junglejourney

changeset 16:acc98c3592fd

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Blank the screen while preparing each room and set an appropriate palette after it has been drawn.
author David Boddie <david@boddie.org.uk>
date Sat Aug 13 03:05:46 2011 +0200
parents 551e7b2ddacd
children ae5f572644bd
files mapcode.oph
diffstat 1 files changed, 38 insertions(+), 0 deletions(-) [+]
line diff
     1.1 --- a/mapcode.oph	Sat Aug 13 02:41:00 2011 +0200
     1.2 +++ b/mapcode.oph	Sat Aug 13 03:05:46 2011 +0200
     1.3 @@ -392,6 +392,8 @@
     1.4      rts
     1.5  
     1.6  plot_room:          ; $78,$79 = i,j (from $4ff0,$4ff1)
     1.7 +    jsr blank_screen
     1.8 +
     1.9      lda $4ff0
    1.10      sta $78
    1.11      lda $4ff1
    1.12 @@ -445,6 +447,24 @@
    1.13          jmp row_loop
    1.14      
    1.15  end_rows:
    1.16 +    lda #1
    1.17 +    sta $70
    1.18 +    lda $78
    1.19 +    eor $79
    1.20 +    and #3
    1.21 +    asl
    1.22 +    adc #1
    1.23 +    sta $71
    1.24 +    jsr set_palette
    1.25 +
    1.26 +    lda #2
    1.27 +    sta $70
    1.28 +    sta $71
    1.29 +    jsr set_palette
    1.30 +    lda #3
    1.31 +    sta $70
    1.32 +    sta $71
    1.33 +    jsr set_palette
    1.34      rts
    1.35  
    1.36  
    1.37 @@ -640,6 +660,24 @@
    1.38      jsr $fff1
    1.39      rts
    1.40  
    1.41 +blank_screen:
    1.42 +    lda #1
    1.43 +    sta $70
    1.44 +    lda #0
    1.45 +    sta $71
    1.46 +    jsr set_palette
    1.47 +    lda #2
    1.48 +    sta $70
    1.49 +    lda #0
    1.50 +    sta $71
    1.51 +    jsr set_palette
    1.52 +    lda #3
    1.53 +    sta $70
    1.54 +    lda #0
    1.55 +    sta $71
    1.56 +    jsr set_palette
    1.57 +    rts
    1.58 +
    1.59  sprites_file_name: .byte "SPRITES", 13
    1.60  chars_file_name: .byte "CHARS", 13
    1.61