TI BASIC

Keywords

ABS

ASC

ATN

BREAK

BYE

CALL

CHR$

CLEAR

COLOR

CONTINUE

COS

DATA

DEF

DELETE

DIM

DISPLAY

EDIT

END

EOF

EXP

FOR

GCHAR

GO SUB

GO TO

GOSUB

GOTO

HCHAR

IF

INPUT

INT

JOYST

KEY

LEN

LET

LIST

LOG

NEW

NEXT

NUMBER

OLD

ON-GOSUB

ON-GOTO

OPEN

OPTION

POS

PRINT

RANDOMIZE

READ

REM

RESEQUENCE

RESTORE

RETURN

RND

RUN

SAVE

SCREEN

SEG$

SGN

SIN

SOUND

SQR

STEP

STOP

STR$

TAN

TO

TRACE

UNBREAK

UNTRACE

VAL

VCHAR

The BASIC developed by Texas Instruments for their pioneer 16-bit home computers 99/4 (1979) and 99/4A (1981). The user manual of this last machine was the guide for its implemented keywords listed here. The machines were plagued by hardware decisions, but TI BASIC was a very complete implementation of the language with some exclusive and interesting features.

Where it is/was used

Texas Instruments TI-99/4 and TI 99/4A

Noteworthy characteristics

Environment and usage

Extensions

TI Extended Basic was a cartridge released by TI in 1981 with a lot of features highly missed.

Curiosities

Twice the word size, half the performance: the TI 99/4 machines were remarkably slow and their BASIC suffered the most. The Sieve of Erastothenes benchmark by BYTE Magazine took 3960 seconds, while the Apple II could do it in 2806 seconds.¹⁾

Related to...

Influenced by

The Minimal ANSI BASIC Specification released in 1978 was noticeably followed close by TI BASIC.

Influence for

Versions and successors

References

https://en.wikipedia.org/wiki/TI_BASIC_(TI_99/4A), last check 2023-02-11
https://archive.org/details/ti-99-4-a-users-reference-guide, last check 2023-03-03

Interpreters, ROM, TI/99

¹⁾

BYTE Magazine, January 1983. Available at https://archive.org/details/byte-magazine-1983-01/page/n291/mode/2up , last checked 2021-02-11

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