mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-06-09 07:29:32 +00:00
136 lines
1.7 KiB
ArmAsm
136 lines
1.7 KiB
ArmAsm
; Ootw
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.include "zp.inc"
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.include "hardware.inc"
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title_screen:
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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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; Clear both bottoms
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lda #$4
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sta DRAW_PAGE
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jsr clear_bottom
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lda #$0
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sta DRAW_PAGE
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jsr clear_bottom
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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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; Load background to $c00
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lda #$0c
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sta BASH
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lda #$00
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sta BASL ; load image off-screen $c00
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lda #>(planet_rle)
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sta GBASH
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lda #<(planet_rle)
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sta GBASL
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jsr load_rle_gr
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;=================================
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; copy 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 #22
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sta ADV_Y
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lda #20
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sta ADV_X
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game_loop:
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; check keyboard
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jsr handle_keypress
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; copy background to current page
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; draw adventurer
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lda #>stand_right
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sta INH
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lda #<stand_right
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sta INL
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done_walking:
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lda ADV_X
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sta XPOS
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lda ADV_Y
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sta YPOS
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jsr put_sprite
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; draw bad guys
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; draw foreground
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; page flip
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jsr page_flip
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; pause?
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; loop forever
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jmp game_loop
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;======================================
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; handle keypress
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;======================================
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handle_keypress:
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lda KEYPRESS ; 4
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bpl no_keypress ; 3
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; -1
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bit KEYRESET ; clear the keyboard strobe ; 4
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no_keypress:
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rts ; 6
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;.include "wait_keypress.s"
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.include "gr_pageflip.s"
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.include "gr_unrle.s"
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.include "gr_fast_clear.s"
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.include "gr_copy.s"
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.include "gr_putsprite.s"
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.include "gr_offsets.s"
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.include "ootw_backgrounds.inc"
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.include "ootw_sprites.inc"
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