When the OS/2 operating system is first loaded from the installation diskettes, the following adapter device drivers and device managers are loaded:
旼컴컴컴컴컴컴컴컴컴컫컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿌dapter Device 쿞upported Device Managers � 쿏river � � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿚S2DASD.DMD 쿚S/2 DASD manager � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿚S2CDROM.DMD 쿚S/2 CD-ROM manager � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BM1FLPY.ADD 쿔SA removable media driver � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BM1S506.ADD 쿔SA ST-506 driver � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BM2FLPY.ADD 쿌BIOS removable media driver � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BM2ADSK.ADD 쿌BIOS DASD driver � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BM2SCSI.ADD 쿌BIOS SCB driver � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴� 쿔BMINT13.I13 쿒eneric INT 13h driver � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
Additional drivers supporting other OEM interfaces also can be present.
When each device driver initializes, it attempts to determine whether its target hardware adapter is present. If the hardware interface is recognized, the driver completes its initialization and, subsequently, is ready to manage I/O operations during OS/2 system installation. If the hardware interface is not recognized, the device driver will fail the initialization with the Quiet Fail flags set. Quiet failure prevents the generation of failure messages on the workstation display.
Hardware interfaces that are not recognized by any of the drivers on the OS/2 initialization diskette are driven by the generic INT 13h adapter device (IBMINT13.I13) during installation. The IBMINT13 driver determines whether the previously loaded adapter device drivers have claimed at least as many fixed disks as indicated by the BIOS fixed disk count (0:475). The IBMINT13 driver will attempt to manage the remaining fixed disks. Consequently, to install and initially load the OS/2 operating system from an OEM adapter, it is important for the OEM to ensure that the IBMINT13 adapter device driver works properly with the OEM's adapter BIOS.
The OS/2 operating system can be installed and loaded on drives with BIOS IDs hex 80 or higher, provided that the OEM BIOS supplies INT 13h support for these drives.