T
!00000573
<scoreboard>
<random>
<clock>
: t
  ['] tickbeat drop             \ Include this man
  titlescreen                   \ put up a title screen
  init_rand                     \ initialize the random number generator
  cls
  begin
    5 10 gotoxy ." Play level (0-9) or ESC? "
    0 begin
      drop key
      dup 27 = if
        drop cls
[ TURNKEYING -1 = ] IF{
        vbname 1 open if
          ." Writing out high scores " cr
          vboard  slotwidth 10 * stack abc|abca write drop drop
          close if else drop endif
        else
          ." error " . ." writing out high scores."
        endif
        exit
}ELSE{ [ TURNKEYING 1 = ] IF{
        snapshot
        bye
     }ELSE{
        exit
     }ENDIF
}ENDIF
      endif
      ` 0 - dup 10 u<
    until 10 swap - speed !      \ Figure speed
    0 score ! 0 rows !          \ New game
    title                       \ Show off
    0 score+                    \ Show score
    stats 7 4 * 0 fill          \ erase the statistics area
    0 svoffset gotoxy
    7 0 do i . ." :     0" cr loop \ put up the block numbers
    0 svoffset 7 + gotoxy ." # dropped:"
    play                        \ Play game
    cls
    0 score+                    \ Show score
    sethighscore                \ set new high score, if any
    5 10 gotoxy ." Press ESC..."
    begin key 27 = until
  0 until
;
-*-
v
TURNKEYING
!00000062
\       -1      turnkey
\        0      memory
\        1      snapshot
0 constant turnkeying
-*-
>
.R
!0000004B
: .r    ( n w -- )
  swap <# #s #> stack abc|bcac - 0 max spaces type
;
-*-
>
<TIME>
!00000020
\ Time package
package <time>
-*-
v
MONTH
!000000F1
\ Table of days per month
create month
  0 w,
 31 w,   \ Jan
 59 w,   \ Feb
 90 w,   \ Mar
120 w,   \ Apr
151 w,   \ May
181 w,   \ Jun
212 w,   \ Jul
243 w,   \ Aug
273 w,   \ Sep
304 w,   \ Oct
334 w,   \ Nov
365 w,   \ Dec
-*-
>
DAY
!0000001E
\ Day of month
variable day
-*-
>
MO
!00000016
\ Month
variable mo
-*-
>
YR
!00000021
\ Years since 1980
variable yr
-*-
>
GETIME
!000003DF
\ ( -> time ) Return the time in seconds since Jan 1, 1980
: getime
  0 0 0 h# 2A00 h# 21 int stack abcde|c \ Get the date
  dup h# FFFF and 1980 - yr !           \ Figure years
  16 shr dup h# FF and day ! 8 shr 1 - mo ! \ Figure day of month, month
  -1 day +!                             \ Zero base days
  mo @ 1 shl month + w@ day +!          \ Add days for months to total
  yr @ dup 365 * over 2/ 2/ + 1+ day +! \ Add days for years to total
  3 and 0= if                           \ Leap year?
    mo @ 2 <= if                        \ Before Feburary?
      -1 day +!                         \ Yes, fix overkill for leap year
    endif
  endif

  0 0 0 h# 2C00 h# 21 int stack abcde|c \ Get the time
  dup h# FF and 60 * mo !               \ Store minutes as seconds
  8 shr dup h# FF and 3600 * mo +!      \ Add hours as minutes
  16 shr mo +!                          \ Add seconds

  day @ 86400 * mo @ +                  \ Add seconds for days to total

;
-*-
>
DELAY
!00000090
\ ( time -> ) Delay given number of seconds
: delay
  getime +
  begin
    ?term if drop exit endif
    getime over >
  until
  drop
;
-*-
^
>
<SCOREBOARD>
!00000016
package <scoreboard>
-*-
v
ROWS
!00000029
\ Number of rows cleared
variable rows
-*-
>
SPEED
!0000001E
\ Game speed
variable speed
-*-
>
SCORE
!00000028
\ Your worthless score
variable score
-*-
>
VBNAME
!00000021
: vbname
  " vanity.brd" 1+
;
-*-
>
SLOTWIDTH
!00000017
17 constant SLOTWIDTH
-*-
>
VBOARD
!00000042
create vboard 10 SLOTWIDTH * allot
vboard 10 SLOTWIDTH * 0 fill
-*-
>
SVOFFSET
!00000016
15 constant svoffset
-*-
>
SHOWSCORE
!0000013B
: showscore     ( indx -- )
  indx !
  20 12 indx @ + gotoxy indx @ 1 +  2 .r 32 emit \ print out score #
  vboard indx @ SLOTWIDTH * + dup count type     \ print out name
  dup 12 + @   40 12 indx @ + gotoxy 4 .r        \ print out score
  16 + c@  47 12 indx @ + gotoxy 2 .r            \ print out level
;
-*-
v
INDX
!0000000F
variable indx
-*-
^
>
SHOWSCORES
!00000035
: showscores
  10 0 do
    i showscore
  loop
;
-*-
>
TITLESCREEN
!00000131
: titlescreen
  cls
[ TURNKEYING ] IF{
  vbname 2 open
  if
    vboard [ 10 SLOTWIDTH * ] literal stack abc|abca read drop drop
    close if else drop endif
  else
    drop vbname 0 createfile drop drop
  endif
}ENDIF
  30 10 gotoxy ." Tetris "
  showscores cr ." Press a key..." key drop
;
-*-
>
SETHIGHSCORE
!0000049D
: sethighscore
  score @ vboard
  10 0 do                               \ search for a slot
    i SLOTWIDTH * over + 12 + @
    stack abc|abca
    < if                                \ found one
      dup i SLOTWIDTH * + dup           \ source for move
      dup SLOTWIDTH +                   \ dest for move
      stack ab|baab                     \ kludge around fifth 2.6 bug
      10 i - 1- SLOTWIDTH *             \ length for move
      dup 0= if  stack abcde| else
        move                            \ make room in table for new score
        c@ swap c!                      \ rest of kludge
      endif
      dup 12 0 fill                     \ erase the name
      dup 12 + score @ swap !           \ stuff the score in
      dup 16 + speed @ 10 swap - swap c! \ stuff the level in
      showscores                        \ put up the scoreboard
      23 12 i + gotoxy                  \ move to the right place
      1+ 11 expect                      \ get name
      dup -1 = if drop 0 endif          \ handle esc's and fkeys
      swap 1- c!                        \ stuff in length
      leave
    endif
  loop drop drop
  showscores
;
-*-
>
SCORE+
!00000115
\ ( num -> ) Add to score, redisplay
<scoreboard>
: score+
  11 speed @ - * score +! \ Scale score by speed
  5 5 gotoxy
  ." Score: " score @      6 .r         \ Show score
  5 6 gotoxy
  ." Rows:  " rows  @      6 .r
  5 7 gotoxy
  ." Level: " 10 speed @ - 6 .r
;
-*-
^
>
<RANDOM>
!00000012
package <random>
-*-
v
STATS
!0000002E
create stats 7 4 * allot
stats 7 4 * 0 fill
-*-
>
_R_TABLESIZE
!0000001A
55 constant _R_TABLESIZE
-*-
>
_R_TABLE
!00000028
create _r_table _R_TABLESIZE 4 * allot
-*-
>
_R_IDX
!00000011
variable _r_idx
-*-
>
SEED
!0000000F
variable seed
-*-
>
IRAND
!0000004C
\ ( -> rand )
<scoreboard>
: irand
  seed @ 47421 * 917 + dup seed !
;
-*-
>
NRAND
!00000252
\ ( n -> rand ) Generate random number 0 -- n using
\               the additive congruential method
<scoreboard>
: nrand
  _r_table dup _r_idx @ 2 shl + @               \ get a[i]
  _r_idx @ 1+ _R_TABLESIZE mod stack abc|acbac
  2 shl + @                                     \ get a[(i+1)%tablesize]
  xor >r                                        \ xor the two nums
  swap _r_idx @ 2 shl + r@ 1+ swap !            \ update the seed_table
  _r_idx !                                      \ update the table ptr
  r> irand + 8 shr swap mod                     \ fixup the rand num
;
-*-
>
INIT_RAND
!000001B7
\ initialize the random number generator
<scoreboard> <time>
: init_rand     ( -- )
  getime seed !                         \ base our random # on our clock
  _R_TABLESIZE 0 do
    irand _r_table i 2 shl + !          \ stuff the seed table
  loop
  0 _r_idx !                            \ initialize the index
  stats [ 7 4 * ] literal 0 fill        \ initialize the statistics table
  1000 0 do
    31415 nrand drop
  loop
;
-*-
>
RAND
!000000DE
\ ( -> rand ) Generate random number 0-6
<scoreboard>
: rand
  7 nrand                                         \ get random num
  dup 2 shl stats +
  dup @ 1+  stack abc|acacb
  !   5 swap svoffset + gotoxy 4 .r
;
-*-
>
TEST_RAND
!00000044
: test_rand
  init_rand
  begin
    chisquare
  ?term until
;
-*-
v
CHISQUARE
!00000139
: chisquare     ( -- )
  stats [ 7 4 * ] literal 0 fill
  NUMREPS 0 do          \ collect random numbers
    7 nrand             \ get a random number
    2 shl stats + 1 swap +!     \ and update the table
  loop
  0
  7 0 do
    i 2 shl stats + @ dup * +
  loop
  7 * NUMREPS / NUMREPS - 7 - abs .
;
-*-
v
NUMREPS
!00000016
300 constant NUMREPS
-*-
^
^
^
>
<CLOCK>
!00000011
package <clock>
-*-
v
TICKER
!00000027
\ Current clock tick
variable ticker
-*-
>
TICKBEAT
!00000062
\ Interrupt to bump the ticker counter 18.2 times a second

28 :int tickbeat
  1 ticker +!
;
-*-
>
TICKER@
!00000024
: ticker@
  ticker int[ @ ]int
;
-*-
^
>
<SCREEN>
!00000012
package <screen>
-*-
v
XXX
!0000006C
: xxx
  cls
  256 0 do
    i screen i 10 * + c!
    i 5 * 1+ 80 /mod gotoxy i .
  loop
  key drop
;
-*-
>
PS
!0000005C
( x y char -> ) \ Put char on screen
: ps
  >r 160 * swap 1 shl + screen + r> swap c!
;
-*-
>
GS
!00000053
( x y -> char ) \ Get char from screen
: gs
  160 * swap 1 shl + screen + c@
;
-*-
>
WIDX
!00000028
\ Width of play area
20 constant widx
-*-
>
COL
!00000024
\ Starting column
40 constant col
-*-
>
BCOLOR
!00000028
\ Background color
32 constant bcolor
-*-
^
>
TITLE
!00000195
\ Useless title
<screen>
: title
  cls
  24 0 do
    col 1-        i 186 ps
    col 2-        i 186 ps
    col widx +    i 186 ps
    col widx + 1+ i 186 ps
  loop
  24 0 do
    col widx + col do
      i j bcolor ps
    2 +loop
  loop
  col 2-        24 200 ps
  col 1-        24 202 ps
  col widx +    24 202 ps
  col widx + 1+ 24 188 ps
  widx 0 do
    col i + 24 205 ps
  loop
;
-*-
>
PLAY
!0000013E
\ Play game till dead
: play
  0 #dropped !                  \ so far, we haven't dropped any
  0 next ! launch               \ Set new next piece
  launch draw-me                \ Somebody new
  begin dokey if exit endif     \ Handle keys until ESC or dead
  fall until                    \ Fall until dead
;
-*-
v
PIECES
!00000495
\ A list of the pieces, 4 rotations of 7 varieties
create pieces

o o o o   o x o o   o o o o   o x o o
x x x x   o x o o   x x x x   o x o o
o o o o   o x o o   o o o o   o x o o
o o o o   o x o o   o o o o   o x o o

o x o o   o o o o   o x o o   o x o o
o x x o   x x x o   x x o o   x x x o
o x o o   o x o o   o x o o   o o o o
o o o o   o o o o   o o o o   o o o o

o x o o   o o o o   o o o o   o o o o
o x o o   o x x x   o x x o   o o x o
o x x o   o x o o   o o x o   x x x o
o o o o   o o o o   o o x o   o o o o

o o x o   o o o o   o o o o   o o o o
o o x o   o x o o   o x x o   x x x o
o x x o   o x x x   o x o o   o o x o
o o o o   o o o o   o x o o   o o o o

o x o o   o o o o   o o o o   o o o o
o x x o   o o x x   o x o o   o x x o
o o x o   o x x o   o x x o   x x o o
o o o o   o o o o   o o x o   o o o o

o o x o   o o o o   o o o o   o o o o
o x x o   o x x o   o o x o   x x o o
o x o o   o o x x   o x x o   o x x o
o o o o   o o o o   o x o o   o o o o

o o o o   o o o o   o o o o   o o o o
o x x o   o x x o   o x x o   o x x o
o x x o   o x x o   o x x o   o x x o
o o o o   o o o o   o o o o   o o o o
-*-
v
O
!0000000C
: o 0 c, ;
-*-
>
X
!0000000C
: x 1 c, ;
-*-
^
>
CUR-PIECE
!0000004E
\ The current piece - as an offset into the pieces array
variable cur-piece
-*-
>
X
!00000025
\ Upper-left X of piece
variable x
-*-
>
Y
!00000025
\ Upper-left Y of piece
variable y
-*-
>
PIECE-NUM
!00000024
\ Piece number
variable piece-num
-*-
>
DRAW-ME
!000000EF
\ ( -> ) Draw a piece at X,Y
<screen>
: draw-me
  4 0 do
    4 0 do
      cur-piece @ i + j 4 shl + c@ if
        i i + x @ + j y @ + over 1+ over piece-num @ color-tab + c@
        >r r@ ps r> ps
      endif
    loop
  loop
;
-*-
v
COLOR-TAB
!00000044
create color-tab
176 c, 177 c, 178 c, 219 c, 176 c, 177 c, 178 c,
-*-
^
>
ERASE-ME
!000000CD
\ ( -> ) Draw a piece at X,Y
<screen>
: erase-me
  4 0 do
    4 0 do
      cur-piece @ i + j 4 shl + c@ if
        i i + x @ + j y @ + over 1+ over 32 ps bcolor ps
      endif
    loop
  loop
;
-*-
>
TEST-ME
!000000F0
\ ( -> test-me) Test for ok
<screen>
: test-me
  4 0 do
    4 0 do
      cur-piece @ i + j 4 shl + c@ if
        i i + x @ + j y @ + gs bcolor = not if 1 exit endif
      endif
    loop
  loop
  0                     \ All OK
;
-*-
>
NEXT
!00000021
\ The next piece
variable next
-*-
>
#DROPPED
!0000003F
\ # of blocks dropped so far
variable #dropped
0 #dropped !
-*-
>
LAUNCH
!0000025D
\ ( -> ) Launch a new piece
<scoreboard>
<random>
<screen>
: launch
  next @ dup setpiece           \ Set old next piece & save
  70 x ! 18 y ! erase-me        \ Erase old next piece

  rand dup next ! setpiece      \ Figure new next piece
  draw-me                       \ Draw new next piece

  setpiece                      \ Set old next as current again
  col widx 2/ + 2- x !          \ Middle of screen
  0 y !                         \ At top
  1 #dropped +!                 \ we have dropped one more piece
  12 svoffset 7 + gotoxy #dropped @ 4 .r        \ print out total cnt
;
-*-
v
SETPIECE
!00000063
\ ( n -> ) Set a piece as current
: setpiece
  dup piece-num !
  6 shl pieces + cur-piece !
;
-*-
^
>
FALL
!000002E9
\ ( -> dead ) Dead flag
: fall
  erase-me                      \ Nuke old
  1 y +!                        \ Drop down one
  test-me if                    \ Check for clear
    -1 y +!                     \ Not clear, fix Y
    draw-me                     \ Show in old position
    y @ dup 4 + 24 min swap do  \ For all rows just touched
      i chop-row                \ See if can remove row
    loop                        \
    launch                      \ And launch a new piece
    test-me                     \ New piece fit? (1 if no)
  else                          \
    0                           \ Otherwise always work
  endif                         \ Clear
  draw-me                       \ Draw new position
;
-*-
v
CHOP-ROW
!00000280
\ ( y -> ) Check given row to see if can remove
<scoreboard>
<screen>
: chop-row
  y !                            \ Save row
  col widx + col do              \ Loop thru row
    i y @ gs bcolor = if exit endif \ All clear?
  loop

  0 y @ 1- do                   \ Loop thru, dropping all rows
    i 160 * [ col dup + ] literal + screen + dup 160 +
    [ widx dup + ] literal move  \ Copy it down
  -1 +loop

  1 rows +!                     \ Another row
  1 score+ 7 emit               \ Tell 'em good
  rows @ 10 mod 0= if           \ Every ten rows
    speed @ 1- 1 max speed !    \ Speed up till max speed
  endif
;
-*-
v
Y
!0000000C
variable y
-*-
^
^
>
DOKEY
!00000362
\ ( -> ESC-flag) Handle keys until time-out or null
<scoreboard>
<clock>
: dokey
  ticker@ speed @ + time !   \ Get starting value+speed
  begin                                 \ Loop for time
    ?term if key                        \ Handle keys
      dup 32  = if drop'em endif        \ Space bar - drop 'em
      dup ` 7 = if left endif           \ Left
      dup ` 8 = if rotate endif         \ Rotate
      dup ` 9 = if right endif          \ Right
      dup ` 6 = if speedup endif        \ speed up
      dup ` 4 = if drop'em endif        \ drop block
      dup ` p = over ` p 32 + = or if pause endif       \ hold game
      27 = if 1 exit endif              \ ESC ends game
    endif                               \ Loop for keys
  ticker@ time @ >= until    \ Loop until reach time
  0                                     \ Return null
;
-*-
v
TIME
!0000001C
\ Drop-time
variable time
-*-
>
DROP'EM
!00000227
\ ( -> ) Drop 'em in place
<scoreboard>
<clock>
: drop'em
  erase-me                      \ Clear it
  y @                           \ remember old pos
  begin                         \ Loop
    1 y +!                      \ Drop one
  test-me until                 \ Loop until won't go
  -1 y +!                       \ Back up one
  draw-me                       \ And show me
  y @ stack ab|baba - 0 max 1 shr score+        \ get points
  - 2 > if dokey drop endif
  ticker int[ @ ]int time !     \ Out of time; next piece please
;
-*-
>
LEFT
!000000DD
\ ( -> ) Move block left
: left
  erase-me      \ Clear old
  -2 x +!       \ Go left
  test-me if    \ Check for walls
    2 x +!      \ Oops, back up
  endif         \
  draw-me       \ And draw new position
;
-*-
>
RIGHT
!000000E0
\ ( -> ) Move block right
: right
  erase-me      \ Clear old
  2 x +!        \ Go right
  test-me if    \ Check for walls
    -2 x +!     \ Oops, back up
  endif         \
  draw-me       \ And draw new position
;
-*-
>
ROTATE
!00000101
\ ( -> ) Rotate block
: rotate
  erase-me      \ Clear old
  cur-piece @ 12 + h# FFFFFFCC and cur-piece !
  test-me if    \ Check for walls
    cur-piece @ 4 + h# FFFFFFCC and cur-piece !
  endif         \
  draw-me       \ And draw new position
;
-*-
>
SPEEDUP
!00000054
<scoreboard>
: speedup
  speed @ 1- 0 max speed !              \ adjust speed
;
-*-
>
PAUSE
!000001E9
<scoreboard>
<clock>
: pause
  0 0 gotoxy ." 100:"
  ticker@ firsttick !        \ get our starting time
  begin
    firsttick @ if
      ticker@ firsttick @ - [ 100 18 * ] literal > if
        4 0 gotoxy ." ok "
        0 firsttick !
      endif
    endif
    ?term if
      key dup ` p = swap ` p 32 + = or
    else
      0
    endif
  until
  ticker@ firsttick @ -  dup 100 18 * < if
    10 * negate score+
  else
    drop
  endif
  0 0 gotoxy ."            "
;
-*-
v
FIRSTTICK
!00000014
variable firsttick
-*-
^
^
^
>
TETRIS
!0000002A
: tetris
  ['] bye i->d error !
  t
;
-*-
v
BYEBYE
!00000014
: byebye
  bye
;
-*-
^
^