229 lines
2.8 KiB
ArmAsm
229 lines
2.8 KiB
ArmAsm
; gr duck pond
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;
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; by deater (Vince Weaver) <vince@deater.net>
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; todo
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; videlectrix/ f to feed message
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; F feeds
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; A anvil (what happens when land on duck)
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; Y drain pond
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; ESC exit
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; S spawn new duck
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; N night (twilight?)
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; J jump in pond
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; D/G throw short vs long?
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; replace "bread" with "food"
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;123456789012345678901234567890123456789
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; *** VIDELECTRIX ***
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;
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; PRESS "F" TO THROW BREAD
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; PRESS SPACEBAR TO START
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.include "zp.inc"
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.include "hardware.inc"
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duck_pond:
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;===================
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; set graphics mode
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;===================
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jsr HOME
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bit LORES
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bit FULLGR
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bit SET_GR
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bit PAGE1
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lda #$4
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sta DRAW_PAGE
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lda #$0
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sta FRAME
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sta FRAMEH
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sta DISP_PAGE
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;===================
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; TITLE SCREEN
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;===================
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title_screen:
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lda #<title_data
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sta ZX0_src
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lda #>title_data
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sta ZX0_src+1
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lda #$c ; load at $C00
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jsr full_decomp
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jsr gr_copy_to_current
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bit TEXTGR
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jsr page_flip
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wait_until_keypress:
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lda KEYPRESS ; 4
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bpl wait_until_keypress ; 3
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bit KEYRESET ; clear the keyboard buffer
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;===================
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; INIT GAME
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;===================
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init_game:
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lda #0
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sta D1_SCORE
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sta D1_SCORE_H
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sta D2_SCORE
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sta D2_SCORE_H
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lda #1
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sta D1_STATE
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sta D2_STATE
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lda #10
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sta D1_XPOS
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sta D1_YPOS
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lda #14
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sta D2_XPOS
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sta D2_YPOS
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lda #$FF
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sta D1_XSPEED
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sta D1_YSPEED
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sta D2_XSPEED
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sta D2_YSPEED
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; load background
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lda #<main_data
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sta ZX0_src
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lda #>main_data
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sta ZX0_src+1
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lda #$c
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jsr full_decomp
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jsr gr_copy_to_current
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bit FULLGR
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;===================
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; MAIN LOOP
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;===================
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main_loop:
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jsr gr_copy_to_current
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; copy over background
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; draw arm animation
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; draw food
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; draw ducks
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jsr draw_duck1
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jsr draw_duck2
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; draw anvil/splash
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; draw score
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jsr draw_score
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; flip page
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jsr page_flip
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; move food
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; move arm
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; move anvil
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; move ducks
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jsr move_ducks
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; drain water
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; check keyboard
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wait_until_keypress2:
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lda KEYPRESS ; 4
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bpl done_loop
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bit KEYRESET ; clear the keyboard buffer
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and #$7f ; clear high bit
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cmp #' ' ; don't lose space
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beq was_space
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and #$df ; convert lowercase to uppercase
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was_space:
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check_bracket:
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cmp #'S'
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bne check_escape
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jsr score_inc_d1
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lda #$ff
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sta D1_XSPEED
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jmp done_keyboard
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check_escape:
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cmp #27
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bne done_keyboard
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lda #0
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sta WHICH_LOAD
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rts
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done_keyboard:
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; increment frame
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inc FRAME
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bne frame_noflo
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inc FRAMEH
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frame_noflo:
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done_loop:
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jmp main_loop
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.include "zx02_optim.s"
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.include "gr_copy.s"
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.include "gr_offsets.s"
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.include "gr_putsprite_mask.s"
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.include "gr_pageflip.s"
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.include "duck_score.s"
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.include "draw_ducks.s"
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.include "move_ducks.s"
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title_data:
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.incbin "duck_graphics/a2_duckpond_title.gr.zx02"
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main_data:
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.incbin "duck_graphics/a2_duckpond.gr.zx02"
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.include "duck_graphics/num_sprites.inc"
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.include "duck_graphics/duck_sprites.inc"
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