Atari 400 Technical Reference Manual page 9

7
SYSTEM INITIALIZATION
116
Power-Up Initialization (Coldstart) Procedure 116
System Reset Initialization (Warmstart) Procedure 119
8 FLOATING POINT ARITHMETIC PACKAGE 121
9
8
Functions/Calling Sequences 122
ASCII to Floating Point Conversion (AFP) 122
Floating Point to ASCII Conversion (FASC) 122
Integer to Floating Point Conversion (IFP) 123
Floating Point to Integer Conversion (FPI) 123
Floating Point Addition (FADD) 124
Floating Point Subtraction (FSUB) 124
Floating Point Multiplication (FMUL) 124
Floating Point Division (FDIV) 125
Floating Point Logarithms (LOG and LOG10) 125
Floating Point Exponentiation (EXP and EXP10) 126
Floating Point Polynomial Evaluation (PLVEVL) 126
Clear FRO (ZFRO) 127
Clear Page-Zero Floating Point Number (ZF1) 127
Load Floating Point Number to FRO
(FLDOR and FLDOP) 127
Load Floating Point Number to FRl
(FLD1R and FLD1P) 128
Store Floating Point Number From FRO
(FSTOR and FSTOP) 128
Move Floating Point Number From FRO to FRl
(FMOVE) 128
Resource Utilization 128
Implementation Details 129
ADDING NEW DEVICE HANDLERS/PERIPHERALS
131
Device Table
134
CID/Handler Interface
134
Calling Mechanism
135
Handler Initialization
136
Functions Supported
136
Error Handling
140
Resource Allocation 140
ZERO-PAGE RAM
141
NONZERO-PAGE RAM 141
STACK SPACE
142
Handler/SID Interface
142