Atari 400 Technical Reference Manual page 25

FLOATING POINT ARITHMETIC PACKAGE
The
as
ROM contains a Floating Point (FP) package that is available
to nonresident programs such as ATARI BASIC.
The package is not used bV the other parts
o~
the
as
itsel~.
The
~loating
point numbers are stored as 10 BCD digits
o~
mantissa, plus a
1-bvte exponent. The package contains these routines:
o ASClI-to-FP and FP-to-ASCII conversion.
o Integer-to-FP and FP-to-integer conversion.
o FP add, subtract, multiply and divide.
o FP log, exp, and polynomial evaluation.
o FP number clear, load, store, and move.
OPERATING SYSTEM C016555 -- Section 2
24