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bordereffect2.asm
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bordereffect2.asm
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;**********************
;* Gray Defender
;* 02/03/2020
;* Border Effect part 3
;**********************
*=$2000
;******************************************************
; CLEAR SCREEN
;******************************************************
lda #42
ldx #0
@clr_loop sta $400,x
sta $500,x
sta $600,x
sta $700,x
dex
bne @clr_loop
;******************************************************
; HORIZONTAL
;******************************************************
MAIN_PROGRAM
ldx #0
ldy #39
@loop lda COLOR2
sta $d800,x
sta $d800,y
sta $dbc0,y
sta $dbc0,x
jsr delay
lda COLOR1
sta $d800,x
sta $d800,y
sta $dbc0,y
sta $dbc0,x
dey
inx
cpy #0
bne @loop
;******************************************************
; VERTICAL
;******************************************************
ldy #0
sty yvalue+1
sty yyvalue+1
ldy #25
sty yvalue1+1
sty yyvalue1+1
XXLOOP ldx #39
yvalue ldy #0
lda COLOR2
jsr pokecoloraxy
ldx #0
jsr pokecoloraxy
yvalue1 ldy #25
ldx #0
jsr pokecoloraxy
ldx #39
jsr pokecoloraxy
jsr delay
ldx #39
yyvalue ldy #0
lda COLOR1
jsr pokecoloraxy
ldx #0
jsr pokecoloraxy
yyvalue1 ldy #25
ldx #0
jsr pokecoloraxy
ldx #39
jsr pokecoloraxy
inc yvalue+1
inc yyvalue+1
dec yvalue1+1
dec yyvalue1+1
ldy yvalue+1
cpy #25
bne XXLOOP
inc COLOR1
inc COLOR2
JMP MAIN_PROGRAM
;*******************************************
delay
txa
pha
tya
pha
ldx #100
@lp1 ldy #40
@lp2 dey
bne @lp2
dex
bne @lp1
pla
tay
pla
tax
rts
;*******************************************
pokecoloraxy
sta @char+1 ; Save character to poke
lda map_off_l,y ; Load map low byte into $fb
sta @screen+1
lda map_off_hc,y ; Load map high byte into $fc
sta @screen+2
@char lda #$00
@screen sta $d800,x ; Store result in screen memory
rts
COLOR1 byte 00
COLOR2 byte 07
map_off_l byte $00,$28,$50,$78,$A0,$C8,$F0,$18,$40,$68,$90,$b8,$E0,$08,$30,$58,$80,$a8,$d0,$f8,$20,$48,$70,$98,$c0
map_off_h byte $04,$04,$04,$04,$04,$04,$04,$05,$05,$05,$05,$05,$05,$06,$06,$06,$06,$06,$06,$06,$07,$07,$07,$07,$07
map_off_hc byte $D8,$D8,$D8,$D8,$D8,$D8,$D8,$D9,$D9,$D9,$D9,$D9,$D9,$DA,$DA,$DA,$DA,$DA,$DA,$DA,$DB,$DB,$DB,$DB,$DB