General Information #
Author: Chris PageLanguage: ACTION!
Compiler/Interpreter: ACTION!
Published: Analog #38 (01/ 86)
Air Hockey#
Air Hockey is written in Action! and must be compiled off of a disk or tape (the source and object code won't fit in memory together). So type it in. SAVE it, clear the editor, go to the monitor and RUN it, thusly: R "FILENAME“ (substituting the device and filename you saved it under for “FILENAME" — I used “D:AIRHOCKE.Y”).
Once you have it running properly, you should see the title screen and hear the title music (the “Peter Gunn" bass line). Press START.
Now you should see the options screen (it has the word OPTIONS at the top). You can use the OPTION key to highlight a different option. SELECT to change the option and START to play the game.
The options available in Air Hockey are:
Friction — This can be ON or OFF. If the friction is on, the puck will have a tendency to slow down while travelling across the board. You may notice that it sometimes curves as it slows down. This is because I used integer values instead of floating point. This means that the motion is not 100 percent accurate, resulting in the curved motion of the puck.
Velocity — This can be 2 through 9 and indicates the maximum velocity of the puck. Option 2 is slowest; 9 is fastest.
Bounce — This can be 0 through 9, indicating the amount of “bounce" to the puck, or how well it retains velocity after hitting the side of the board. A 9 means that the puck will not slow down on collision; 0 indicates very little bounce and will cause the puck to slow down considerably if it hits the sides.
Win — This is the score up to which the player(s) will play. It can be from 10 to 90, in increments of 10.
Players — Either 1 or 2. If one paver is selected, then the player should use joystick port 1 and control the top player; the computer will control player two, the bottom player. If two players are selected, then it's the same, except that player two will be controlled by joystick port 2.
Playing.#
Once your options are set (or left alone, if you like the default settings) you may press START to play. You'll then see a vertical air hockey board with the scores displayed at the top., along with the score necessary to win the game. T he puck will appear in front of the serving player's paddle. That player must hit the puck to start the game.The game is something like Pong, with forward motion as well as side-to-side. Players control the paddles by moving the joystick in the direction they wish to move. The buttons do nothing. A score is made when the puck goes into the yellow goal area of a player, and the other player becomes the server.
If the puck gets stuck between players, as it can in real air hockey, you may re-serve by pressing the SPACE BAR. Also, while in the play mode, you may press the ESCape key to exit the program. Finally, if you want to restart the game. press START anytime during the game (except during the goal sequence), and you'll be returned to the options screen.
When the game is over, there's a long cheering sequence with whistling fans (if the crowd likes you) before you‘re returned to the title screen.
Why I did it or a tail of two ducks.#
I was sitting around one day (I do that quite a lot) last summer, had just bought Action! and was becoming familiar with it. After writing some demos, I was ready to do something more substantial with it.I figured that a good way to utilize Action!‘s speed was to write some kind of fast-paced, arcade-type game. But I didn't want to write another space game or Pac-Man. I wanted to write something different and unique. Air Hockey may not be a completely unique game (it is similar to Pong). but it's different, and a change of pace from "Laser the Aliens"
A lesson in compromise or the quacker in the rye.#
This program is an example of inventiveness, procrastination and compromise. "Inventive” because. . .well, it's a matter of opinion. but I think it's inventive. “Procrastination" because I dropped the project for several months at a time (check out the start and completion dates in the source listing). Finally, and most decidedly, "compromise" because I made so many of these concerning Air Hockey.Two of my main compromises were:
- I wanted more options and a complete title song, but time and a willingness to work (or the lack thereof) got in the way.
- Everyone, including myself, thought that the paddles should have been round. But that requires physics. . .I barely passed physics. If I'd made the paddles round, as they are in real life, I would have had to resort to "real" physics instead of the chintzy method I did use.
In physics, you use vectors to describe how objects move, but this is a difficult thing in integers (well, difficult for me), which is what I was stuck with in Action! So I simply gave a horizontal and vertical speed and a horizontal and vertical direction.
These two compromises, however, were not as difficult or as important as my final compromise. I had to compromise on the one aspect, the most difficult thing, that every programmer must: completion of my goal. I had to stop work on a program which I felt was incomplete and short of my goals, and call it finished.
I realized this when I was telling my friends that I'd have to add the treble line to the title music before I'd submit it for publishing. As I told them this, I realized that the game is rather simple (as it was supposed to be) and that a full-blown song was superfluous. I than realized that other things I wanted to add were also not needed.
Actually. I had already met my goal (design a simple game as an exercise in Action!), but in the process, I'd created other goals—like adding the treble line.
I realized that I would continue creating goals as long as I was working on it; I would never finish the game. I'd sit, perma-bonded to my video screen, for the next ten years working on Air Hockey until it was 3-D, talked and had instant replay, a high score list, a theme song to put "Flight of the Valkyries" to shame, and a thousand other things... and I would still want to change something.
Program design and some ducks thrown in for effect.#
I think the important thing here is to realize that, when you want to write a program, you should decide exactly what it will be like, so that you can say it is finished when it meets the description. I certainly did not. l designed and wrote it as I went along (this is painfully evident to me in the lack of unity and consistency in the program, the "patchwork quilt" look).This has also led to my big problem: because the program is so disorganized, I invariably come to some sort of dead end and drop the project. I completely gave up on Air Hockey many months back, but, at the urging of two of my friends (D.S. and D.B.), I picked it up again and trudged through the tangled code to finish it. . .finally. This is what has kept me from finishing the other hundred or so projects I have stored away in dusty disk files.
I'm sure that if it were not for this fact, there would be thousands more programs available for computers through other users, magazines and distributors. Next time you start to put something off because it seems too difficult, back up and try again.
Oh yes, the ducks.#
The ducks? Well, I thought I'd try to be a little different from the other articles gracing this magazine’s fine pages. (You wondered about them, didn’t you?) Have a duck., you'll feel better.Chris Page is an eighteen-year-old from San Diego, who's studying for on A.A. degree in electronics at I.T.T. Technical Institute. He has worked with computers for seven years and owned on Atari 800 for four. His primary computing interests are in sound, graphics and human interfacing.
Listing 1
; ================
; = Air Hockey =
; = by =
; = Chris Page =
; ================
; Copyright (c) 1985 ANALOG Computing
; Special Thanks to:
; David Sullivan & David Becker
DEFINE
OPTION="3",SELECT="5",START="6",
NONE="7",LEFT="96",RIGHT="60",
TOP="56",BOT="144"
BYTE
NINDEX,VOLUME,FRICTION=[1],
BOUNCE=[90],WIN=[10],PLAYERS=[2],
HUE,LUM,OPT,PUCKXD,PUCKYD,HITFLAG,
SERVER,GAMEOVER,SERVEIT,SDMCTL=559,
CONSOL=53279,CHACT=755,WSYNC=54282,
VCOUNT=54283,CRSINH=752,
COLOR0=53270,COLOR1=53271,
COLOR2=53272,COLOR3=53273,
COLOR4=53274,RTCLOK=20,
DMACTL=54272,LMARGN=82,RMARGN=83,
CHBAS=756,PMBASE=54279,
HITCLR=53278,P2PL=53262,
GRACTL=53277,GPRIOR=623,
RANDOM=53770,COLPM0=53266,
COLPM1=53267,CH=764,RAMTOP=106,
AUDCTL=53768,ATRACT=77,KEY
BYTE ARRAY
DLIST,SCRMEM,RAMFONT,PMMEM($800),
BAR(0)=[$FF$FF],
PUCK(0)=[$60$F0$F0$F0$F0$F0$F0$60],
TTOP(0)=['Q'R'R'R'R'R'R'S'S'S'S'R
'R'R'R'R'R'E],
TMID(0)=['R'T'T'T'T'T'T'T'T'T'T'T
'T'T'T'T'T'R],
TBOT(0)=['Z'R'R'R'R'R'R'S'S'S'S'R
'R'R'R'R'R'C],
NOTE(0)=[243 243 217 243 204 243
193 204],
YTOP(0)=[6 80],YBOT(0)=[62 144],
SCORE(2),PDLX(2),PDLY(2),OSTIK(2),
ROMSET($400)=$E000,HPOSP(4)=53248,
HPOSM(4)=53252,PCOLR(4)=704
CARD
PUCKXV,PUCKYV,PUCKX,PUCKY,
MAXV=[500],DLISTL=560,SAVMSC=88,
XITVBV=$E462
; --- Miscellaneous Procedures ---
PROC SETVBV=$E45C(BYTE CMD,VBIHI,
VBILO)
PROC VBI()
; VBI to play music
SOUND(0,NOTE(NINDEX),10,VOLUME)
SOUND(1,NOTE(NINDEX)-2,10,VOLUME)
VOLUME==-1
IF VOLUME=0 THEN
VOLUME=15
NINDEX==+1
IF NINDEX=8 THEN
NINDEX=0
FI
FI
; JMP XITVBV
[$4C XITVBV]
RETURN
PROC INITVBI()
; Initialize music VBI
NINDEX=0
VOLUME=15
SNDRST()
; set deferred vbi vector
SETVBV(7,VBI RSH 8,VBI)
RETURN
PROC DEBOUNCE()
CARD I
; Debounce console keys
FOR I=0 TO 5000 DO
DO
UNTIL CONSOL=NONE
OD
OD
RETURN
; --- Title Screen ---
PROC INITTITLE()
BYTE I
; Initialize title screen
GRAPHICS(0)
GPRIOR=17
GRACTL=0
SDMCTL=0
CRSINH=1
HUE=0
DLIST=DLISTL
DO
UNTIL VCOUNT=0
OD
FOR I=3 TO 5 DO
DLIST(I+7)=DLIST(I)
OD
SETBLOCK(DLIST,10,$70)
FOR I=13 TO 25 STEP 2 DO
DLIST(I)=0
OD
SETBLOCK(DLIST+27,2,$70)
SETCOLOR(1,0,14)
SETCOLOR(2,0,8)
POSITION(11,0)
PRINT("Air Hockey")
POSITION(1,1)
PRINT("By: Chris Page")
POSITION(29,1)
PRINT("Thanks: D.S. and D.B.")
POSITION(17,2)
PRINT(
"June 30, 1984 - August 9, 1985")
POSITION(7,4)
PRINT("Copyright (c) 1984")
POSITION(34,5)
PRINT("Press START")
SDMCTL=33
RETURN
PROC TITLECOLORS()
BYTE I
; Mid-screen color changes
HUE==+2
IF HUE&2 THEN
CHACT==+1&3
FI
FOR I=0 TO 30 DO
DO
WSYNC=0
COLOR4=VCOUNT LSH 1+HUE
IF VCOUNT=48 THEN
COLOR1=0
FI
UNTIL VCOUNT&128
OD
OD
RETURN
PROC TITLE()
; Display title screen
INITTITLE()
INITVBI()
DO
TITLECOLORS()
UNTIL CONSOL=START
OD
SDMCTL=0
RETURN
; --- Game Options ---
PROC INITOPTIONS()
; Initialize procedure OPTIONS()
GRAPHICS(17)
SDMCTL=0
GRACTL=0
DO
UNTIL VCOUNT=0
OD
DEBOUNCE()
SCRMEM=SAVMSC
DLIST=DLISTL
DLIST(3)==+1
SETCOLOR(0,3,14)
SETCOLOR(2,0,14)
PRINTDE(6," GAME OPTIONS")
POSITION(0,2)
PRINTD(6,"OPTION - NEXT OPTION")
PRINTDE(6,"SELECT - CHOOSE")
PRINTDE(6," START - PLAY GAME")
POSITION(3,6)
PRINTD(6,"FRICTION: O")
IF FRICTION THEN
PRINTD(6,"N")
ELSE
PRINTD(6,"FF")
FI
POSITION(3,8)
PRINTD(6,"VELOCITY: ")
PRINTBD(6,MAXV/100)
POSITION(3,10)
PRINTD(6,"BOUNCE : ")
PRINTBD(6,BOUNCE/10)
POSITION(3,12)
PRINTD(6,"WIN AT : ")
PRINTBD(6,WIN)
POSITION(3,14)
PRINTD(6,"PLAYERS : ")
PRINTBD(6,PLAYERS)
SDMCTL=34
OPT=0
RETURN
PROC OPTIONCOLORS(BYTE OPT)
; Mid-screen color changes
; OPT=option line to hi-light
DO
WSYNC=0
UNTIL VCOUNT=15
OD
LUM=0
WSYNC=0
DO
WSYNC=0
COLOR0=LUM&$0F%$20
LUM==+2
UNTIL VCOUNT=25
OD
WSYNC=0
COLOR0=0
COLOR4=6
DO
WSYNC=0
UNTIL VCOUNT=40
OD
COLOR0=$F8
OPT==LSH 3+41
DO
WSYNC=0
UNTIL VCOUNT=OPT
OD
COLOR0=$FE
DO
WSYNC=0
UNTIL VCOUNT=OPT+8
OD
COLOR0=$F8
RETURN
PROC OPTIONS()
CARD I
; Get game options from player(s)
INITOPTIONS()
DO
FOR I=0 TO 10 DO
OPTIONCOLORS(OPT)
UNTIL CONSOL=START
OD
IF CONSOL=OPTION THEN
OPT==+1
IF OPT=5 THEN
OPT=0
FI
FI
IF CONSOL=SELECT THEN
IF OPT=0 THEN
FRICTION==!1
IF FRICTION THEN
SCRMEM(134)=46
SCRMEM(135)=0
ELSE
SCRMEM(134)=38
SCRMEM(135)=38
FI
ELSEIF OPT=1 THEN
IF MAXV=900 THEN
SCRMEM(173)==-7
MAXV=200
ELSE
SCRMEM(173)==+1
MAXV==+100
FI
ELSEIF OPT=2 THEN
IF BOUNCE=90 THEN
SCRMEM(213)==-9
BOUNCE=0
ELSE
SCRMEM(213)==+1
BOUNCE==+10
FI
ELSEIF OPT=3 THEN
IF WIN=90 THEN
SCRMEM(253)==-8
WIN=10
ELSE
SCRMEM(253)==+1
WIN==+10
FI
ELSE
IF PLAYERS=2 THEN
SCRMEM(293)==-1
PLAYERS=1
ELSE
SCRMEM(293)==+1
PLAYERS=2
FI
FI
FI
UNTIL CONSOL=START
OD
SDMCTL=0
SNDRST()
RETURN
; --- Play Air Hockey ---
PROC MAKEFONT()
BYTE I
CARD J
; Change character set
BYTE ARRAY
CDAT(8)=[$55$55$55$55$54$54$50$40],
EDAT(8)=[$40$50$54$54$55$55$55$55],
QDAT(8)=[$01$05$15$15$55$55$55$55],
RDAT(8)=[$55$55$55$55$55$55$55$55],
SDAT(8)=[$FF$FF$FF$FF$FF$FF$FF$FF],
TDAT(8)=[$AA$AA$2A$AA$AA$AA$A2$AA],
ZDAT(8)=[$55$55$55$55$15$15$05$01]
RAMFONT=(RAMTOP-8)*$100
MOVEBLOCK(RAMFONT,ROMSET,$400)
ZERO(RAMFONT+536,192)
CHBAS=RAMTOP-8
SDMCTL=61
FOR I=0 TO 7 DO
FOR J=0 TO 3000 DO OD
RAMFONT(536+I)=CDAT(I)
RAMFONT(552+I)=EDAT(I)
RAMFONT(648+I)=QDAT(I)
RAMFONT(656+I)=RDAT(I)
RAMFONT(664+I)=SDAT(I)
RAMFONT(672+I)=TDAT(I)
RAMFONT(720+I)=ZDAT(I)
OD
RETURN
PROC POSPLAYER(CARD PLAYER
BYTE X,Y,LENGTH
BYTE ARRAY SHAPE)
; Position Player
HPOSP(PLAYER)=X+LEFT
PLAYER==*$100+$400
MOVEBLOCK(PMMEM+PLAYER+Y+TOP,
SHAPE,LENGTH)
RETURN
PROC POSPDL(BYTE PADDLE,X,Y)
; Position paddle
POSPLAYER(PADDLE,X,Y,2,BAR)
RETURN
PROC POSPUCK(CARD X,Y)
; Position puck
X==/100
Y==/100
POSPLAYER(2,X,Y,8,PUCK)
RETURN
PROC ERASEPDL(CARD PADDLE BYTE Y)
; Erase paddle
PADDLE==*$100+$400
ZERO(PMMEM+PADDLE+Y+TOP,2)
RETURN
PROC ERASEPUCK(CARD Y)
; Erase puck
Y==/100+TOP
ZERO(PMMEM+$600+Y,8)
RETURN
PROC ERASEALL()
; Clear Player memory
ERASEPDL(0,PDLY(0))
ERASEPDL(1,PDLY(1))
ERASEPUCK(PUCKY)
RETURN
PROC INITPMG()
; Initialize PMG
PMMEM=(RAMTOP-16)*$100
Zero(PMMEM,$800)
PCOLR(0)=$76
PCOLR(1)=$76
PCOLR(2)=$36
PMBASE=RAMTOP-16
GRACTL=3
RETURN
PROC INITPLAY()
CARD I
; Initialize game
GRAPHICS(0)
SDMCTL=0
DO
UNTIL VCOUNT=0
OD
SETVBV(7,$E4,$62)
SNDRST()
DEBOUNCE()
INITPMG()
SCRMEM=SAVMSC
SCORE(0)=0
SCORE(1)=0
OSTIK(0)=15
OSTIK(1)=15
SERVER=0
GAMEOVER=0
CRSINH=1
DLIST=DLISTL
DLIST(2)=DLIST(3)+4
DLIST(3)=DLIST(4)
DLIST(4)=DLIST(5)
DLIST(5)=$30
DLIST(7)=$30
SETBLOCK(DLIST+8,21,4)
SETCOLOR(0,3,6)
SETCOLOR(1,0,14)
SETCOLOR(2,0,4)
SETCOLOR(3,2,14)
SETCOLOR(4,0,6)
POSITION(3,0)
PRINTE("air hockey")
SAVMSC==+16
POSITION(0,0)
PRINTF(
" One : 00 | Win : %B | Two : 00",
win)
MOVEBLOCK(SCRMEM+55,TTOP,18)
FOR I=87 TO 663 STEP 32 DO
MOVEBLOCK(SCRMEM+I,TMID,18)
OD
MOVEBLOCK(SCRMEM+695,TBOT,18)
MAKEFONT()
SOUND(3,0,0,3)
KEY=0
CH=$FF
RETURN
PROC SERVE(BYTE PLAYER)
CARD I
; Initialize positions
ERASEALL()
PDLX(0)=28
PDLX(1)=28
PDLY(0)=YTOP(0)
PDLY(1)=YBOT(1)
PUCKX=3000
PUCKY=4000+6800*PLAYER
PUCKXV=0
PUCKYV=0
POSPDL(0,PDLX(0),PDLY(0))
POSPDL(1,PDLX(1),PDLY(1))
POSPUCK(PUCKX,PUCKY)
HITCLR=0
HITFLAG=0
VOLUME=0
RETURN
PROC MOVEPADDLE(BYTE P)
BYTE STIK
; Move paddle
ERASEPDL(P,PDLY(P))
STIK=STICK(P)
; move puck 2 for one player game
IF PLAYERS=P THEN
STIK=$F
IF PDLX(1)+2<PUCKX/100 THEN
STIK==-8
ELSE
STIK==-4
FI
IF PDLY(1)-6<PUCKY/100 THEN
STIK==-2
ELSEIF PDLY(1)-8>PUCKY/100 THEN
STIK==-1
ELSE
STIK==-2
IF RAND(2) THEN
STIK==+1
FI
FI
FI
; save stick position
OSTIK(P)=STIK
; move paddle verticaly
IF (STIK&1)=0 THEN
PDLY(P)==-2
IF PDLY(P)<YTOP(P) THEN
PDLY(P)=YTOP(P)
FI
ELSEIF (STIK&2)=0 THEN
PDLY(P)==+2
IF PDLY(P)>YBOT(P) THEN
PDLY(P)=YBOT(P)
FI
FI
; move paddle horizontaly
IF (STIK&8)=0 THEN
PDLX(P)==+2
IF PDLX(P)>RIGHT-4 THEN
PDLX(P)=RIGHT-4
FI
ELSEIF (STIK&4)=0 THEN
PDLX(P)==-2
IF PDLX(P)>240 THEN
PDLX(P)=0
FI
FI
POSPDL(P,PDLX(P),PDLY(P))
RETURN
PROC REVERSEPX()
; Reverse horizontal puck direction
VOLUME=14
PUCKXD==!1
IF PUCKXV<(90-BOUNCE) THEN
PUCKXV=0
ELSE
PUCKXV==-(90-BOUNCE)
FI
RETURN
PROC REVERSEPY()
; Reverse vertical puck direction
VOLUME=14
PUCKYD==!1
IF PUCKYV<(90-BOUNCE) THEN
PUCKYV=0
ELSE
PUCKYV==-(90-BOUNCE)
FI
RETURN
PROC MOVEPUCK()
BYTE PADDLE,XDIF,YDIF,STIK,ABOVE
CARD ARRAY
XVELOC(0)=[400 140 100 80 40 0
40 80 100 140 400]
; Move the puck
ERASEPUCK(PUCKY)
; check for paddle collisions
PADDLE=0
IF PUCKY/100>70 THEN
PADDLE=1
FI
STIK=OSTIK(PADDLE)
IF P2PL THEN
IF HITFLAG=0 THEN
VOLUME=14
; new x velocity & direction
XDIF=PUCKX/100+3-PDLX(PADDLE)
PUCKXV=XVELOC(XDIF)
PUCKXD=0
IF XDIF>5 THEN
PUCKXD=1
FI
; new y velocity & direction
YDIF=PUCKY/100-PDLY(PADDLE)
ABOVE=0
IF PADDLE THEN
IF PUCKY/100<PDLY(1) THEN
ABOVE=1
FI
ELSE
IF PUCKY/100+8<PDLY(0) THEN
ABOVE=1
FI
FI
; paddle not moving
IF (STIK&3)=3 THEN
PUCKYD==!1
; puck not moving
ELSEIF PUCKYV=0 THEN
PUCKYV=200
PUCKYD=0
IF (STIK&3)=1 THEN
PUCKYD=1
FI
; puck and paddle equal y coord
ELSEIF PUCKY/100+3=PDLY(PADDLE)
THEN
; do nothing
ELSE
; moving puck and paddle down
IF PUCKYD=1 AND (STIK&3)=1
THEN
IF ABOVE THEN
PUCKYV==-200
IF PUCKYV>200 THEN
PUCKYD==!1
FI
ELSE
PUCKYV==+200
FI
ELSEIF PUCKYD=0 AND
(STIK&3)=2 THEN
IF ABOVE=0 THEN
PUCKYV==-200
IF PUCKYV>200 THEN
PUCKYD==!1
FI
ELSE
PUCKYV==+200
FI
ELSEIF PUCKYD=1 AND
(STIK&3)=2 THEN
IF ABOVE THEN
PUCKYD==!1
PUCKYV==+200
FI
ELSEIF PUCKYD=0 AND
(STIK&3)=1 THEN
IF ABOVE=0 THEN
PUCKYD==!1
PUCKYV==+200
FI
FI
FI
FI
HITFLAG=1
ELSE
HITFLAG=0
FI
HITCLR=0
; move horizontaly
IF PUCKXV>MAXV THEN
PUCKXV=MAXV
FI
IF PUCKXD THEN
PUCKX==+PUCKXV
ELSE
PUCKX==-PUCKXV
FI
; check boundaries
IF PUCKX>24000 THEN
REVERSEPX()
PUCKX=0
ELSEIF PUCKX>RIGHT*100 THEN
REVERSEPX()
PUCKX=RIGHT*100
FI
IF PUCKYV>MAXV THEN
PUCKYV=MAXV
FI
; move verticaly
IF PUCKYD THEN
PUCKY==+PUCKYV
ELSE
PUCKY==-PUCKYV
FI
; check boundaries
IF PUCKY>24000 THEN
REVERSEPY()
PUCKY=0
ELSEIF PUCKY>BOT*100 THEN
REVERSEPY()
PUCKY=BOT*100
FI
; handle friction
IF PUCKXV THEN
PUCKXV==-FRICTION
FI
IF PUCKYV THEN
PUCKYV==-FRICTION
FI
; fading collision sound
IF VOLUME THEN
VOLUME==-2
SOUND(0,10,8,VOLUME)
SOUND(1,10,10,VOLUME)
ELSE
SOUND(0,0,0,0)
SOUND(1,0,0,0)
FI
POSPUCK(PUCKX,PUCKY)
RETURN
PROC GOAL(BYTE PLAYER)
BYTE I
CARD J
; Inc score, check for a winner
SNDRST()
ERASEPUCK(PUCKY)
VOLUME=0
SERVEIT=1
SERVER=PLAYER
SCORE(PLAYER)==+1
IF SCORE(PLAYER)=WIN THEN
GAMEOVER=1
FI
; flash score
FOR I=0 TO 5 DO
SETBLOCK(SCRMEM+23+22*PLAYER,2,0)
FOR J=0 TO 5000 DO OD
SCRMEM(23+22*PLAYER)=
16+SCORE(PLAYER)/10
SCRMEM(24+22*PLAYER)=
16+SCORE(PLAYER) MOD 10
SOUND(0,20,10,8)
FOR J=0 TO 5000 DO OD
SOUND(0,0,0,0)
OD
; cheering
IF GAMEOVER=0 THEN
FOR I=0 TO 30 DO
FOR J=0 TO 1000 DO OD
SOUND(0,10,8,I RSH 1)
OD
FOR J=0 TO 40000 DO OD
FOR I=0 TO 30 DO
FOR J=0 TO 1000 DO OD
SOUND(0,10,8,15-I RSH 1)
OD
FI
SNDRST()
SOUND(3,0,0,3)
RETURN
PROC MOVEALL()
; Move paddles and puck
; keep attract mode at bay
ATRACT=0
; check for goal
IF PUCKX>2400 AND PUCKX<3700 THEN
IF PUCKY=0 THEN
GOAL(1)
ELSEIF PUCKY=BOT*100 THEN
GOAL(0)
FI
FI
IF GAMEOVER=0 THEN
MOVEPUCK()
MOVEPADDLE(0)
MOVEPADDLE(1)
FI
RETURN
PROC ENDGAME()
BYTE I
CARD J,K
; Cheer profusly and end game
SNDRST()
FOR I=0 TO 30 DO
FOR J=0 TO 1000 DO OD
SOUND(0,10,8,I RSH 1)
OD
FOR J=0 TO 200 DO
FOR K=0 TO 500 DO OD
IF RAND(130)=0 THEN
FOR I=0 TO 15 DO
FOR K=0 TO 1200 DO OD
SOUND(1,30-I,10,I)
OD
FOR I=0 TO 15 DO
FOR K=0 TO 1200 DO OD
SOUND(1,15+I,10,15-I)
OD
FI
OD
FOR I=0 TO 30 DO
FOR J=0 TO 1000 DO OD
SOUND(0,10,8,15-I RSH 1)
OD
FOR J=0 TO 40000 DO OD
RETURN
PROC PLAY()
; Play Air Hockey
INITPLAY()
SERVE(SERVER)
DO
DO
UNTIL VCOUNT=100
OD
IF CH<>$FF THEN
KEY=GETD(1)
FI
IF KEY=32 OR SERVEIT=1 THEN
SERVE(SERVER)
KEY=0
CH=$FF
SERVEIT=0
FI
MOVEALL()
UNTIL GAMEOVER=1 OR KEY=27 OR
CONSOL=6
OD
IF KEY<>27 AND CONSOL<>6 THEN
ENDGAME()
FI
SNDRST()
RETURN
; --- Main Procedure ---
PROC MAIN()
LMARGN=0
CLOSE(1)
OPEN(1,"K:",4,0)
DO
TITLE()
WHILE CONSOL=6 DO
OPTIONS()
PLAY()
OD
UNTIL KEY=27
OD
CLOSE(1)
GRAPHICS(0)
GRACTL=0
RETURN
