431 lines
8.4 KiB
PHP
431 lines
8.4 KiB
PHP
; =============================================================================
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; Source codes for Microsoft Basic-80 v5.21 for CP/M
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;
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; Initialized data. Variables, messages and tables.
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;
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; Disassembled by Romych and Ghidra @2026.08.27
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; =============================================================================
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; --------------------------------------------------
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; OPERATOR PRECEDENCE TABLE
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; --------------------------------------------------
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MB_OPTAB:
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DB 121 ; +
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DB 121 ; -
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DB 124 ; *
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DB 124 ; /
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DB 127 ; ^
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DB 80 ; OR
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DB 70 ; AND
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DB 60 ; XOR
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DB 50 ; EQV
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DB 40 ; IMP
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DB 122 ; MOD
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DB 123 ; IDIV
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; --------------------------------------------------
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; USED BY ASSIGNMENT CODE TO FORCE THE RIGHT HAND VALUE
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; TO CORRESPOND TO THE VALUE TYPE OF THE VARIABLE BEING
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; ASSIGNED TO.
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; --------------------------------------------------
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MB_FRCTBL:
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DW MB_FRCDBL
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DW 0x0
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DW MB_FRCINT
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DW MB_CHKSTR
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DW MB_FRCSNG
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; ---------------------------------------------------
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; DOUBLE PRECISION ROUTINES
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; ---------------------------------------------------
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MB_DBLDSP:
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DW MB_DADD
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DW MB_DSUB
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DW MB_DMULT
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DW MB_DDIV
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DW MB_DCOMP
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; ---------------------------------------------------
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; SINGLE PRECISION ROUTINES
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; ---------------------------------------------------
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MB_SNGDSP:
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DW MB_FADD
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DW MB_FSUB
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DW MB_FMUL
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DW MB_FDIV
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DW MB_FCOMP
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; ---------------------------------------------------
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; INTEGER ROUTINES
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; ---------------------------------------------------
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MB_INTDSP:
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DW MB_IADD
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DW MB_ISUB
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DW MB_IMUL
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DW MB_INTDIV
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DW MB_ICOMP
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; ---------------------------------------------------
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MB_ERRTAB:
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DB 0
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include "errors.inc"
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; ---------------------------------------------------
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MB_USRTAB:
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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DW MB_FCERR
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; ---------------------------------------------------
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MB_NULCNT:
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DB 1 ; NUMBER OF NULLS TO PRINT AFTER CRLF
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MB_CHARC:
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DB 0 ; EATEN CHAR WHEN NOT A ^C
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MB_ERRFLG:
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DB 0 ; ERROR NUMBER SO EDIT CAN BE CALLED ON "SYNTAX ERROR"
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MB_LPTLST:
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DB 0 ; LAST LINE PRINTER OPERATION. ZERO MEANS LINEFEED
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MB_LPTPOS:
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DB 0 ; POSITION OF LPT PRINT HEAD
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MB_PRTFLG:
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DB 0x00
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MB_NLPPOS:
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DB 112 ; (((LPTLEN/CLMWID)-1)*CLMWID) - LAST COMMA FIELD POSIT
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MB_LPTSIZ:
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DB 132 ; DEFAULT LINE PRINTER WIDTH
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MB_LINLEN:
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DB LINLN
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MB_CLMLST:
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DB 56 ; POSITION OF LAST COMMA COLUMN
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MB_RUBSW:
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DB 0 ; RUBOUT SWITCH=1 INSIDE THE PROCESSING OF A RUBOUT (INLIN)
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MB_CNTOFL:
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DB 0 ; SUPRESS OUTPUT FLAG, NON-ZERO MEANS SUPRESS
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MB_PTRFIL:
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DW 0 ; POINTER TO DATA BLOCK OF CURRENT FILE
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MB_TOPMEM:
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DW MB_TSTACK+100
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MB_CURLIN:
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DW 65534 ; CURRENT LINE #
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MB_TXTTAB:
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DW MB_TSTACK+1 ; MB_TSTACK+1
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MB_OVERRI:
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DW MB_OVRMSG ; = "Overflow"
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; ===================================================
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; END OF INITIALIZED PART OF RAM
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; ===================================================
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; ===================================================
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; DISK DATA STORAGE AREA
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; ===================================================
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MB_LSTFRE:
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DW 0 ; FREE PLACE IN DIRECTORY
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MB_MAXTRK:
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DB 0 ; ALLOCATE INSIDE THIS TRACK
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MB_DSKMOD:
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DB 0 ; MODE OF FILE JUST LOOKED UP, ZERO IF FILE WAS JUST CREATED
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MB_FILPT1:
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DW 0 ; [FILPTR] ALWAYS REFETCHED FROM HERE
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; POINTERS TO DATA BLOCKS FOR EACH FILE
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MB_FILPTR:
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.16 DW 0x0000
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; HIGHEST FILE NUMBER ALLOWED
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MB_MAXFIL:
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DB 0
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; THE NUMBER OF CHARACTER BEYOND #2 IN A VAR NAME
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MB_NAMCNT:
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DB 0
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MB_NAMBUF:
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.38 DB 0x00
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; TEMP STORAGE DURING NAME SAVE AT INDLOP
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MB_NAMTMP:
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DW 0
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MB_FILNA2:
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.16 DB 0x00
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MB_FILNAM:
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.33 DB 0x00
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MB_CPMVRN:
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DB 0 ; CP/M Version Number (#0 is 2.x)
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MB_CPMREA:
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DB 0 ; CP/M Read Call
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MB_CPMWRI:
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DB 0 ; CP/M Write Call
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MB_RST_INP: ; a colon for restarting input
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DB ':'
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MB_KBUF:
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.(KBFLEN) DB 0x00
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MB_BUFMIN:
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DB 44
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MB_BUF:
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.256 DB 0x00
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DB 0 ; ALLOW FOR SINGLE QUOTE IN BIG LINE
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DB 0
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MB_ENDBUF:
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DB 0
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MB_TTYPOS:
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DB 0
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MB_DIMFLG:
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DB 0
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;THE TYPE INDICATOR
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MB_VALTYP:
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DB 0
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;OPERATOR NUMBER
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MB_OPRTYP:
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DB 0
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MB_DORES:
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DB 0
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MB_CONTXT:
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DW 0
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MB_CONSAV:
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DB 0
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MB_CONTYP:
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DB 0
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; SAVED CONSTANT VALUE
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MB_CONLO:
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.4 DW 0
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; HIGHEST LOCATION IN MEMORY
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MB_MEMSIZ:
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DW 0
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; POINTER AT FIRST FREE TEMP DESCRIPTOR
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MB_TEMPPT:
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DW 0
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MB_TEMPST:
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.15 DB 0
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;MB_DSCTMP:
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.15 DB 0
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; STRING FUNCTIONS BUILD ANSWER DESCRIPTOR HERE
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MB_DSCTMP:
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.3 DB 0
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MB_DSCPTR EQU $ - 2
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MB_FRETOP:
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DW 0
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MB_TEMP3:
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DW 0
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MB_CPMFIL:
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DW 0
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MB_ENDFOR:
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DW 0
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MB_DATLIN:
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DW 0
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MB_SUBFLG:
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DB 0
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MB_FLGINP:
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DB 0
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MB_TEMP:
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DW 0
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MB_PTRFLG:
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DB 0
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MB_AUTFLG:
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DB 0
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MB_AUTLIN:
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DW 0
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MB_AUTINC:
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DW 0
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MB_SAVTXT:
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DW 0
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MB_SAVSTK:
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DW 0
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MB_ERRLIN:
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DW 0
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MB_DOT:
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DW 0
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MB_ERRTXT:
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DW 0
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MB_ONELIN:
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DW 0
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MB_ONEFLG:
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DB 0
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MB_TEMP2:
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DW 0
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MB_OLDLIN:
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DW 0
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MB_OLDTXT:
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DW 0
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; POINTER TO START OF SIMPLE VARIABLE SPACE
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MB_VARTAB:
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DW 0
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; POINTER TO BEGINNING OF ARRAY TABLE
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MB_ARYTAB:
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DW 0
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; END OF STORAGE IN USE
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MB_STREND:
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DW 0x00
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MB_DATPTR:
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DW 0x0
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MB_DEFTBL:
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.26 DB 0
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; PREVIOUS DEFINITION BLOCK ON STACK
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MB_PRMSTK:
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DW 0
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; NUMBER OF BYTES IN THE ACTIVE TABLE
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MB_PRMLEN:
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DW 0
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; ACTIVE PARAMETER DEFINITION TABLE
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MB_PARM1:
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.100 DB 0
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MB_PRMPRV:
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DW 0
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MB_PRMLN2:
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DW 0
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MB_PARM2:
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.100 DB 0
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MB_PRMFLG:
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DB 0x00
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MB_ARYTA2:
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DW 0x0
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; ZERO IF NO FUNCTIONS ACTIVE. SAVES TIME IN SIMPLE SEARCH
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MB_NOFUNS:
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DB 0
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; GARBAGE COLLECTION TEMP TO CHAIN THROUGH PARAMETER BLOCKS
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MB_TEMP9:
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DW 0
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; COUNT OF ACTIVE FUNCTIONS
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MB_FUNACT:
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DW 0
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MB_INPPAS:
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DB 0
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MB_NXTTXT:
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DW 0
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MB_NXTFLG:
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DB 0
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MB_FVALSV:
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DW 0
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DW 0
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MB_NXTLIN:
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DW 0
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MB_OPTVAL:
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DB 0
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MB_OPTFLG:
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DB 0
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MB_PATCH:
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.30 DB 0
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MB_TEMPA:
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DW 0
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MB_SAVFRE:
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DW 0
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MB_MAXREC:
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DW 0
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MB_PROFLG:
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DB 0
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MB_MRGFLG:
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DB 0
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MB_MDLFLG:
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DB 0
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MB_CMEPTR:
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DW 0
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MB_CMSPTR:
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DW 0
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MB_CHNFLG:
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DB 0
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MB_CHNLIN:
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DW 0
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MB_SWPTMP:
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DW 0, 0, 0, 0
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MB_TRCFLG:
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DB 0
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; ===================================================
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; THIS IS THE RAM TERMPORARY AREA FOR
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; MATH PACKAGE ROUTINES
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; ===================================================
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MB_FLOAT_ACC:
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DB 0 ; FLOATING ACCUMULATOR
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MB_DFACLO:
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DB 0, 0, 0, 0 ; FOUR LOWEST ORDERS FOR DOUBLE PRECISION
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MB_FACLO:
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DB 0, 0 ; MIDDLE ORDER OF MANTISSA
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DB 0 ; HIGH ORDER OF MANTISSA
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MB_FAC:
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DB 0, 0 ; EXPONENT
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MB_FLGOVC:
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DB 0 ; OVERFLOW PRINT FLAG, =0, 1 PRINT
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MB_OVCSTR:
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DB 0
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MB_FANSII:
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DB 0
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DB 0
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MB_ARGLO:
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.7 DB 0 ; LOCATION OF SECOND ARGUMENT FOR DOUBLE
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MB_ARG:
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DB 0 ; PRECISION
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MB_FBUFFR:
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.43 DB 0 ; BUFFER FOR FOUT
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; ===================================================
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; TEXT CONSTANTS FOR PRINT OUT
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; ===================================================
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MB_INTXT:
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DB " in ", 0
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MB_OKTXT:
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DB "Ok\r\n", 0
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MB_BRKTXT:
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DB "Break", 0
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