mirror of
https://github.com/bobbimanners/EightBall.git
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Tetris for Apple ][ lo-res mode is now complete
This commit is contained in:
Bobbi Webber-Manners
GitHub
parent
5dc202ec2a
commit
76ef797854
326
tetris.8b
326
tetris.8b
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@ -3,64 +3,112 @@
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word addrs[24]={$400,$480,$500,$580,$600,$680,$700,$780,$428,$4a8,$528,$5a8,$628,$6a8,$728,$7a8,$450,$4d0,$550,$5d0,$650,$6d0,$750,$7d0}
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' Size of playfield
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const lhs=14
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const rhs=lhs+11
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const top=10
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const bttm=top+22
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const strow=8
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const stcol=18
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' Apple II specific addresses
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const spkr=$c030
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const kbdata=$c000
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const kbstrb=$c010
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const hpos=36
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const rnd=$4e
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byte col=18
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byte row=5
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' ASCII
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const beep=7
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const clrscr=12
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' Position of piece
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byte col=stcol
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byte row=strow
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byte rot=0
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byte key=0
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byte ocol=18
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byte orow=5
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' Previous col, row, rotation
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byte ocol=stcol
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byte orow=strow
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byte orot=0
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byte key=0
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byte piece=0
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byte done=0
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word score=0
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byte canl=1
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byte canr=1
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' Seed the PRNG
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word rr=$4e
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call lores()
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call clrlo()
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call frame()
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' Left, right, rotate permitted?
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byte lok=1
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byte rok=1
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byte rotok=1
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' First run
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byte first=1
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call prng()
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piece=rr%5
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call loresmix()
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while 1
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key=getkey()
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orow=row;ocol=col;orot=rot
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if key=='s'
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if rot==3
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rot=0
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pr.ch clrscr
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call clrlomix()
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call frame()
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call printnewlines()
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if first
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call printintro()
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kbd.ch &key
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call clearintro()
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first=0
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endif
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call printtext()
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call printscore()
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call playgame()
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kbd.ch &key
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endwhile
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end
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sub playgame()
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score=0
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while 1
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key=getkey()
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orow=row;ocol=col;orot=rot
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if key=='s'&&rotok
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if rot==3
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rot=0
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else
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rot=rot+1
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endif
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else
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rot=rot+1
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endif
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else
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if (key=='a')&&canl
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col=col-1
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else
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if (key=='d')&&canr
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col=col+1
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if (key=='a')&&lok
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col=col-1
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else
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if (key=='d')&&rok
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col=col+1
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endif
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endif
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endif
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endif
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key=^spkr
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row=row+1
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canl=1
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canr=1
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call drawPiece(ocol,orow,orot,1); 'Erase
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if drawPiece(col,row,rot,0)
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call checkframe(row)
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col=18;row=5;rot=0
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piece=piece+1
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if piece==4
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piece=0
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key=^spkr
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row=row+1
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lok=1
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rok=1
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rotok=1
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call drawPiece(ocol,orow,orot,1); 'Erase
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if drawPiece(col,row,rot,0)
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if row==strow+1
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call loser()
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return 0
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else
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call checkframe(row)
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col=stcol;row=strow;rot=0
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call prng()
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piece=rr%5
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endif
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endif
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endif
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endwhile
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call text()
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end
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endwhile
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endsub
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sub getkey()
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if ^kbdata<128
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@ -99,6 +147,21 @@ sub clrlo()
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endfor
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endsub
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sub clrlomix()
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byte r=0
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byte c=0
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for r=0:19
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for c=0:39
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^(addrs[r]+c)=0
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endfor
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endfor
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for r=20:23
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for c=0:39
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^(addrs[r]+c)=' '+128
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endfor
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endfor
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endsub
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sub plot(byte c,byte r,byte color)
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word a=addrs[r/2]+c
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if r%2
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@ -141,12 +204,14 @@ sub drawPiece(byte c,byte r,byte rot,byte erase)
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if piece==0
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return drawT(c,r,rot,erase)
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else; if piece==1
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return drawZ(c,r,rot,erase)
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return drawL(c,r,rot,erase)
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else; if piece==2
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return drawZ(c,r,rot,erase)
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else; if piece==3
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return drawSq(c,r,rot,erase)
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else
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return drawI(c,r,rot,erase)
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endif;endif;endif
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endif;endif;endif;endif
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endsub
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sub drawT(byte c,byte r,byte rot,byte erase)
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@ -159,8 +224,12 @@ sub drawT(byte c,byte r,byte rot,byte erase)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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call plot(c+1,r+2,color)
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canl=!(readpix(c-1,r+1)||readpix(c,r+2))
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canr=!(readpix(c+3,r+1)||readpix(c+2,r+2))
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if erase
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return 0
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endif
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lok=!(readpix(c-1,r+2)||readpix(c,r+2)||readpix(c,r+3))
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rok=!(readpix(c+2,r+2)||readpix(c+3,r+2)||readpix(c+2,r+3))
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rotok=!(readpix(c,r+2)||readpix(c+1,r+3))
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return readpix(c,r+2)||readpix(c+1,r+3)||readpix(c+2,r+2)
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else
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if rot==1
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@ -168,8 +237,12 @@ sub drawT(byte c,byte r,byte rot,byte erase)
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call plot(c,r+1,color)
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call plot(c+1,r+1,color)
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call plot(c+1,r+2,color)
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canl=!(readpix(c,r)||readpix(c-1,r+1)||readpix(c,r+2))
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canr=!(readpix(c+2,r)||readpix(c+2,r+1)||readpix(c+2,r+2))
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if erase
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return 0
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endif
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lok=!(readpix(c-1,r+2)||readpix(c,r+2)||readpix(c,r+3))
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rok=!(readpix(c+2,r+1)||readpix(c+2,r+2)||readpix(c+2,r+3))
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rotok=!(readpix(c,r+2)||readpix(c+2,r+2))
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return readpix(c,r+2)||readpix(c+1,r+3)
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else
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if rot==2
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@ -177,8 +250,12 @@ sub drawT(byte c,byte r,byte rot,byte erase)
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call plot(c,r+1,color)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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canl=!(readpix(c,r)||readpix(c-1,r+1))
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canr=!(readpix(c+2,r)||readpix(c+3,r+1))
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if erase
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return 0
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endif
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lok=!(readpix(c-1,r+2)||readpix(c,r+2)||readpix(c+1,r+2))
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rok=!(readpix(c+1,r+2)||readpix(c+2,r+2)||readpix(c+3,r+2))
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rotok=!(readpix(c+1,r+2)||readpix(c+2,r+2)||readpix(c+1,r+3))
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return readpix(c,r+2)||readpix(c+1,r+2)||readpix(c+2,r+2)
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else
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if rot==3
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@ -186,8 +263,12 @@ sub drawT(byte c,byte r,byte rot,byte erase)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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call plot(c+1,r+2,color)
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canl=!(readpix(c,r)||readpix(c,r+1)||readpix(c,r+2))
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canr=!(readpix(c+2,r)||readpix(c+3,r+1)||readpix(c+2,r+2))
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if erase
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return 0
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endif
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lok=!(readpix(c,r+1)||readpix(c,r+2)||readpix(c,r+3))
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rok=!(readpix(c+2,r+2)||readpix(c+3,r+2)||readpix(c+2,r+3))
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rotok=!(readpix(c,r+2)||readpix(c+2,r+2)||readpix(c+1,r+3))
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return readpix(c+1,r+3)||readpix(c+2,r+2)
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endif
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endif
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@ -195,6 +276,68 @@ sub drawT(byte c,byte r,byte rot,byte erase)
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endif
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endsub
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sub drawL(byte c,byte r,byte rot,byte erase)
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byte color=8
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if erase
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color=0
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endif
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if rot==0
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call plot(c+1,r,color)
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call plot(c+1,r+1,color)
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call plot(c+1,r+2,color)
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call plot(c+2,r+2,color)
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if erase
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return 0
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endif
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lok=!(readpix(c,r+1)||readpix(c,r+2)||readpix(c,r+3)||readpix(c+1,r+3))
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rok=!(readpix(c+2,r+1)||readpix(c+2,r+3)||readpix(c+3,r+3))
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rotok=!(readpix(c,r+2)||readpix(c+2,r+1))
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return readpix(c+1,r+3)||readpix(c+2,r+3)
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else
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if rot==1
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call plot(c+2,r,color)
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call plot(c,r+1,color)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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if erase
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return 0
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endif
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lok=!(readpix(c-1,r+2)||readpix(c,r+2)||readpix(c+1,r+2))
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rok=!(readpix(c+1,r+2)||readpix(c+2,r+2)||readpix(c+3,r+2)||readpix(c+3,r+1))
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rotok=!(readpix(c+2,r+2)||readpix(c+2,r+3))
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return readpix(c,r+2)||readpix(c+1,r+2)||readpix(c+2,r+2)
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else
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if rot==2
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call plot(c+1,r,color)
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call plot(c+2,r,color)
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call plot(c+2,r+1,color)
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call plot(c+2,r+2,color)
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if erase
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return 0
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endif
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lok=!(readpix(c,r+1)||readpix(c+1,r+1)||readpix(c+1,r+2)||readpix(c+1,r+3))
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rok=!(readpix(c+3,r+1)||readpix(c+3,r+2)||readpix(c+3,r+3))
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rotok=!(readpix(c+1,r+1)||readpix(c+1,r+2)||readpix(c+3,r+1))
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return readpix(c+1,r+1)||readpix(c+2,r+3)
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else
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if rot==3
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call plot(c+1,r,color)
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call plot(c+2,r,color)
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call plot(c+3,r,color)
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call plot(c+1,r+1,color)
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if erase
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return 0
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endif
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lok=!(readpix(c,r+1)||readpix(c,r+2))
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rok=!(readpix(c+2,r+1)||readpix(c+3,r+1)||readpix(c+4,r+1)||readpix(c+2,r+2))
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rotok=!(readpix(c+2,r+1)||readpix(c+2,r+2)||readpix(c+2,r+3)||readpix(c+3,r+3))
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return readpix(c+1,r+2)||readpix(c+2,r+1)||readpix(c+3,r+1)
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endif
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endif
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endif
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endif
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endsub
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sub drawZ(byte c,byte r,byte rot,byte erase)
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byte color=2
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if erase
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@ -205,18 +348,26 @@ sub drawZ(byte c,byte r,byte rot,byte erase)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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call plot(c+2,r+2,color)
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canl=!(readpix(c,r)||readpix(c,r+1)||readpix(c,r+2))
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canr=!(readpix(c+2,r)||readpix(c+3,r+1)||readpix(c+3,r+2))
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return readpix(c+2,r+3)
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if erase
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return 0
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endif
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lok=!(readpix(c,r+1)||readpix(c,r+2)||readpix(c+1,r+2)||readpix(c+1,r+3))
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rok=!(readpix(c+3,r+2)||readpix(c+3,r+3))
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rotok=!(readpix(c,r+3)||readpix(c+1,r+3)||readpix(c+1,r+2))
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return readpix(c+1,r+2)||readpix(c+2,r+3)
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else
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if (rot==1)||(rot==3)
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call plot(c+1,r+1,color)
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call plot(c+2,r+1,color)
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call plot(c,r+2,color)
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call plot(c+1,r+2,color)
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canl=!(readpix(c,r+1)||readpix(c-1,r+2))
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canr=!(readpix(c+3,r+1)||readpix(c+2,r+2))
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return readpix(c,r+3)||readpix(c+1,r+3)
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if erase
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return 0
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endif
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lok=!(readpix(c-1,r+3)||readpix(c,r+3)||readpix(c+2,r+2))
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rok=!(readpix(c+1,r+3)||readpix(c+2,r+3)||readpix(c+2,r+2)||readpix(c+3,r+2))
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rotok=!(readpix(c+2,r+2)||readpix(c+2,r+3))
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return readpix(c,r+3)||readpix(c+1,r+3)
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endif
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endif
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endsub
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@ -231,8 +382,12 @@ sub drawI(byte c,byte r,byte rot,byte erase)
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call plot(c+1,r+2,color)
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call plot(c+2,r+2,color)
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call plot(c+3,r+2,color)
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canl=!readpix(c-1,r+2)
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canr=!readpix(c+4,r+2)
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if erase
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return 0
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endif
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lok=!readpix(c-1,r+3)
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rok=!readpix(c+4,r+3)
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rotok=!(readpix(c+2,r+3)||readpix(c+2,r+4))
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return readpix(c,r+3)||readpix(c+1,r+3)||readpix(c+2,r+3)||readpix(c+3,r+3)
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else
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if (rot==1)||(rot==3)
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@ -240,8 +395,12 @@ sub drawI(byte c,byte r,byte rot,byte erase)
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call plot(c+2,r+1,color)
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call plot(c+2,r+2,color)
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call plot(c+2,r+3,color)
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canl=!(readpix(c+1,r)||readpix(c+1,r+1)||readpix(c+1,r+2)||readpix(c+1,r+3))
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canr=!(readpix(c+3,r)||readpix(c+3,r+1)||readpix(c+3,r+2)||readpix(c+3,r+3))
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if erase
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return 0
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endif
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lok=!(readpix(c+1,r+1)||readpix(c+1,r+2)||readpix(c+1,r+3)||readpix(c+1,r+4))
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rok=!(readpix(c+3,r+1)||readpix(c+3,r+2)||readpix(c+3,r+3)||readpix(c+3,r+4))
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rotok=!(readpix(c,r+3)||readpix(c+1,r+3)||readpix(c+3,r+3))
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return readpix(c+2,r+4)
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endif
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endif
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@ -256,8 +415,12 @@ sub drawSq(byte c,byte r,byte rot,byte erase)
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call plot(c+2,r+1,color)
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call plot(c+1,r+2,color)
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call plot(c+2,r+2,color)
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canl=!(readpix(c,r+1)||readpix(c,r+2))
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canr=!(readpix(c+3,r+1)||readpix(c+3,r+2))
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if erase
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return 0
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endif
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lok=!(readpix(c,r+2)||readpix(c,r+3))
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rok=!(readpix(c+3,r+2)||readpix(c+3,r+3))
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rotok=1
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return readpix(c+1,r+3)||readpix(c+2,r+3)
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endsub
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@ -268,7 +431,7 @@ sub checkframe(byte r)
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endif
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while rr>=r
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if checkline(rr)
|
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pr.ch 7; 'Beep
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pr.ch beep
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else
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rr=rr-1
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endif
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@ -283,6 +446,8 @@ sub checkline(byte r)
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|||
endif
|
||||
endfor
|
||||
call deleterow(r)
|
||||
score=score+1
|
||||
call printscore()
|
||||
return 1
|
||||
endsub
|
||||
|
||||
|
|
@ -304,3 +469,40 @@ sub deleterow(byte r)
|
|||
endwhile
|
||||
endsub
|
||||
|
||||
sub printnewlines()
|
||||
byte i=0
|
||||
for i=0:19
|
||||
pr.nl
|
||||
endfor
|
||||
endsub
|
||||
|
||||
sub printintro()
|
||||
^hpos=10
|
||||
pr.msg "TETRIS - PRESS ANY KEY"
|
||||
endsub
|
||||
|
||||
sub clearintro()
|
||||
^hpos=10
|
||||
pr.msg " "
|
||||
endsub
|
||||
|
||||
sub printtext()
|
||||
^hpos=10
|
||||
pr.msg "SCORE: "
|
||||
endsub
|
||||
|
||||
sub printscore()
|
||||
^hpos=17
|
||||
pr.dec score
|
||||
endsub
|
||||
|
||||
sub loser()
|
||||
^hpos=10
|
||||
pr.msg "GAME OVER - SCORE WAS "
|
||||
pr.dec score
|
||||
endsub
|
||||
|
||||
sub prng()
|
||||
rr=rr*8191+7; ' Mersenne prime
|
||||
endsub
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user