Atari 800

H
<:
00
ATARI 800 CHECKERS DISPLAY B~ ~ SHAW 3/31/80
5652
1690
1.700
. PAGE
1710 , ltllTIALIZATl014 COL•E. -- Sll-tPT E;<:ECIJTJOI~ HE.f'E.
1720 '
5€52
1730 •• PI1B+.700
1.740 ;
1750
1.760
1.770
'5700 A92E
1.780
'5702 8D2F02 1.790
1.800
1.81.0
1.820
'5705 A900
1.830
5707 AA
1.840
1850
'5708 900050 1860
5708 900051 1870
570E 900052 1880
5711 900853 1890
'5714 900054 1900
571.7 E8
1919
5718 00EE
1920
1930
1940
1.950
S71.A A90E
1.960
571.C A05E
1.970
571.E 999451. 1.980
:5721 88
1.990
5722 D0FA
2000
2010
2020
2030
5724 A01.0 2040
5726A9C4
21!150
5728 991.354 2060
5728 99A354 2070
572E 88
2080
572F D0F7
2090
21.00
21.1.0
2120
5731. A9F0
21.30
5733 R20A
21.40
5735 991852 21.'50
5738 9998'52 21.60
5739 991853 21.70
573E 999853 21.80
21.90
; ltHT OS'S DMACTL VARIABLE
; IIISTRUCTION FETCH
DMA ENABLE, P/M 2 LINE RES. P/M DMA ENABLE. STA14DARO SCREEN <160 CLOCKS>
LDA esZE
STA SOMCTL
;CLEAR RAM
LDA e0
TAX
INITLP
STA
Pl'18,)(
STA
PMB+S1.00.X
STA
PI'18+S200.X
STR
PMB+SJ00.X
STR PMB+S400.X
INX
BNE INITLP
; INITIALIZE MISSILE GRAPHICS FOR BORDERS
LQPZ
LDA esee:
LD~ eSSE
STA GRM93+S1.4.~
DEV
BNE LQPZ
;INITIALIZE TOP AND BOTTOM BORDERS.
TBLP
.1.6
eCLBOR+BORDER
TOPBRD-1..
~
BOTBRD-1..~
L~
LDA
STA
STA
DEV
Bt£ TBLP ; CONTINUE UNTJ L ~=0
; INITIALIZE PLA'<ER GRAPHICS FOR SQUARES <CHECKER BOARD> ~·0
LDA eSF0
IN2 LDX e10
IN3 STA GRP0+$18.Y
STA GRP1.+S1.8,Y
STA
GRP2+$1.8.~
STA GRP3+S1.8,V
\