2 ; Oliver Schmidt, 24.03.2005
4 ; dhandle_t __fastcall__ dio_open (unsigned char device);
8 .import return0, __dos_type, isdevice
17 lda #$01 ; "Bad system call number"
18 bne oserr ; Branch always
20 ; Check for valid device
24 lda #$28 ; "No device connected"