mirror of
https://github.com/lscharen/iigs-game-engine.git
synced 2024-09-10 05:54:28 +00:00
157 lines
3.1 KiB
ArmAsm
157 lines
3.1 KiB
ArmAsm
REL
|
|
DSK MAINSEG
|
|
|
|
use EDS.GSOS.MACS.s
|
|
use Tool222.Macs.s
|
|
use ../../src/GTE.s
|
|
use ../../src/Defs.s
|
|
|
|
|
|
mx %00
|
|
|
|
; Space for player position variables
|
|
PlayerX equ AppSpace
|
|
PlayerY equ AppSpace+2
|
|
|
|
; Timer handle
|
|
TimerHndl dw $FFFF
|
|
IntroCounter ds 2
|
|
|
|
phk
|
|
plb
|
|
|
|
jsl EngineStartUp
|
|
|
|
stz PlayerX
|
|
stz PlayerY
|
|
|
|
ldx #0 ; Use full-screen mode
|
|
jsl SetScreenMode
|
|
bcs *+5
|
|
sta TimerHndl
|
|
|
|
|
|
stz IntroCounter
|
|
ldx #^IntroTask
|
|
lda #IntroTask
|
|
ldy #10 ; Play at 6 fps
|
|
jsl AddTimer
|
|
bcs *+5
|
|
sta TimerHndl
|
|
|
|
:loop
|
|
jsl DoTimers
|
|
jsl ReadControl
|
|
and #$007F ; Ignore the buttons for now
|
|
|
|
cmp #'q'
|
|
beq :exit
|
|
|
|
; Just keep drawing the player. The timer task will animate the position
|
|
|
|
jsr DrawPlayer
|
|
bra :loop
|
|
|
|
:moveup
|
|
lda PlayerY
|
|
dec
|
|
bpl *+5
|
|
lda #0
|
|
sta PlayerY
|
|
jmp DrawPlayer
|
|
|
|
:movedown
|
|
lda PlayerY
|
|
inc
|
|
cmp #160
|
|
bcc *+5
|
|
lda #160
|
|
sta PlayerY
|
|
jmp DrawPlayer
|
|
|
|
:moveleft
|
|
lda PlayerX
|
|
dec
|
|
bpl *+5
|
|
lda #0
|
|
sta PlayerX
|
|
jmp DrawPlayer
|
|
|
|
:moveright
|
|
lda PlayerX
|
|
inc
|
|
cmp #140
|
|
bcc *+5
|
|
lda #140
|
|
sta PlayerX
|
|
jmp DrawPlayer
|
|
|
|
; Clean up and do a GS/OS Quit
|
|
:exit
|
|
jsl EngineShutDown
|
|
|
|
:quit
|
|
_QuitGS qtRec
|
|
bcs :fatal
|
|
:fatal brk $00
|
|
|
|
qtRec adrl $0000
|
|
da $00
|
|
|
|
; Play a scripted animation
|
|
IntroTask
|
|
phb
|
|
phk
|
|
plb
|
|
|
|
lda IntroCounter
|
|
and #$0007
|
|
asl
|
|
asl
|
|
tax
|
|
|
|
lda IntroPath,x ; X coordinate
|
|
sta PlayerX
|
|
lda IntroPath+2,x ; Y coordinate
|
|
sta PlayerY
|
|
|
|
inc IntroCounter
|
|
plb
|
|
rtl
|
|
|
|
IntroPath dw 0,0,10,0,20,0,20,5,20,7,35,15,50,17,80,20
|
|
|
|
DrawPlayer
|
|
lda PlayerY
|
|
asl
|
|
tax
|
|
ldal ScreenAddr,x
|
|
clc
|
|
adc PlayerX
|
|
tay
|
|
jsl Spr_001
|
|
rts
|
|
|
|
; Storage for tiles (not used in this demo)
|
|
tiledata ENT
|
|
|
|
; Storage for sprites
|
|
StackAddress ds 2
|
|
PUT sprites/Ships.s
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|