toscallW
#define Bconstat(dev) toscallW(BIOS_TRAP, 1, (uint16)dev)
#define Bconin(dev) toscallW(BIOS_TRAP, 2, (uint16)dev)
#define Getbpb(dev) (struct tos_bpb *)toscallW(BIOS_TRAP, 7, (uint16)dev)
#define Bcostat(dev) toscallW(BIOS_TRAP, 8, (uint16)dev)
#define Mediach(dev) toscallW(BIOS_TRAP, 9, (int16)dev)
#define Kbshift(mode) toscallW(BIOS_TRAP, 11, (uint16)mode)
#define Jdisint(intno) toscallW(XBIOS_TRAP, 26, (int16)intno)
#define Jenabint(intno) toscallW(XBIOS_TRAP, 27, (int16)intno)
#define VsetMode(mode) toscallW(XBIOS_TRAP, 88, (int16)mode)
#define VgetSize(mode) toscallW(XBIOS_TRAP, 91, (int16)mode)
#define Pterm(retcode) toscallW(GEMDOS_TRAP, 76, (int16)retcode)
#define Metaclose(drive) toscallW(XBIOS_TRAP, 50, (int16)drive)
#define Metagettoc(drive, flag, p) toscallW(XBIOS_TRAP, 62, (int16)drive, (int16)flag, (void *)p)