Western Digital is a registered trademark of Western Digital Corporation; IBM PC, AT and XT are registered trademarks of the International Business Machines Corporation; MS DOS, OS2 and PC DOS and Xenix are registered trademarks of Microsoft Corporation. WD1007A-WAH User Guide The WD1007A-WAH controller is designed to interface with up to two ESDI compatible hard disk drives in an IBM PC AT or compatible system. The ESDI drives used with this controller generally have two modes of operation, soft sector and hard sector. At this time, the WD1007A-WAH offers only the hard sector mode of operation. There are two versions of the WD1007A-WAH available. Feature 1 (F001) has the WD1007A BIOS which will allow low level formatting of ESDI type drives using DOS. The Feature 0 (F000) does not have the BIOS and will work with AT type systems which have ESDI parameters in the system BIOS or for use with the Novell operating system. NOTE DO NOT USE THE WD1007A-WAH WITH MFM TYPE HARD DISK DRIVES USE ONLY WITH ESDI HARD DISK DRIVES Installation of the controller requires three steps: 1) verifying jumper settings; 2) installing into the host computer; 3) formatting the hard disk drives. To complete installation, you will need the following: Two hard disk cables (3 if using 2 hard disk drives); ESDI hard disk drive; screwdriver; MSDOS Version 3.3 or later; WD1007A BIOS or WDFMT 2.10 formatting utility; FDISK (normally included with MSDOS). Preparation of Controller WARNING HANDLE THE CONTROLLER BY THE ENDS OF THE BOARD SOME OF THE CHIPS ARE STATIC SENSITIVE AND DAMAGE MAY OCCUR IF THE BOARD IS INCORRECTLY HANDLED Before you can install your WD1007A-WAH, you will need to be certain that the jumpers (small shorting plugs) are correctly set. Refer to Table 1 for correct jumper settings. Modification of factory jumper settings is rarely necessary. Modify jumpers only under the direction of a qualified individual; i.e. your dealer. 旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 � �J4컴컴컴컴컴컴커 �J3컴컴컴컴� �J2횯rive 0 �J1횮ontrol컴커 � � 읕컴컴컴컴컴컴컴� 읕컴컴컴컴켸 읕컴컴컴컴� 읕컴컴컴컴컴컴� � 쿥13桁� �J 桁�W7 桁�W14 � � �5 桁�W15 � � 잎 桁�W5 桁�W8 � � 桁�W6 W2桁� 桁�W12 桁�W9 � � 桁�W4 W1桁� 桁�W11 � � WD1007A-WAH 桁�W10 � 읕컴컴컴컴컴� P2 旼커 P1 桁�W3 旼컴� 읒좋좋좋좋좋좋좋좋좋좋� 읒좋좋좋좋좋좋좋좋좋좋좋좋� Table 1 Jumper Position Function W1 2-3 Standard: BIOS Address Select (C8000-09FFF) W2 2-3 W3 Jumper Enables BIOS W1 2-3 BIOS Address Select (CA000-CBFFF) W2 1-2 W3 Jumper Enables BIOS W1 1-2 BIOS Address Select (CC000-CDFFF) W2 2-3 W3 Jumper Enables BIOS W1 1-2 BIOS Address Select (CE000-CFFFF) W2 1-2 W3 Jumper Enables BIOS W8 No Jumper Standard: WD1007 Mode. Firmware forces a 10 MHz ESDI drive to 35 sectors per track when using the Set Unformatted Bytes per Sector command. This mode supports a 1:1 interleave. W8 Jumper Allows the WD1007A-WAH to be used as a replacement board for the WD1005-WAH without reformatting the drive. The controller reads the Unformatted Bytes Per Sector from the drive. W9 No Jumper Standard: Chassis Ground Disconnected W10 No Jumper Standard: Digital Input Register Unlatched W11 No Jumper Standard: Diskette Change Enable w/FDC Option W12 No Jumper Standard: Secondary Address Select (1FX) W14 No Jumper Standard: Sector Translation Enabled Provides physical to logical translation** W14 Jumper Physical to logical translation disabled. W15 No Jumper Standard: 4 Bytes ECC W15 Jumper 7 Bytes ECC **Because some of the older operating systems can only recognize 17 sectors per track or a maximum of 1048 cylinders per drive, the WD1007A-WAH provides a translation scheme so that ESDI hard disk drives with 34-36 sector mode operation can be fully utilized in a PC AT. Hardware Installation WARNING MAKE SURE COMPUTER IS TURNED OFF AND POWER IS DISCONNECTED 1. Verify that your host computer has a at least a 200 watt power supply. If the disk drive(s) is(are) being installed internally, it is best to locate the controller in the nearest available expansion slot to the drive. 2. Remove the blank expansion slot bracket. Put the bracket away and save it for possible future use. The screw will be used to hold the new controller in place. 3. The terminating resistor must be present only on the last hard disk drive connected. If there are two drives, the terminating resistor must be present on the second drive. Verify proper setting of drive select switches for drive select 1 or 2. Refer to your system owner's manual for information about proper drive termination and select switches. Do not use the Radial Select Option on your drive. 4. Attach 34-pin control connector pin 1 to J1 on the controller board. Make sure that Pin 1 of the cable connector goes to Pin 1 on the controller board. Pin 1 of the cable connector is typically located on the color coded side of the cable. 5. Connect control cable to drive (s). 6. Attach 20-pin data connector to J2 (Drive C or 0). 7. Attach 20-pin data connector to J3 (Drive D or 1). 8. Connect data cables to drives. 9. Attach Winchester activity LED connector to J5. 10. Install controller board into the expansion slot. Make sure that the board is seated properly by pressing down on both ends of the board. Secure the board with the bracket screw. CAUTION WHEN ROUTING CABLES, BE CAREFUL NOT TO PINCH THEM. CABLES MUST NOT GET CAUGHT BETWEEN THE COVER AND THE BOARDS, NOR SHOULD THEY OBSTRUCT ANY AIR FLOW PATH FROM FANS OR VENTS.