80-Bus News

  

July-August 1983, Volume 2, Issue 4











Page 28 of 55











Dis-assembly of NASCOM ROM BASIC Ver 4.7                PAGE    10

                ; RESERVED WORD TOKEN VALUES

0080            ZEND    EQU     080H            ; END
0081            ZFOR    EQU     081H            ; FOR
0083            ZDATA   EQU     083H            ; DATA
0088            ZGOTO   EQU     088H            ; GOTO
008C            ZGOSUB  EQU     08CH            ; GOSUB
008E            ZREM    EQU     08EH            ; REM
009E            ZPRINT  EQU     09EH            ; PRINT
00A4            ZNEW    EQU     0A4H            ; NEW

00A5            ZTAB    EQU     0A5H            ; TAB
00A6            ZTO     EQU     0A6H            ; TO
00A7            ZFN     EQU     0A7H            ; FN
00A8            ZSPC    EQU     0A8H            ; SPC
00A9            ZTHEN   EQU     0A9H            ; THEN
00AA            ZNOT    EQU     0AAH            ; NOT
00AB            ZSTEP   EQU     0ABH            ; STEP

00AC            ZPLUS   EQU     0ACH            ; +
00AD            ZMINUS  EQU     0ADH            ; -
00AE            ZTIMES  EQU     0AEH            ; *
00AF            ZDIV    EQU     0AFH            ; /
00B2            ZOR     EQU     0B2H            ; OR
00B3            ZGTR    EQU     0B3H            ; >
00B4            ZEQUAL  EQU     0B4H            ; =
00B5            ZLTH    EQU     0B5H            ; <
00B6            ZSGN    EQU     0B6H            ; SGN
00C7            ZPOINT  EQU     0C7H            ; POINT
00CD            ZLEFT   EQU     0CDH            ; LEFT$

Dis-assembly of NASCOM ROM BASIC Ver 4.7                PAGE    11

                ; ARITHMETIC PRECEDENCE TABLE

E2A4 79         PRITAB: DEFB    79H             ; Precedence value
E2A5 94F9               DEFW    PADD            ; FPREG = <last> + FPREG

E2A7 79                 DEFB    79H             ; Precedence value
E2A8 C8F5               DEFW    PSUB            ; FPREG = <last> - FPREG

E2AA 7C                 DEFB    7CH             ; Precedence value
E2AB 06F7               DEFW    MULT            ; PPREG = <last> * FPREG

E2AD 7C                 DEFB    7CH             ; Precedence value
E2AE 67F7               DEFW    DIV             ; FPREG = <last> / FPREG

E2B0 7F                 DEFB    7FH             ; Precedence value
E2B1 B5FA               DEFW    POWER           ; FPREG = <last> ^ FPREG

E2B3 50                 DEFB    50H             ; Precedence value
E2B4 81EE               DEFW    PAND            ; FPREG = <last> AND FPREG

E2B6 46                 DEFB    46H             ; Precedence value
E2B7 80EE               DEFW    POR             ; FPREG = <last> OR FPREG

                ; BASIC ERROR CODE LIST

E2B9 4E46       ERRORS: DEFB    "NF"            ; NEXT without FOR
E2BB 534E               DEFB    "SN"            ; Syntax error
E2BD 5247               DEFB    "RG"            ; RETURN without GOSUB
E2BF 4F44               DEFB    "OD"            ; Out of DATA
E2C1 4643               DEFB    "FC"            ; Illegal function call
E2C3 4F56               DEFB    "OV"            ; Overflow error
E2C5 4F4D               DEFB    "OM"            ; Out of memory
E2C7 554C               DEFB    "UL"            ; Undefined line
E2C9 4253               DEFB    "BS"            ; Bad subscript
E2CB 4444               DEFB    "DD"            ; Re-DIMensioned array
E2CD 2F30               DEFB    "/0"            ; Division by zero
E2CF 4944               DEFB    "ID"            ; Illegal direct
E2D1 544D               DEFB    "TM"            ; Type mis-match
E2D3 4F53               DEFB    "OS"            ; Out of string space
E2D5 4C53               DEFB    "LS"            ; String too long
E2D7 5354               DEFB    "ST"            ; String formula too complex
E2D9 434E               DEFB    "CN"            ; Can't CONTinue
E2DB 5546               DEFB    "UF"            ; Undefined FN function
E2DD 4D4F               DEFB    "MO"            ; Missing operand


This is an OCR’d version of the scanned page and likely contains recognition errors.











Page 28 of 55