prom_rmw(2spp) — mips UMIPS RISC/os 5.01



PROMRMW(2spp)      RISC/os Reference Manual       PROMRMW(2spp)



NAME
     prom_rmw - perform VME bus read-modify-write cycles

SYNOPSIS
     #include <prom/entrypt.h>
     #define RVEC 0xbfc00000

     orbrmw(address, bits)
     orhrmw(address, bits)
     orwrmw(address, bits)
     andbrmw(address, bits)
     andhrmw(address, bits)
     andwrmw(address, bits)
     unsigned char *address
     unsigned mask

DESCRIPTION
     These routines perform VME bus read-modify-write cycles.
     The routines bitwise ands or bitwise ors of the contents of
     the location address and bits.  The 'b', 'h', and 'w' indi-
     cate if address is referenced as a byte, halfword, or word,
     respectively.

RETURNS
     These routines return the original contents of the location
     address.





























                         Printed 1/6/92                    Page 1
Museum
