AMIGA(7A)         MISC. REFERENCE MANUAL PAGES          AMIGA(7A)



NAME
     /dev/amiga - Amiga hardware access device

SYNOPSIS
     #include <sys/types.h>
     #include <sys/amiga.h>
     int fd;
     fd = open("/dev/amiga", mode);

DESCRIPTION
     /dev/amiga is a special file  which  allows  access  to  the
     Amiga   custom   chips  and  their  associated  "chip  ram".
     /dev/amiga is similar to /dev/mem (see mem(7))  except  that
     only  the  address  ranges  0x000000-0x1fffff  and 0xa00000-
     0xdfffff can be accessed.  The /dev/amiga device can also be
     used to map the Amiga hardware into the address space of the
     user process via the mmap(2) sytsem call.   Any  portion  of
     either  area  may  be mapped, with the restriction that only
     chip ram which is actually installed on the machine  may  be
     mapped.

FILES
     /dev/amiga - special file for accessing Amiga hardware

SEE ALSO
     open(2),  close(2),  read(2),  write(2),  mmap(2),   mem(7),
     console(7A), screen(7A).

WARNING
     Although this interface provides some protection, it is pos-
     sible  to  crash  the machine or completely mangle all video
     output, among other potential disasters.  The permissions of
     /dev/amiga  reflect  this; only priveleged, trusted programs
     will use this interface.





















Amiga Unix          Last change: PRELIMINARY                    1