Floating-Point Numbers; All Other Tags Not Listed Here; List; Table 14.4: Data Object For A Floating-Point Number - Texas Instruments TI-89 Developer's Manual

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14.1.3.

Floating-Point Numbers

Description
Data length of FP number
Exponent/sign
BCD mantissa value (MSD at lowest address)
FLOAT_TAG
Bit 7 of the most significant (lower address) Exponent/Sign byte is the mantissa sign. The
remaining 15 bits represent the exponent and exponent sign (0x4000 = exponent of 0,
0x3FFF = exponent of -1, 0x4001 = exponent of +1).
14.1.4.

All Other Tags Not Listed Here

In general, an expression is any statement that starts with a tag not listed below.
That is anything that is not a list, matrix, function, program, picture, string, text,
graph database, assembly language program, or a third party data type (FILE).
The preceding three types (integers, fractions, and floating-point numbers) are
only special cases of expressions.
14.2.

List

A list is a collection of expressions. A list may only contain expressions and
nothing else.
Description
Data length of list
END_TAG
Expressions (1 per element of list)
LIST_TAG

Table 14.5: Data Object for a List

TI-89 / TI-92 Plus Developer Guide

Table 14.4: Data Object for a Floating-Point Number

Not for Distribution
Chapter 14: Data Types
Bytes
2
2
7 (MSD->LSD)
1
Bytes
2
1
variable
1
Beta Version January 26, 2001