pio_andb_rmw(D3X)

NAME
     pio_andb_rmw - byte I/O-bus read-modify-write cycle routines

SYNOPSIS
     pio_andb_rmw(piomap_t *piomap, iopaddr_t iopaddr, unsigned char mask);

DESCRIPTION
     pio_andb_rmw performs an atomic I/O-bus read-modify-write operation. This
     function reads a byte from the address given by the iopaddr argument. The
     function then ANDs the byte, with the mask specified by mask, and writes
     the result to the address, iopaddr. To prevent any other I/O-bus cycles
     during this operation, this function locks the I/O bus. piomap is the PIO
     map returned from pio_mapalloc(D3X).

   Note
     The address must be correctly aligned for the given transfer.

   See Also
     pio_orb_rmw(D3X), pio_andh_rmw(D3X), pio_andw_rmw(D3X)