ldfps(3) [bsd man page]

LDFPS(3)						     Library Functions Manual							  LDFPS(3)

NAME

       ldfps - load floating point status register

SYNOPSIS

       void ldfps(fps)
       unsigned int fps;

DESCRIPTION

       Ldfps loads the hardware floating point status register with fps.  See the PDP-11 hardware handbook for a description of the meaning of the
       various bits in fps.

BUGS

       Ldfps is unique to the PDP-11 and 2BSD; its use is discouraged.

3rd Berkeley Distribution					  August 10, 1988							  LDFPS(3)

PHYS(2) 							System Calls Manual							   PHYS(2)

NAME

       phys - allow a process to access physical addresses (2BSD)

SYNOPSIS

       phys(segreg, size, physaddr)
       unsigned int segreg, size, physaddr;

DESCRIPTION

       The  argument  segreg specifies a process virtual (data-space) address range of 8K bytes starting at virtual address segregx8K bytes.  This
       address range is mapped into physical address physaddrx64 bytes.  Only the first sizex64 bytes of this mapping is addressable.  If size	is
       zero, any previous mapping of this virtual address range is nullified.  For example, the call

	    phys(7, 1, 0177775);

       will  map  virtual  addresses  0160000-0160077  into physical addresses 017777500-017777577.  In particular, virtual address 0160060 is the
       PDP-11 console located at physical address 017777560.

       This call may only be executed by the super-user.

ERRORS

       [EPERM]	      The process's effective user ID is not the super-user.

       [EINVAL]       Segreg is less than 0 or greater than 7.

       [EINVAL]       Size is less than 0 or greater than 128.

SEE ALSO

       PDP-11 segmentation hardware

BUGS

       On systems with ENABLE/34(tm) memory mapping boards, phys cannot be used to map in the I/O page.

       This system call is very dangerous.  It is not considered a permanent part of the system.

       Phys is unique to the PDP-11 and 2BSD; its use is discouraged.

3rd Berkeley Distribution					 January 22, 1987							   PHYS(2)