Made player interface more explicit.

2018-08-12 12:21:10 +02:00 · 2018-08-12 12:21:10 +02:00 · 7abb5d60cb
parent ae8077df9c
commit 7abb5d60cb
1 changed files with 10 additions and 7 deletions
--- a/play-btc.s
+++ b/play-btc.s
@ -9,13 +9,8 @@

        jsr $FC58

-        lda #<__DATA_LOAD__
-        ldx #>__DATA_LOAD__
-        sta $FE
-        stx $FE+1
-
+        lda #>__DATA_LOAD__
        ldx #>__DATA_SIZE__
-        ldy #$00
        jsr PLAY

        lda $C010
@ -33,8 +28,16 @@ QUIT:   .byte $04       ; param_count
        .byte $00       ; reserved
        .word $0000     ; reserved

+; player core
+; parameters:
+;   A - first page to play
+;   X - pages to play
+; uses:
+;   $FE,$FF
+PLAY:   ldy #$00
+        sty $FE
+        sta $FE+1

-PLAY:
 ; loop here as long as bits are [F]alse (aka 0)
 F_NX:   nop             ; 2                         2
        nop             ; 2                         2