276 lines
3.5 KiB
ArmAsm
276 lines
3.5 KiB
ArmAsm
; Strongbad Zone
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;
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; Yet Another HR project
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;
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; by deater (Vince Weaver) <vince@deater.net>
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.include "zp.inc"
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.include "hardware.inc"
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div7_table = $400
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mod7_table = $500
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hposn_high = $600
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hposn_low = $700
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strongbadzone_start:
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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 HIRES
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bit FULLGR
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bit SET_GR
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bit PAGE1
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;====================
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; set up tables
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;====================
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lda #$20
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sta HGR_PAGE
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jsr hgr_make_tables
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;==========================
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; Load Title
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;===========================
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load_title:
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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 #$20
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jsr full_decomp
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; load to page2 for color cycle
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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 #$40
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jsr full_decomp
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title_cycle_loop:
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jsr cycle_colors
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inc FRAME
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lda KEYPRESS
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bpl title_cycle_loop
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bit KEYRESET
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;===================
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; setup game
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;===================
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;==========================
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; Load Background
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;===========================
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load_background:
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; size in ldsizeh:ldsizel (f1/f0)
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lda #<comp_data
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sta ZX0_src
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lda #>comp_data
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sta ZX0_src+1
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lda #$80
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jsr full_decomp
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lda #16
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sta STRONGBAD_X
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sta PLAYER_X
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lda #1
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sta STRONGBAD_DIR
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;==========================
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; main loop
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;===========================
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main_loop:
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;==========
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; flip page
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;==========
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lda DRAW_PAGE
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beq draw_page2
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draw_page1:
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bit PAGE2
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lda #0
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beq done_flip
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draw_page2:
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bit PAGE1
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lda #$20
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done_flip:
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sta DRAW_PAGE
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;========================
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; copy over backgrund
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;========================
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jsr hgr_copy
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inc FRAME
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;===========================
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; move head
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;===========================
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lda FRAME
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and #$3
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bne no_move_head
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lda STRONGBAD_X
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cmp #21
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bcs reverse_head_dir
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cmp #12
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bcs no_reverse_head_dir
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reverse_head_dir:
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lda STRONGBAD_DIR
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eor #$FF
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sta STRONGBAD_DIR
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inc STRONGBAD_DIR
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no_reverse_head_dir:
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clc
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lda STRONGBAD_X
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adc STRONGBAD_DIR
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sta STRONGBAD_X
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no_move_head:
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;==========================
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; draw head
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;===========================
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lda #<head_sprite
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sta INL
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lda #>head_sprite
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sta INH
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lda STRONGBAD_X
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sta SPRITE_X
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lda #36
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sta SPRITE_Y
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jsr hgr_draw_sprite_big
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;==========================
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; draw player
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;===========================
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lda #<player_sprite
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sta INL
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lda #>player_sprite
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sta INH
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lda PLAYER_X
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sta SPRITE_X
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lda #138
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sta SPRITE_Y
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jsr hgr_draw_sprite_big
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check_keypress:
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lda KEYPRESS
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bpl done_keyboard_check
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bit KEYRESET ; clear the keyboard strobe
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; clear high bit
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and #$7f
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; FIXME: adjust for lowercase too
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cmp #'Q'
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beq done_game
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cmp #27 ; escape
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beq done_game
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cmp #'A' ; shield left
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cmp #'S' ; shield center
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cmp #'D' ; shield right
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cmp #8 ; left
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beq move_left
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cmp #$15
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beq move_right ; right
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done_keyboard_check:
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jmp main_loop
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move_left:
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lda PLAYER_X
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beq no_more_left
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dec PLAYER_X
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no_more_left:
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jmp main_loop
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move_right:
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lda PLAYER_X
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cmp #29 ; bge
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bcs no_more_right
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inc PLAYER_X
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no_more_right:
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jmp main_loop
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;==========================
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; done game
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;==========================
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done_game:
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lda #0
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sta WHICH_LOAD
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rts
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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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rts
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.include "hgr_tables.s"
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.include "zx02_optim.s"
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.include "hgr_sprite_big.s"
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.include "cycle_colors.s"
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.include "hgr_copy_fast.s"
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.include "asplode_graphics/sb_sprites.inc"
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title_data:
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.incbin "asplode_graphics/sb_title.hgr.zx02"
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comp_data:
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.incbin "asplode_graphics/sb_zone.hgr.zx02"
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