bios16
if ((error = bios16(&args, PNP_COUNT_DEVNODES, &ndevs, &bigdev)) || (args.r.eax & 0xff)) {
if ((error = bios16(&args, PNP_GET_DEVNODE, &pda->next, &pda->node, 1))) {
int bios16(struct bios_args *, char *, ...);