File BOUBALL3

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#9W LDA
7K
STO
1Y  [YZERO TO Y
LDA
1N
STO
1A  [1 TO ALPHA
LDA
8K
STO
1B [ZERO TO BETA
LDA
1M
CAA
1N
STO
1X [XMIN TO X
LDA
3C
STO
9K
#1W JSR
1D
JSR
1D
JSR
1D
JSR
1D
LDA
1A
ADD
1K
STO
1A [ALPHA - 2
ADD
1B
STO
1T
ADD
1Y
STO
1Y [Y+ETC.
ADD
1M
BZA
2W [Y MIN
#3W LDA
1X
ADD
9K
STO
1X [X+DELTA X
BOS
5W
#6W LDA
2K
STO
1C
LDA
3K
STO
2C
JSR
1P [POINT PAUSE
TRC
1W
#4W LDA
5K
STO
1C
LDA
6K
STO
2C
JSR
1P [DROP PAUSE
TRC
9W
[PAUSE-SUBROUTINE
#2P TRC
#1P 0
LDA
2C
ADD
4K
BNV
p-3
LDA
1C
ADD
4K
STO
1C
BNV
1P+1
TRC
2P
[DISPLAY SUBROUTINE
#2D TRC
#1D 0
LDA
1X
STO
1T
LDA
1Y
SLL
SLL
DIS
DIS
DIS
DIS
TRC
2D
#2W LDA
9K
SCA
SCA
SCA
SCA
CAA
1N
ADD
9K
STO
9K
BZA
4W
CAD
1T
CAA
1N
STO
1T
SCA
SCA
SCA
CAA
1N
ADD
1T
STO
1B
BRP
p+3
LDA
8K
STO
1B
BZA
p+7
LDA
1N
STO
1A
TRC
3W
LDA
1N
SLL
TRC
p-10
#5W CAA
8K [COM X
STO
1X [INTO X
LDA
9K
SCA
SCA
SCA
CAA
1N
ADD
9K
CAA
1N
STO
9K
TRC
6W
#1C 0
#2C 0
#1X 0
#1Y 0
#1A 0
#1B 0
#1K 7776
#2K 4000 [OUTER PP
#3K 4100 [INNER PP
#4K 7777
#5K 4000 [OUTER DP
#6K 777 [INNER DP
#7K 614
#8K 0
#9K 4
#1M 770
#1N 1
#1T 0
#3C 40 [DELTA X ZERO



Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with.  I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation. 

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