mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-20 01:29:36 +00:00
55 lines
755 B
ArmAsm
55 lines
755 B
ArmAsm
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; someone pressed UP
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up_action:
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; check if it's a key slot
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check_red_keyhole:
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; check that we have the key
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lda INVENTORY
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and #INV_RED_KEY
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beq done_up_action
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; open the red wall
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; there has to be a more efficient way of doing this
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; reset smc
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lda #>BIG_TILEMAP
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sta rwr_smc1+2
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sta rwr_smc2+2
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remove_red_wall_outer:
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ldx #0
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remove_red_wall_loop:
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rwr_smc1:
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lda BIG_TILEMAP,X
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cmp #49 ; red key tile
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bne not_red_tile
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lda #2 ; lblue bg tile
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rwr_smc2:
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sta BIG_TILEMAP,X
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not_red_tile:
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inx
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bne remove_red_wall_loop
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inc rwr_smc1+2
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inc rwr_smc2+2
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lda rwr_smc1+2
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cmp #(>BIG_TILEMAP)+40
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bne remove_red_wall_outer
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; refresh local tilemap
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jsr copy_tilemap_subset
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; check if it's the exit
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check_if_exit:
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done_up_action:
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rts
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