mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2024-07-01 18:29:27 +00:00
125 lines
2.6 KiB
ArmAsm
125 lines
2.6 KiB
ArmAsm
REL
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DSK MAINSEG
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use EDS.GSOS.MACS.s
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use Tool222.Macs.s
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use ../../src/GTE.s
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use ../../src/Defs.s
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mx %00
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; Space for player position variables
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PlayerX equ AppSpace
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PlayerY equ AppSpace+2
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phk
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plb
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jsl EngineStartUp
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stz PlayerX
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stz PlayerY
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ldx #0 ; Use full-screen mode
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jsl SetScreenMode
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:loop
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jsl ReadControl
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and #$007F ; Ignore the buttons for now
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cmp #'q'
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beq :exit
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; WASD for player movement
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cmp #'w'
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bne :not_w
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jsr :moveup
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brl :loop
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:not_w
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cmp #'a'
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bne :not_a
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jsr :moveleft
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brl :loop
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:not_a
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cmp #'s'
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bne :not_s
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jsr :movedown
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brl :loop
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:not_s
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cmp #'d'
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bne :not_d
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jsr :moveright
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:not_d
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brl :loop
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:moveup
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lda PlayerY
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dec
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bpl *+5
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lda #0
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sta PlayerY
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jmp DrawPlayer
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:movedown
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lda PlayerY
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inc
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cmp #160
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bcc *+5
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lda #160
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sta PlayerY
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jmp DrawPlayer
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:moveleft
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lda PlayerX
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dec
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bpl *+5
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lda #0
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sta PlayerX
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jmp DrawPlayer
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:moveright
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lda PlayerX
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inc
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cmp #140
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bcc *+5
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lda #140
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sta PlayerX
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jmp DrawPlayer
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; Clean up and do a GS/OS Quit
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:exit
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jsl EngineShutDown
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:quit
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_QuitGS qtRec
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bcs :fatal
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:fatal brk $00
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qtRec adrl $0000
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da $00
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DrawPlayer
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lda PlayerY
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asl
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tax
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ldal ScreenAddr,x
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clc
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adc PlayerX
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tay
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jsl Spr_001
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rts
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; Storage for tiles (not used in this demo)
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tiledata ENT
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; Storage for sprites
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StackAddress ds 2
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PUT sprites/Ships.s
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