@skip    inc   SAVE                  ; skip carriage return
-         lda   SAVE                  ; advance PTR to start of next line
-         clc
-         adc   PTR
-         sta   PTR
-         bcc   +
-         inc   PTR+1
-+        inc   VTAB                  ; this will print 255 lines if you give it
-         bne   @drawLine             ; 255 lines, so don't do that
-@donePage
-         plp
-         rts
-
 }

src/ui.font.a

@@ -4,11 +4,67 @@
 ; hi-res font drawing routines
 ;
 ; Public functions
+; - DrawPage
 ; - Draw40Chars
 ; - DrawString
 ; - DrawBuffer
 ;
 
+DrawPage
+; A/Y contains address of character buffer
+; carry bit clear -> draw on page 1
+; carry bit set   -> draw on page 2
+; drawing starts at VTAB 0, HTAB 0
+; clobbers PTR
+; clobbers A/X/Y
+; preserves all flags, by a quirk of implementation
+         php
+         ldx   #0
+         stx   VTAB
+         +STAY PTR
+@drawLine
+         ldy   #0
+         sty   HTAB
+@parseLine
+         lda   (PTR),y
+         cmp   #$5B                  ; '[' at beginning on line
+         bne   +                     ; ends the parsing
+         tya
+         beq   @donePage
++        cmp   #$0D
+         beq   @doneParsingLine
+         cmp   #$2A
+         bne   +
+         lda   #$10
+         sta   (PTR),y               ; asterisk -> dot, small
++        cmp   #$7E
+         bne   +
+         lda   #$11
+         sta   (PTR),y               ; tilde -> dot, medium
++        iny
+         bne   @parseLine
+@doneParsingLine
+         sty   SAVE
+         cpy   #0
+         beq   @skip
+         ldx   SAVE
+         +LDAY PTR
+         plp
+         php
+         jsr   DrawBuffer
+@skip    inc   SAVE                  ; skip carriage return
+         lda   SAVE                  ; advance PTR to start of next line
+         clc
+         adc   PTR
+         sta   PTR
+         bcc   +
+         inc   PTR+1
++        inc   VTAB                  ; this will print 255 lines if you give it
+         bne   @drawLine             ; 255 lines, so don't do that
+@donePage
+         plp
+         rts
+
 Draw40Chars
 ; A/Y contains address of character buffer
 ; carry bit clear -> draw on page 1