ACCUM
ahd_inw(ahd, REG0), ahd_inb(ahd, ACCUM));
ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX),
u_int rejbyte = ahc_inb(ahc, ACCUM);
ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM));
ahc_inb(ahc, ACCUM));