Topic       : The ATARI Compendium
Author      : Scott Sanders / JAY Software
Version     : 1.25 (20/6/2003)
Subject     : Documentation
Nodes       : 1117
Index Size  : 32614
HCP-Version : 6
Compiled on : Atari
@charset    : UTF-8
@lang       : en
@default    : 
@help       : %About
@options    : +g -i -t4 +y +z
@width      : 100
View Ref-File
                    Math Co-processor in Peripheral Mode


Location(s)   SizeBYTE   Occupies one byte (8 bits).
WORD   Occupies one WORD (16 bits).
LONG   Occupies one longword (32 bits).
OW     Occupies the odd WORD of a LONG.
EW     Occupies the even WORD of a LONG.
OB     Occupies the odd BYTE of a WORD.
EB     Occupies the even BYTE of the WORD.
  MchnIf the box is shaded then address is available
for this computer.

        ▒ ▒ ▒ ▒ ▒ ▒
        | | | | | '------- Falcon030
        | | | | '--------- TT030
        | | | '----------- MEGA STe
        | | '------------- STe
        | '--------------- MEGA ST
        '----------------- ST
  TypeROM          Location is Read-Only Memory
RAM          Location is Read-Write Memory
I/O          Location is hardware-mapped
VME          Location addresses VME address space
N/A          Not applicable
RO           Read-only location
WO           Write-only location
RW           Read-write location
RSVD         Reserved
Unassigned   Either not assigned or undocumented
  Meaning                         (see Usage)

                    ▒ ▒
0x00FFFA40    WORD  ▒ ▒   I/O   FPCIR Status Register (available as a Mega
                    ▒ ▒         Bus card accessed in 68881 peripheral
                    ▒ ▒         mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA42    WORD  ▒ ▒   I/O   FPCTL Control Register (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA44    WORD  ▒ ▒   I/O   FPSAV Save Register (available as a Mega
                    ▒ ▒         Bus card accessed in 68881 peripheral
                    ▒ ▒         mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA46    WORD  ▒ ▒   I/O   FPREST Restore Register (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA48    WORD  ▒ ▒   I/O   FPOPR Operation Word Register (available
                    ▒ ▒         as a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA4A    WORD  ▒ ▒   I/O   FPCMD Command Register (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA4C    WORD  ▒ ▒   I/O   FPRES Reserved (available as a Mega Bus
                    ▒ ▒         card accessed in 68881 peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA4E    WORD  ▒ ▒   I/O   FPCCR Condition Code Register (available
                    ▒ ▒         as a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA50    LONG  ▒ ▒   I/O   FPOP Operand Register (available as a Mega
                    ▒ ▒         Bus card accessed in 68881 peripheral
                    ▒ ▒         mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA54    WORD  ▒ ▒   I/O   FPSLCT Register Select (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA56    WORD  ▒ ▒   I/O   Reserved
                    ▒ ▒
                    ▒ ▒
0x00FFFA58    LONG  ▒ ▒   I/O   FPIADR Instruction Address (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                    ▒ ▒
0x00FFFA5C    LONG  ▒ ▒   I/O   FPOADR Operand Address (available as
                    ▒ ▒         a Mega Bus card accessed in 68881
                    ▒ ▒         peripheral mode)
                    ▒ ▒
                   ▒▒▒▒▒▒
0x00FFFA60 -  N/A  ▒▒▒▒▒▒ I/O   Unassigned
0x00FFFA7F         ▒▒▒▒▒▒
                   ▒▒▒▒▒▒