55296



such as the device time-out problem. Unfortunately, there is a cloud
with this silver lining: not all of your old software will run with the new
ROMs. Megalegs, one of my favorite games, cannot run under the new
ROMs. A pity that. There are others; I'm sure you'll find them. The
solution is to have both sets of ROMs so you can use all of your
software.

FLOATING POINT PACKAGE ROM

Locations 55296 to 57343 ($D800 to $DFFF) are reserved for the ROM's
Floating Point Mathematics Package. There are other areas used by the
FP package: page zero (locations 212 to 254; $D4 to $FE) and page five
(locations 1406 to 1535; $57E to $5FF), which are used only if FP
routines are called. There are also trigonometric functions in the BASIC
cartridge located between 48549 and 49145 ($BDA5 to $BFF9) which
use the FP routines. See De Re Atari for more information.

These are the entry points to some of the subroutines; unless otherwise
noted, they use FP register zero (FR0 at 212 to 217, $D4 to $DB):

55296          D800           AFP
     ASCII to Floating Point (FP) conversion.

55526          D8E6           FASC
     FP value to ASCII conversion.

55722          D9AA           IFP
     Integer to FP conversion.

55762          D9D2           FPI
     FP to integer conversion.

55876          DA44           ZFR0
     Clear FR0 at 212 to 217 ($D4-$DB) by setting all bytes to zero.

55878          DA46           ZF1
     Clear the FP number from FR1, locations 224 to 229 ($E0 to $E5),
     by setting all bytes to zero. Also called AF1 by De Re Atari.

55904          DA60           FSUB
     FP subtract routine, the value in FR0 minus the value in FR1.

55910          DA66           FADD
     FP addition routine; FR0 plus FR1.

56027          DADB           FMUL
     FP multiplication routine; FR0 times FR1.

56104          DB28           FDIV
     FP division routine; FR0 divided by FR1.

56640          DD40           PLYEVL
     FP polynomial evaluation.