ZX81 Listing for digitalrain.p


ZX81 program listing for *DIGITAL RAIN*SLR/2018*

SYSTEM VARIABLES

PROG  : 16509
D-FILE: 21869
VARS  : 22662
E-LINE: 22663
STKBOT: 22663
STKEND: 22663


LEGEND

9999 means line number
PRINT means treat as KEYWORD P


PROGRAM LISTING

   0 REM MCII
30403 ?/INKEY$?INKEY$?CALL INKEY$
??INKEY$?  ??INKEY$PI?8PI?
INPUT PI?ERR MSGS CALL LN Vò84
IF INT £FAST STR$ ACS ?C!Y-LN õ
PILN (INKEY$)(BLN UNPLOT RNDK;)
CONT óLN UNPLOT RNDK=)HOME  LN
UNPLOT RNDK>2úLN UNPLOT RNDK)/=
LN òINKEY$)CONT óLN òINKEY$)
HOME  LN òINKEY$LN òINKEY$
LN òINKEY$SGN LPRINT TAN FAST B
GOSUB DELETE LPRINT TAN Y0B
GOSUB DELETE SóW/RAND ;?õPI?J
LINE ?J?7TAN RND)5 FAST GOSUB
UNDRAW /RNDù7FAST ;FOR 5CHR$ ò
GOSUB PISTOP AT FOR GOSUB K
LPRINT ñQòù6:RNDCLEAR QT5CLEAR Q
TAN LN VòñCOPY RETURN JFAST
GOSUB PILPRINT COS //LN VòG4IF
LN Vò?RETURN COPY CSAVE ñCOPY
RETURN JFAST GOSUB PILPRINT C
INPUT JERR MSGS 8COS 9EDIT LN X÷
ASN DRNDTAN ACS UNPLOT 6ORNDEO
RND?NEW ?PCOS LN CALL INKEY$C
NEXT TAN YF( AND GOTO PICHAR Yñ
ACS CKòYôACS DKòACS ÷PRINT LN
INT INKEY$÷ACS ?KòINPUT ?CHAR )2
£UKRND<IF VAL INKEY$LET J4LET
KRETURN !SòINPUT ?/QY*( AND
GOTO PI?NEW 3DEF PROC VAL VAL
VAL JACS (ACS (ACS (POP LINE DD
AT CHAR ùAT CHAR ùGOSUB UNDRAW
£RNDù76:RNDAT Y/(MURNDY5)MTRND
TAN STR$ FAST VAL RETURN
8218 RNDACS AUTO CõLN ( /QE:RND
LN DO PI/CRETURN RNDABS JPIRND
ACS AUTO CõLN ( /*E:RNDPRINT
LET E:RND?76:RND5TRNDPAT LPRINT
SGN TAN 7PRINT 6:RNDCLEAR QT5UU
RNDXMURNDRETURN òATN PUSH PILET
TAN U5RNDRETURN  CöXM5RND/AE£RND
ñSAVE òùQ?FAST LN CALL INKEY$C
CLS LPRINT RETURN CASN
RETURN ZC:RETURN D4÷ACS 0F?O4
CLS ?/INKEY$LN PUSH !/ABS ?LCOS
,LN õPI<"/PRINT RETURN CALL Sù
RETURN ""ACS R AND FPINEW Z5)ñ
CHAR ôRETURN 5K£RETURN ñCô
RETURN *SôJLN õPIACS õPI7/PRINT
NEW ZLN õPIJ?!PIINT º?MCIF LN O
CALL VAL UNDRAW PI)  STR$ FOR 7D
FOR D?+?0FOR KPLOT FOR FOR J?3
LINE ?3?OC/FOR JACS 0ACS 1?+?0
IF ùCALL ?+DEF PROC ?0CHAR STOP
;STOP /<>LPRINT AT ACS ?TAB (
INKEY$TAN ERR MSGS ?*>=(INKEY$
FOR ?CCHAR ACS ?TAB (INKEY$TAN
GOSUB OFFMRNDONICLEAR ?Rö GOSUB
DELETE /GOSUB DELETE /READ
END PROC GOSUB DELETE Kñ76MRND
ACS WERR MSGS EDIT TAN LN   E-
RND7PRINT LN -DPOKE LN -DPOKE
LN SCHAR LN INPUT DEF PROC INT ?
LN RAUTO LN <>AUTO TAN LN LEN
AUTO YCODE LN RUN DEF PROC LN *
EDIT /$LN RAUTO 5  LN >ERR MSGS
óLN NEXT AUTO FAST LN LEN AUTO
LPRINT LN >ERR MSGS LN A
ERR MSGS LN LLIST !)CLEAR CALL ñ
LN IF DEF PROC E?RNDLN INPUT
DEF PROC )RUN CALL ñô LN IF
DEF PROC E?RNDLN INPUT DEF PROC
LN .CHAR LN .CHAR YRUN LN RUN
DEF PROC Y?LN RUN DEF PROC LN
LET DEF PROC RETURN YTAB DRND5
LIST CALL FAST LN EúE?RNDDIM LN
POKE DEF PROC 4CLS INT ?
30455  
30386 DER II ENDAT YTAN ?BDPOKE 6
?RNDGOSUB OFF0RND<5?RNDLN OFF
DPOKE 5  6?RNDE?RND6?RNDLN A
DEF PROC WMõEND PROC 5?RNDFAST
LN 7DPOKE LPRINT FAST 7776-RNDU*
RNDM5RNDLN -DPOKE RETURN PAUSE
ATN NEXT ERR MSGS RETURN RAND
ATN CHR$ UNDRAW RETURN IF ATN ,
EDIT RETURN THEN CREM RETURN
DIM ATN JDEF PROC RETURN GOTO
ATN ?DPOKE RETURN GOSUB ATN >
DPOKE RETURN FOR ATN PAUSE
UNDRAW RETURN NEXT ATN 2PROTECT
RETURN SLOW ATN ""AUTO RETURN
POKE ATN VAL UNDRAW RETURN FAST
ATN LAUTO RETURN INPUT ATN ¶
PROTECT RETURN PLOT ATN DATA
EDIT RETURN UNPLOT ATN ³EDIT
RETURN LET ATN 2 RETURN CLS ATN
KUNDRAW RETURN STOP ASN £UNDRAW
RETURN PRINT ATN LET DPOKE
RETURN LPRINT ATN CHR$ DPOKE
RETURN NEW ATN òDPOKE RETURN
COPY ATN UNPLOT ERR MSGS RETURN
REM CPROTECT RETURN SCROLL ATN P
UNDRAW RETURN RETURN ATN $
ERR MSGS RETURN CLEAR ATN A
DEF PROC RETURN  4;E-RND-DPOKE
RETURN
8202 2DEF PROC TAB QERR MSGS LN
£UNDRAW LN LEN AUTO YSLN RUN
DEF PROC ?DRNDLN HTRACE 5=RND?S
UNDRAW 5PUSH !?SUNDRAW 5?ó?S
UNDRAW SCROLL RETURN ?4SGN LN
RUN DEF PROC 5/DPOKE LN SUNDRAW
/LEN ñRETURN RETURN GOSUB POP
ACS 1**?POKE DEF PROC UNTIL 7
RESTORE STR$ FOR FAST 67RNDRND
LN .CHAR LN INPUT DEF PROC JLN
RUN DEF PROC LPRINT LN BREAK
DPOKE ..FOR SGN LN OFFDPOKE
GOSUB OFF?RNDLN OFFDPOKE FAST
GOSUB OFF?RNDBGOSUB DELETE
LPRINT **6?RND?SCROLL CHAR ?7?7
TAN RESTORE 7UNTIL 7TAN FAST AT
E0RND7LN NOSTALGIC DPOKE FOR B
GOSUB PISQR E?RNDGOSUB DELETE **
FOR 7/GOSUB Y?PRINT LN -DPOKE
LN DO PROTECT LN BREAK DPOKE
FOR LN NOSTALGIC DPOKE FOR LET ?
UUNDRAW YLN /DIM FAST SCROLL
RETURN
10249 PRINT LN RUN DEF PROC
LET LPRINT TAN VAL FAST E?RND
PRINT ?FAST 76?RNDLN POKE
DEF PROC RETURN D4-Y
52727 LN INPUT DEF PROC JLN RUN
DEF PROC LET A ?LN INPUT
DEF PROC /òLPRINT LET LPRINT AT
JTAN 5CLEAR ACS LN XUNDRAW 5ñ
EXP LN XUNDRAW LN LET DPOKE 5
CLEAR ACS LN XUNDRAW 5ñ:?X
UNDRAW LN -DPOKE RETURN
8198 ERROR LN -DPOKE RETURN
INKEY$CZRETURN
51890 "CYRETURN AT C?RETURN CHR$
ASN >=ERROR RETURN TAB ASN GOTO
ERROR RETURN ,ASN OERROR PRINT E
-RND7LET ñTERROR VAL ñ  VAL ñM
TRACE VAL ?CHAR UNDRAW 5INPUT
DEF PROC LN SUNDRAW /RESEQ 5RND
TRACE LN SUNDRAW /óLN LOOP
ERROR 5IF DEF PROC LN SUNDRAW /
CHAR Y?LN BDPOKE E?RNDFAST LN X
UNDRAW ñCOPY COPY LN TRACE  ó
PRINT LN RUN DEF PROC LET
RETURN "CõLN BDPOKE /INPUT
LPRINT VAL GOSUB OFF?RNDLN OFF
DPOKE Y)LN UUNDRAW YñLPRINT ?U
UNDRAW LN IUNDRAW LN SQR UNDRAW
5CALL EDIT LN XUNDRAW 5PRINT !
LN SUNDRAW LN -DPOKE RETURN ,C>
RETURN ;ASN CLS DPOKE RETURN +
ASN CLS DPOKE 5.CHAR LN SUNDRAW
JTAN 5XERROR LN SUNDRAW ?CLS
DPOKE 5ñRNDACS AUTO TAB :"JLN
RUN DEF PROC UTRNDRETURN )S
UNDRAW :(Y/5URND-CHAR ?PRINT !
LN ERR MSGS UNDRAW Y?LN BDPOKE 5
RUN DEF PROC LN SUNDRAW /JLN H
TRACE 5RUN ERROR LN SUNDRAW /8?
NEW 3DEF PROC 5ñRNDACS AUTO C:5S
RND-ACS COPY LEN WUSR ?!?òùUTRND
CHR$ UNPLOT .CHAR /RY
50167 LN ABS 5IF DEF PROC LN S
UNDRAW ?.ERROR LN NOSTALGIC
DPOKE STR$ LN NOSTALGIC DPOKE
STR$ AT SGN TAN RETURN RNDABS
CONT ERR MSGS ñWRNDòLN LINE
CALL RETURN 0SúRETURN RNDLN -
DPOKE ó/INPUT RETURN (M÷
END PROC CôRETURN $4òóòúACS
COPY òLN ³CHAR A ?DDGOSUB
UNDRAW ?RNDùCHAR U÷END PROC
RETURN $C!RETURN (4òJTAN ?TAN
TAN RND9ñWRNDJMöEND PROC úY
ACS ?4KACS LIST ACS RNDFAST
END PROC OASN CONT ERR MSGS
LPRINT ?FFAST LN SCROLL CHAR
LPRINT óACS ?CNEXT J?6ùEND PROC
UöEND PROC LN DPEEK CHAR RETURN
ñ4"Y5LN UUNDRAW 5SAVE CHAR LN S
UNDRAW UöEND PROC 5õEND PROC
ERROR ôS**?TAN EùEND PROC )M 
GOSUB DELETE GOSUB OFF?RNDGOSUB
DELETE SQR INT ³FAST LN
NOSTALGIC DPOKE ?NLPRINT ""
GOSUB OFFñEND PROC LN OFFDPOKE )
  LN OFFDPOKE E?RNDGOSUB OFFñ
END PROC ;6ñEND PROC ñ  ?COS :
LN -DPOKE LN SCHAR RETURN ñASN
RESEQ RETURN  4úLN DPOKE ACOPY
FAST LN -DPOKE RETURN =TAB CONT
ERR MSGS LN HTRACE LPRINT ?
RETURN COPY 4£5SGN FOR LN X
UNDRAW 5OFFDPOKE ?SUNDRAW Y6?U
UNDRAW FAST 5NOSTALGIC TRACE LN
SUNDRAW LN -DPOKE LN LINE CALL
RETURN (46LPRINT LN ** 5STR$
VAL LN XUNDRAW 5DUP DEF PROC LN
SUNDRAW LN -DPOKE LN 3 5AT SGN
LN XUNDRAW 5?DEF PROC ?SUNDRAW
LN -DPOKE LN 3 LPRINT Y5LN U
UNDRAW 5?TRACE ?SUNDRAW I+FAST
LN -DPOKE RETURN (CRAND RETURN "
LN LOOP ERROR /END WHEN
RETURN INKEY$4!5RNDTRACE LN S
UNDRAW /USER RETURN CHR$ 4"LN
ERR MSGS UNDRAW 5UTRACE LN S
UNDRAW /DELETE LN ABS /EDIT LN
SCHAR LN -DPOKE FAST LN LINE
CALL RETURN (4NLN -DPOKE LN H
TRACE E-RNDDATA LOOP LN XUNDRAW
/"LN -DPOKE RETURN TO TAB CONT
ERR MSGS LN OUNDRAW 5AUTO TRACE
LN SUNDRAW LPRINT Y5LN UUNDRAW 5
WHILE TRACE ?SUNDRAW LPRINT Y5
LN UUNDRAW 5HCHAR ?SUNDRAW 5
LINE TRACE LN SUNDRAW LN LINE
CALL RETURN )CùLPRINT X""LN -
DPOKE ?5 LN -DPOKE /FOR ?ññ /ù
LN POKE DEF PROC ñ  GCOS £)ù
END PROC >TAN B.GOSUB DELETE
ERR MSGS EDIT LIST INT ºSTR$ LN
NOSTALGIC DPOKE FOR SGN ;FOR
TAN EñEND PROC 6õEND PROC TAN ?L
COS EõEND PROC FOR GOSUB KGOSUB
DO õEND PROC TAN FAST
END PROC GOSUB OFFñEND PROC B
GOSUB DELETE FAST AT LPRINT LN
NOSTALGIC DPOKE VAL FAST LN ?
DEF PROC LPRINT AT ?7?TAN FOR ö!
?RETURN  CñACS  DRAW ?FOR 5  
ACS T3Kñ;FOR DFOR (PRINT TAN J
PRINT LN ERR MSGS UNDRAW LN
LINE CALL RETURN + AND RNDDRAW
RETURN ;ABS RNDDRAW YFAST LN B
DPOKE LN -DPOKE PRINT LN
ERR MSGS UNDRAW LET RETURN +Cô
RETURN -47AT LINE ?RETURN  4ô
PRINT FAST /PEEK FAST 5ERR MSGS
EDIT LN XUNDRAW LN NEXT TRACE Y
FAST 5PUSH NOSTALGIC LN UUNDRAW
/ZPRINT VAL /0RETURN /C(RETURN *
TAB CONT ERR MSGS LN VDRAW 5)
TRACE LN SUNDRAW /BLN VDRAW 5
CLEAR DEF PROC /NEXT YLPRINT LN
BDPOKE LET RETURN  COS RETURN +C
)LN VDRAW 5BFOR LN XUNDRAW 5
GOSUB DELETE LN XUNDRAW /SCROLL
LN VDRAW Y;LN BDPOKE /<>YSGN ?B
DPOKE RETURN )4USR LN -DPOKE /
INT RETURN PEEK 4?LN ERR MSGS
UNDRAW 5A ?XUNDRAW RETURN USR 4>
LN ERR MSGS UNDRAW 5PUSH DRAW ?S
UNDRAW ñ?DRAW VAL FAST TAN
NOSTALGIC PUSH TAN RETURN CODE 4
G5õEND PROC YELN UUNDRAW YFAST
LN BDPOKE ICOPY LN 5 YSGN LN B
DPOKE 5>DRAW /USR EõEND PROC
GOSUB DO õEND PROC JGOSUB
DELETE LINE ?COS ,?TAN RETURN
RND4õ5ARND/VRETURN ABS 4)LN
ERR MSGS UNDRAW 5ACS ?LN X
UNDRAW YCODE 5?UNDRAW ?UUNDRAW
RETURN INT ASN ERR MSGS UNDRAW
RETURN LEN 4,LN -DPOKE LN SCHAR
LN -DPOKE Y5LN UUNDRAW 5>=DRAW /
º77LN NOSTALGIC DPOKE FOR TAN
RETURN SGN 4+LN ERR MSGS UNDRAW
5LIST DRAW ?SUNDRAW ?PCOS ACS ?5
ñ TAB ?UNDRAW TAN RETURN SQR
TAB CONT ERR MSGS LN ERR MSGS
UNDRAW 5úUNDRAW ?SUNDRAW JXACS ?
INT ¹?ELSE A )RND ö!GOSUB
DELETE Kñ;ZACS GOSUB
CLR STACK ·GOSUB CLR STACK (
LIST CLR STACK LINE TAN LN H
TRACE LN -DPOKE PRINT YFAST LN B
DPOKE LN HTRACE YSGN LN BDPOKE
LET TAN LN -DPOKE RETURN -PRINT
ATN -DPOKE RETURN (C-RETURN RNDK
$RETURN AUSR ?UNDRAW >=µUNDRAW
LET ATN ELSE UNDRAW TAN LN
TRACE DRAW /PLOT LN HTRACE /LET
5?UNDRAW /CHAR ?JLINE ?J?7TAN
LN SCHAR RETURN  ASN >DEF PROC Y
E/PLN DO PROTECT Y5/I)(BLN A
DPOKE LN $ERR MSGS UõEND PROC
DEF PROC £E?RND6?RNDöôLN BDPOKE
(CLS $4PLOT LPRINT GOSUB UNDRAW
?RNDTAN 5Eú/ó5"RNDYLN LN BDPOKE
?LN BDPOKE ??BDPOKE LN IUNDRAW
LN SQR UNDRAW 5FOR ?/GOSUB
RETURN ,TAB CONT ERR MSGS TAN
LN LINE CALL RETURN
10245 TRACE /!YE5ORNDLN UUNDRAW Y
65MRND?UUNDRAW LN -DPOKE LN S
CHAR FAST FAST LN -DPOKE LN I
UNDRAW Y7LN BDPOKE 5GOSUB DO LN
XUNDRAW LPRINT LN XUNDRAW Y677
LN UUNDRAW LPRINT GOSUB OFF?RND?
OFFDPOKE LN -DPOKE LN SCHAR
FAST FAST YELN UUNDRAW 576LN X
UNDRAW LPRINT LN XUNDRAW 77Y
GOSUB LN BDPOKE YOFFLN UUNDRAW Y
B5GOSUB DELETE LN UUNDRAW YIF
LPRINT LN NOSTALGIC DPOKE FOR ?U
UNDRAW 5  /?LN -DPOKE RETURN  
LN )TRACE LET RETURN AABS CONT
ERR MSGS RETURN 0 AND CONT
ERR MSGS CHR$ 0ö DEF PROC ù/ TO
FAST E-RND)õ ;6-RNDLPRINT TAN
LN -DPOKE LN SCHAR RETURN ñC1
PRINT FAST 5*EDIT LN SUNDRAW
LPRINT LET RETURN  TAB EXIT Y
FOR LN BDPOKE LN SUNDRAW Y5LN U
UNDRAW LN -DPOKE 5VPROTECT ?S
UNDRAW GOSUB UNDRAW ñEND PROC
VAL FAST LN òEDIT 6ñEND PROC
FAST LN PAUSE PROTECT RETURN
10249 KPRINT LN $EDIT /LIST SGN
GOSUB DELETE FAST AT LPRINT LN ³
TRACE AT GOSUB CALL ñEND PROC
FAST LN òEDIT ñ3 LN ?DEF PROC
LPRINT TAN FAST LN LET DEF PROC
LPRINT RETURN ?""J?FY
48672 £RNDñSAVE òùYL?TAN ?7Y
48672 /PAUSE LN òEDIT FAST FAST
LN PAUSE PROTECT RETURN
10257 C!RETURN 0SLET RETURN AK
GOSUB LN $EDIT /CONT 5  SGN ,
RETURN -C(RETURN LC?CHR$ 0DFAST
DDAT ùö DEF PROC ù</CONT SGN ,
RETURN -PRINT LN NEW PROTECT
LET ""??UNDRAW Y.PRINT LN I
UNDRAW LN SQR UNDRAW 5UNDRAW
DPOKE LN XUNDRAW YYLN BDPOKE
LET LN BDPOKE YM5KRNDLN UUNDRAW
5,RND?SUNDRAW Y4/**?PCOS ?NCOS R
TAN ?PCòRTAN ?NCOS RTAN E-RND7(C
PLOT RETURN INKEY$ASN ERR MSGS
AUTO RETURN CHR$ ASN ERR MSGS
AUTO RETURN "ASN ERR MSGS AUTO 7
LN IUNDRAW RETURN OR 4ú5?EDIT
LN SUNDRAW YABS /CHAR RETURN
AND 4õ5·EDIT /LIST PRINT YB5
GOSUB DELETE LN UUNDRAW LET
RETURN =4ôYTAB /GRETURN <>4ôY
ASN /8RETURN >C+RETURN <4÷YASN
LN 5AUTO /<RETURN >=4ú5CóLN X
UNDRAW YPAUSE RETURN <=TAB
CONT ERR MSGS YIF LN 5AUTO LN -
DPOKE RETURN AND ASN ,EDIT TAN
LN BDPOKE EúRND7LN BREAK DPOKE
FOR LN NOSTALGIC DPOKE FOR ?X
UNDRAW LN XAUTO 6õEND PROC 6÷
END PROC TAN EõEND PROC QCOPY 7
TAN 5NOSTALGIC TRACE LN SUNDRAW
LN 3 LN -DPOKE PRINT 5NAUTO LN S
UNDRAW LN 3 5XAUTO LN SUNDRAW 52
AUTO LN SUNDRAW LET RETURN =4ôY
TAB /ARETURN <>4ôYASN /2RETURN >
4÷YASN LN 5AUTO /!RETURN <C<
RETURN >=4ôY AND RETURN <=TAB
CONT ERR MSGS 5CóLN XUNDRAW Y
ABS ?+AUTO E÷END PROC GOSUB
UNDRAW ñEND PROC úWOY""RETURN  
COS 7ó/POKE 5RAUTO ?SUNDRAW LN
SCROLL ò5VRNDACS QTAN 5LEN AUTO
?SUNDRAW 5VRNDACS PLOT ?÷ò5ò LN
**ù""FAST LN 2DEF PROC SGN ?
DATA ú5ò LN **ù""LN 2DEF PROC
COS LN 2DEF PROC COS LOOP DATA E
£RND/SCROLL óóóVAL óóóóVAL LN
EXP AUTO 5ó LN **ùAT LN 2ù7Y
28963 7AT ?7?7QREM 7?7?7TAN 77
AUTO 7ERROR ù7U£RND1""U$RND0TAN
LN -DPOKE LN SCHAR Y5LN UUNDRAW
YGOSUB LN BDPOKE YOFF5ñEND PROC
LN UUNDRAW 5OFFDPOKE LN SUNDRAW
LN HTRACE 5UNTIL DEF PROC ?S
UNDRAW 7D7FAST FAST AT
END PROC LN COS :AT LN DUP
DEF PROC GOSUB DO ñEND PROC TAN
EñEND PROC DATA LOOP <Q /óEñ
END PROC ?LCOS GOSUB KTAN FAST
LN ERR MSGS UNDRAW 5GOSUB
UNDRAW LN XUNDRAW LPRINT LN X
UNDRAW 5Dù?XUNDRAW LN DPOKE 5
NOSTALGIC DPOKE LN SUNDRAW 5FOR
SGN ?XUNDRAW EôRND9QCOPY FQCOPY
FQ 6ùEND PROC Y5E?RNDLN UUNDRAW
I:UõEND PROC LINE LN XUNDRAW 5
ATN DEF PROC ?SUNDRAW £JM5RNDöô?
7(UNPLOT $4RUN 54 6?RNDE0RNDñ
HOME  ù6ñEND PROC 6õEND PROC
TAN RND?:RND?)RND?1RND?4RND
FOR ?7RND8RESEQ   ÷ö
23287 
   2 REM
30241 LN ATN DEF PROC 5?DELETE
GOSUB OFFñEND PROC LN OFFDPOKE 5
LN UNTIL DEF PROC LN ARNDFAST
5 ôSGN LN CLEAR DEF PROC FAST
 SGN ;6±DELETE E±DELETE GOSUB
UNDRAW ?DELETE DùSTR$ LN
NOSTALGIC DPOKE FOR SGN FAST 5  
SGN BGOSUB DELETE TAB ELSE
END PROC E±DELETE GOSUB UNDRAW ?
DELETE DùFAST 5ñ SGN FOR LN OFF
DPOKE 5ñ FAST 54 SGN 7GOSUB DO µ
DELETE 6·DELETE EµDELETE GOSUB
UNDRAW ?DELETE DùSTR$ LN
NOSTALGIC DPOKE FOR SGN FAST 5  
SGN BGOSUB DELETE ASN ;END PROC
LN **END PROC EµDELETE 76µ
DELETE GOSUB OFF·DELETE BGOSUB
DELETE IF ?END PROC LN
NOSTALGIC TRACE LN RNDTRACE LN
LINE TRACE LN NAUTO ?UEND PROC Q
)TEND PROC ññ LN LINE TRACE LN X
AUTO LN 2AUTO TAB STR$ END PROC
5>=£LN PUSH DRAW 6¹DELETE ?G
END PROC LN ARNDFAST 5(BSGN B
GOSUB DELETE ASN GOTO END PROC
IF GOTO END PROC LN CLEAR
DELETE GOSUB UNDRAW ?DELETE Dù
STR$ LN NOSTALGIC DPOKE FOR SGN
FAST 5  SGN BGOSUB DELETE ASN £
IF £?4LN ARNDFAST 5
 721 DEF PROC FAST 5" SGN ;6$
DELETE EµDELETE GOSUB UNDRAW ?
DELETE DùSTR$ LN NOSTALGIC
DPOKE FOR SGN FAST EµDELETE
FAST 5ñ SGN BFOR GOSUB DELETE
SGN CALL EDIT LN PRINT !E$
DELETE ?LN RUN DEF PROC LN .
CHAR EµDELETE GOSUB UNDRAW ?
DELETE DùFAST EµDELETE GOSUB
UNDRAW ?DELETE DùSTR$ LN
NOSTALGIC DPOKE FOR SGN FAST 5ñ 
SGN ;SGN FOR LN OFFDPOKE Eµ
DELETE GOSUB UNDRAW ?DELETE Dù
STR$ LN NOSTALGIC DPOKE FOR SGN
FAST 5= SGN BGOSUB DELETE PAUSE
3EµDELETE GOSUB UNDRAW ?DELETE D
ùFAST 5= LN ?UNDRAW SGN FOR LN
OFFDPOKE TAN 5+ FAST EµDELETE
GOSUB UNDRAW ?DELETE DùSTR$ LN
NOSTALGIC DPOKE FOR SGN SGN ;
FAST EµDELETE FAST 5ñ SGN BFOR
GOSUB DELETE SGN CALL EDIT LN
PRINT !?ATN  )ACS ññ LN IF
DEF PROC LN .CHAR EµDELETE
GOSUB UNDRAW ?DELETE DùFAST
DELETE GOSUB UNDRAW ?DELETE Dù
STR$ LN NOSTALGIC DPOKE FOR SGN
FAST 5ñ SGN ;SGN FOR LN OFF
DPOKE TAN LN ARNDFAST 5
 721 DEF PROC FAST 5" SGN ;6$
DELETE LN ARNDFAST 5DPEEK öSGN
LN CLEAR DEF PROC FAST 5ñ SGN ;6
¹DELETE E¹DELETE FAST EµDELETE
FAST 5ñ SGN BFOR GOSUB DELETE
SGN CALL EDIT LN PRINT !5:RND ñ
FAST 5?RND)TRACE SGN ;DELETE E)
DELETE FAST 5  SGN BGOSUB
DELETE PAUSE ?DELETE E$DELETE ?
LN RUN DEF PROC LN .CHAR TAN
TAN ÷                           
    9 óWHEN  REM       MCODER II
         COPYRIGHT 1983   D C TH
RELFALL COMPILER AT 17300 PROG A
T 20500
  10 REM *DIGITAL RAIN*SLR/2018*
  20 DIM S(32)
  30 LET X=RND/1024+1
  40 IF S(X)=0 THEN LET S(X)=1
  60 FOR Y=1 TO 32
  70 IF S(Y)<>0 THEN GOSUB 200
  80 NEXT Y
  90 IF INKEY$="Q" THEN LET L=
USR 3292
 100 GOTO 30
 200 IF RND<10000 THEN GOSUB 400
 210 IF S(Y)<0 THEN GOTO 300
 220 LET Z=RND/630+11
 230 PRINT AT S(Y),Y-1;CHR$ Z
 240 LET S(Y)=S(Y)+1
 250 IF S(Y)>20 THEN LET S(Y)=-2
0
 260 RETURN
 300 PRINT AT 21+S(Y),Y-1;" "
 310 LET S(Y)=S(Y)+1
 320 RETURN
 400 LET Z=RND/630+11
 410 LET L=RND/1638+1
 420 PRINT AT L,Y-1;
 430 LET P=PEEK (PEEK 16398+256*
PEEK 16399)
 440 IF P>0 THEN PRINT CHR$ Z
 450 RETURN
 490 STOP
 500 SAVE "DIGITALRAIN"
 510 LET L=USR 20500