Sprite/movesprite
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Das Assembler-Programm movesprite demonstriert die Bewegung eines Sprites und zeigt dabei seine Position an.
;********************************************************************************************
;* create and move a simple sprite with coordinates displayed, (2021/22) by petrus *
;* based on David Roberts program at https://gist.github.com/biomood/1001256 *
;* openborder routine by "tonyp12" William Wobbler *
;* https://www.lemon64.com/forum/viewtopic.php?t=71739&sid=622fcffdd29a5588bdfa6c4ba17c825c *
;********************************************************************************************
!to "movesprite_v4.prg", cbm
!ct pet
;useful rom routines
strout = $ab1e ;stradr in (A/Y)
clear = $e544
getin = $ffe4
scnkey = $ff9f
bsout = $ffd2
;sprite0 settings
sprite0 = $07f8
color0 = $d027
sp0x = $d000
sp0y = $d001
msbx = $d010
control1= $d011
sp0val = $0340
enable = $d015
control2= $d016
yexpand = $d017
xexpand = $d01d
priority= $d01b
;colors
color = $0286
border = $d020
backgr = $d021
* = $0801 ; BASIC start
!byte $0b,$08,$0a,$00,$9e,$32,$30,$36,$34,$00 ;10 SYS 2064
* = $0810 ;2064
lda #6 ;blue
sta backgr
lda #14 ;lightblue
sta border
sta color
jsr clear
jsr infos
lda #$0d ;using block 13 for sprite0
sta sprite0
lda #01 ;enable sprite0
sta enable
sta priority ;sprite0 behind text
lda #7 ;use yellow for sprite0
sta color0
ldx #0
lda #0
;reset the spriteval data
cleanup sta sp0val,x
inx
cpx #63
bne cleanup
;build the sprite
ldx #0
build lda data,x
sta sp0val,x
inx
cpx #63
bne build
jsr init ;set sprite0 startcoordinates
entry lda #1
sta $0289 ;disable keyboard buffer
lda #64
sta $028a ;disable key repeat
scan jsr dspxy
sckey jsr scnkey ;get key
jsr getin ;put petscii into .A
start cmp #145 ;crsr-up
bne cdown
ldy sp0y
dey
sty sp0y
jmp scan
cdown cmp #17 ;crsr-down
bne cleft
ldy sp0y
iny
cy sty sp0y
jmp scan
cleft cmp #157 ;crsr-left
bne cright
dec sp0x
ldx sp0x
cpx #255
bne le
lda msbx
eor #1
cxl sta msbx
le jmp scan
cright cmp #29 ;crsr-right
bne home
inc sp0x
ldx sp0x
cpx #0
bne re
lda msbx
eor #1
sta msbx
re jmp scan
home cmp #19
bne top
jsr init
jmp scan
top cmp #84 ;'t'
bne bottom
ldy #50
bne cy
bottom cmp #66 ;'b'
bne bleft
ldy #229
bne cy
bleft cmp #76 ;'l'
bne bright
lda #0 ;sta msbx
ldx #24
stx sp0x
bne cxl
bright cmp #82 ;'r'
bne plus
ldx #64 ;320 and 255
stx sp0x
lda #$01
sta msbx
jmp scan
plus cmp #43 ;plus
bne swscr1
lda color0
eor #5 ;toggle 7<->2 (ylw/red)
sta color0
lda $028a ;repeat-flag
eor #64 ;toggle on/off
sta $028a
jmp scan
swscr1 cmp #87 ;W (width)
bne swscr2
jsr scrcols ;toggle 40/38 columns
jmp scan
swscr2 cmp #72 ;H (height)
bne xexp
jsr scrlines ;toggle 25/24 lines
jmp scan
xexp cmp #88 ;X
bne yexp
lda xexpand
eor #1
sta xexpand
jmp scan
yexp cmp #89 ;Y
bne bopn
lda yexpand
eor #1
sta yexpand
jmp scan
bopn cmp #79 ;O : open Border
bne bclos
jsr opbd
jsr crnchr
jmp scan
bclos cmp #67 ;C : close Border
bne entr
jsr crnclr
jsr clbd
jmp scan
entr cmp #13 ;end if enter
beq end
jmp sckey
;clean up at the end
end jsr clear
lda #0
sta enable
rts
;position
init lda #0 ;stick with x0-255
sta msbx
;starting sprite location
ldx #168
ldy #170
stx sp0x
sty sp0y
rts
dspxy lda #1 ;white
sta color
ldx #12
ldy #18
clc
jsr $fff0 ;setcrsr
lda msbx
ldx sp0x
jsr $bdcd ;dsp 16-bit number
jsr spcout
ldx #13
ldy #18
clc
jsr $fff0 ;setcrsr
lda #0
ldx sp0y
jsr $bdcd ;dsp 16-bit number
jsr spcout
lda #14
sta color
rts
spcout lda #$20 ;2x space
jsr bsout
jsr bsout
rts
scrcols lda control2
eor #$08
sta control2
rts
scrlines lda control1
eor #$08 ;do not use this if using raster irqs
sta control1
rts
infos lda #<info1
ldy #>info1
jsr strout
lda #<info2
ldy #>info2
jsr strout
rts
info1 !by $0d
!tx " move sprite with cursor ",$0d
!tx " 't','b','l','r': jump to border",$0d
!tx " 'home' jump to start position ",$0d
!tx " '+' toggle key repeat ",$0d
!tx " 'w' toggle screen columns 40/38",$0d
!tx " 'h' toggle screen lines 25/24",$0d
!tx " 'x' x-expand sprite ",$0d,0
info2 !tx " 'y' y-expand sprite ",$0d
!tx " 'o' open / 'c' close border ",$0d
!tx " 'return' end programm ",0
;define the sprite
data !byte %########,%########,%########
!byte %#....###,%########,%########
!byte %#....###,%########,%########
!byte %#....###,%########,%########
!byte %#....###,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
!byte %########,%########,%########
;--- open border (by tonyp12) -------------------
opbd sei ; set interrupt bit, make the cpu ignore interrupt requests
lda #%01111111 ; switch off interrupt signals from cia-1
sta $dc0d
and $d011 ; clear most significant bit of vic's raster register
sta $d011
lda $dc0d ; acknowledge pending interrupts from cia-1
lda $dd0d ; acknowledge pending interrupts from cia-2
ldx #<irq ; set interrupt vectors, pointing to interrupt service routine below
stx $0314
ldx #>irq
stx $0315
ldx #%00000001 ; enable raster interrupt signals from vic
stx $d01a
dex ; was a one above
stx $3fff ; clear garbage
cli ; clear interrupt flag, allowing the cpu to respond to interrupt requests
rts
irq asl $d019 ; acknowledge the interrupt by clearing the vic's interrupt flag
selfmod ldx #0-0 ; 249 or 27
stx $d012 ; set next rasterline where interrupt shall occur
bmi restore25 ; branch if bit 7 set
ldx #249 ; value over 128 is a 'minus'
stx selfmod+1
ldx #$13 ; set 24 rows, has to be be done on line 249
stx $d011 ; scrolly trick for no border
jmp $ea31 ; keyboard scan
restore25 ldx #$1b ; decimal 27
stx $d011 ; undo scroll on any other line
stx selfmod+1 ; set rasterline where interrupt shall occur
jmp $ea81 ; no keyboard scan
;------------------------
clbd sei
lda #%01111111
sta $dc0d
and $d011
sta $d011
lda $dc0d
lda $dd0d
ldx #$31 ; restore interrupt vector
stx $0314
ldx #$ea
stx $0315
ldx #%00000000 ; disable raster interrupt signals from vic
stx $d01a
cli ; clear interrupt flag
rts
crnchr lda #99
ldy #100
bne poke
crnclr lda #32
tay
poke sta $0400
sta $0400+39
sty $0400+960
sty $0400+999
rts
.end
