HelenOS sources

DP_RSAR1          125 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_RSAR1, (addr >> 8) & 0xff);
DP_RSAR1          150 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_RSAR1, (addr >> 8) & 0xff);
DP_RSAR1          226 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_RSAR1, 0);
DP_RSAR1          244 uspace/drv/nic/ne2k/dp8390.c 	pio_write_8(ne2k->port + DP_RSAR1, 0);
DP_RSAR1          514 uspace/drv/nic/ne2k/dp8390.c 		pio_write_8(ne2k->port + DP_RSAR1, (offset >> 8) & 0xff);
HelenOS homepage, sources at GitHub