Mark Wickens

Casio JIS Standard BASIC Reference Manual

A comprehensive reference for the Casio JIS Standard BASIC programming language as implemented across the Casio pocket computer family, including the FX-850P, FX-880P, FX-870P, VX-4, and related models.

This manual merges documentation from multiple sources into a single unified reference, noting where features are specific to particular models.

Table of Contents

1. Introduction to Casio JIS BASIC
2. Supported Computer Models
3. How to Enter BASIC Mode
4. Grammar Overview
5. BASIC Programming Guide
6. Command/Function Quick Reference Table
7. Error Messages
8. Character Code Table
9. Reserved Word List

Model Compatibility Badges

Throughout this manual, model compatibility is indicated with the following badges:

• [All Models] — Available on all Casio JIS BASIC computers
• [FX-850P/880P] — FX-850P and FX-880P only
• [FX-870P/VX-4] — FX-870P, VX-4, and later models
• [FX-890P/Z-1] — FX-890P, Z-1, and Z-1GR only
• [Undocumented] — Not in any official Casio manual

Command Reference (Alphabetical)

A

• ABS
• ACS
• AMP_H (&H)
• ANGLE
• ASC
• ASN
• ATN

B

• BEEP

C

• CALC$ [Undocumented]
• CALCJMP [Undocumented]
• CHAIN [FX-870P/VX-4]
• CHR$
• CLEAR
• CLOSE
• CLS
• CNT [FX-870P/VX-4]
• CONT
• COR [FX-870P/VX-4]
• COS
• CUR

D

• DATA
• DEFCHR$
• DEFM
• DEFSEG
• DEG
• DELETE
• DIM
• DMS$
• DSKF [FX-870P/VX-4]

E

• EDIT
• END
• EOF
• EOX, EOY [FX-870P/VX-4]
• ERASE
• ERL
• ERR
• EXP

F

• FACT
• FILES [FX-870P/VX-4]
• FIX
• FOR~NEXT~STEP
• FORMAT [FX-870P/VX-4]
• FRAC
• FRE

G

• GOSUB
• GOTO

H

• HEX$
• HYP SIN, HYP COS, HYP TAN
• HYP ASN, HYP ACS, HYP ATN

I

• IF~THEN~ELSE
• INKEY$
• INPUT
• INPUT@ [Undocumented]
• INPUT#
• INPUT$
• INT

K

• KILL [FX-870P/VX-4]

L

• LEFT$
• LEN
• LET
• LINE INPUT# [FX-870P/VX-4]
• LIST
• LIST#
• LLIST
• LLIST#
• LN
• LOAD
• LOAD#
• LOCATE
• LOG
• LOGICAL operators
• LPRINT
• LRA, LRB [FX-870P/VX-4]

M

• MEANX, MEANY [FX-870P/VX-4]
• MERGE [FX-870P/VX-4]
• MID$
• MOD
• MODE

N

• NAME [FX-870P/VX-4]
• NCR
• NEW
• NEW#
• NPR

O

• ON ERROR GOTO
• ON GOSUB
• ON GOTO
• OPEN

P

• PASS
• PBLOAD, PBGET [FX-850P/880P]
• PEEK
• PI
• POKE
• POL
• PRINT
• PRINT#
• PRINT USING [FX-870P/VX-4]

R

• RAN#
• READ
• READ#
• REC
• REM
• RENUM
• RESTORE
• RESTORE#
• RESUME
• RETURN
• RIGHT$
• ROUND
• RUN

S

• SAVE
• SAVE#
• SDX, SDY, SDXN, SDYN [FX-870P/VX-4]
• SET
• SGN
• SIN, COS, TAN
• SQR
• STAT [FX-870P/VX-4]
• STAT CLEAR [FX-870P/VX-4]
• STOP
• STR$
• SUMX, SUMY, SUMX2, SUMY2, SUMXY [FX-870P/VX-4]
• SYSTEM

T

• TAB
• TAN
• TROFF
• TRON

V

• VAL
• VALF
• VARLIST
• VERIFY [FX-850P/880P]

W

• WRITE#

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This manual is derived from the Casio FX-850P Owner’s Manual (Wickens), the Casio FX-870P/VX-4 Manual (Rost), and community-documented undocumented commands.