mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-29 00:31:52 +00:00
171 lines
2.2 KiB
ArmAsm
171 lines
2.2 KiB
ArmAsm
; Ootw Rope course
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ootw_rope:
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;===========================
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; Enable graphics
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bit LORES
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bit SET_GR
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bit FULLGR
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;===========================
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; Setup pages (is this necessary?)
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lda #0
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sta DRAW_PAGE
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lda #1
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sta DISP_PAGE
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;===========================
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; Setup right/left exit paramaters
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lda #37
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sta RIGHT_LIMIT
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lda #11
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sta LEFT_LIMIT
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;=============================
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; Load background to $c00
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lda #>(rope_rle)
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sta GBASH
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lda #<(rope_rle)
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sta GBASL
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lda #$c ; load image off-screen $c00
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jsr load_rle_gr
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;================================
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; Load quake background to $1000
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jsr gr_make_quake
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;=================================
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; copy $c00 to both pages $400/$800
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jsr gr_copy_to_current
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jsr page_flip
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jsr gr_copy_to_current
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;=================================
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; setup vars
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lda #0
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sta GAIT
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sta GAME_OVER
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;============================
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; Rope Loop
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;============================
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rope_loop:
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;================================
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; handle earthquakes
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jsr earthquake_handler
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;===============================
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; check keyboard
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jsr handle_keypress
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;===============
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; draw physicist
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; adjust y for slope
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lda PHYSICIST_X
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cmp #26
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bcs phys_no_adjust_y ; blt
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cmp #17
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bcc phys_on_platform
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; lda PHYSICIST_X
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sec
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sbc #3
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and #$fe ; our sprite code only draws even y
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jmp phys_done_adjust_y
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; slope is 15 - 26 ( 28 - 36)
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; 26 -> 22
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phys_on_platform:
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lda #14
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bne phys_done_adjust_y
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phys_no_adjust_y:
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lda #22
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phys_done_adjust_y:
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sta PHYSICIST_Y
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jsr draw_physicist
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;======================
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; draw foreground plant
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lda #<foreground_spikes
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sta INL
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lda #>foreground_spikes
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sta INH
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lda #30
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sta XPOS
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lda #30
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sec
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sbc EARTH_OFFSET
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sta YPOS
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jsr put_sprite
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;================
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; draw falling boulder
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jsr draw_boulder
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;===============
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; page flip
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jsr page_flip
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;================
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; inc frame count
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inc FRAMEL
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bne rope_frame_no_oflo
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inc FRAMEH
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rope_frame_no_oflo:
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; pause?
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; check if done this level
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lda GAME_OVER
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cmp #$ff
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beq done_rope
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; check if done this level
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cmp #$2
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bne not_done_rope
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lda #0
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sta PHYSICIST_X
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sta EARTH_OFFSET
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jmp ootw_pool
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not_done_rope:
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; loop forever
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jmp rope_loop
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done_rope:
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rts
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