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- 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
- are registered trademarks of Microsoft Corporation.
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- WD1002A-27X
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- USER GUIDE
-
- Introduction
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- The WD1002A-27X controller is designed for use with RLL type hard
- disk drives only. Consult your drive manual or contact the drive
- manufacturer to determine that your drive type is RLL compatible.
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- The WD1002A-27X is an easy to install, RLL controller, which
- interfaces either one or two Winchester disk drives to a single host
- computer. It is to be used as the primary hard disk controller in
- IBM PC XT or compatible systems.
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- 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:
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- Two hard disk cables (3 if using 2 hard disk drives); RLL drive;
- screwdriver; MSDOS Version 2.0 or later; *DEBUG utility; *FDISK
- utility; *Format utility (*normally included with MSDOS)
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- Preparation of Controller
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- 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
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- Before you can install your WD1002A-27X you will need to be certain
- that the jumpers (small shorting plugs) located at position W1 and W2
- are correctly set. There are only two possible settings, both ON or
- both OFF.
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- ┌────────Drive 0───────────────────────────┐
- │ ┌J4┐ Data Cable 34pin Control Cable │
- │ └──┘ ┌──J2──┐ ┌──────J1───────┐ │
- │ LED └──────┘ └───────────────┘ │
- │ ┌──J3──┐ │
- │ └──────┘ │
- │ Drive 1 │
- │ Data Cable │
- │ │
- │ ┌W2─┐ │
- │ │───│ │
- │ └W1─┘ │
- │ │
- │ ┌─BIOS──┐ │
- │ │ ( │
- │ └───U8──┘ │
- │ │
- └───────┐ ┌───────┘
- │ WD1002A-27X │
- └┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┴┘
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- Before setting the jumpers, you will need to know the parameters of
- your RLL drive. For your convenience, we have provided a list of the
- most common drives. You may access the list by returning to the
- previous menu. If your drive has 4 heads, a formatted capacity of
- 32 megabytes, and fewer than 663 cylinders, the controller jumper
- settings (W1 and W2) should be (ON).
-
- Note: Some versions of DOS or other operating systems will not
- recognize the 26 sector per track feature of RLL drives. Jumpers ON
- translates the configuration characteristics into a 17 sector per
- track format recognized by the Operating System.
-
- WITH JUMPER SETTINGS ON, YOU MAY USE THE SIMPLIFIED FORMATTING
- INSTRUCTIONS ON PAGE 4.
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- DRIVES WITH GREATER THAN 663 CYLINDERS
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- If your drive has more than 663 cylinders, jumpers must be OFF and
- you must use the Dynamic Formatting procedure. (See page 7)
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- IF YOUR DRIVE IS NOT LISTED, YOU WILL NEED TO OBTAIN THE PARAMETERS
- FROM YOUR DRIVE MANUFACTURER OR MANUAL.
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- Preparation of Drive
-
- WARNING
- MAKE SURE COMPUTER IS TURNED OFF
- AND POWER IS DISCONNECTED
-
- There are 3 steps in preparing your drive to interface with the
- WD1002A-27X Controller.
-
- 1) Power for drive is supplied by host computer through an extra
- connector from its power supply. Verify that the host computer
- contains a 135 watt power supply.
-
- 2) 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.
-
- 3) Drive Select: If the controller cable has a twisted portion
- between two drive connectors, both drives must be jumpered for Drive
- Select 2. If controller cable has no twisted portion, first drive
- select should be 1, second drive select 2.
-
- See your drive manual for drive preparation and installation
- procedures.
-
- Note: The hard disk drive cable is not the same cable used for
- floppy disk drives.
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- Installation Into Host Computer
-
-
- WARNING
- MAKE SURE COMPUTER IS TURNED OFF
- AND POWER IS DISCONNECTED
-
- Installation of Controller into Host Computer
-
- Remove blank expansion slot bracket and save for future use. The
- screw will be used to hold the controller board into place.
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- INSTALL CONTROLLER INTO ANY AVAILABLE SLOT EXCEPT SLOT 8
-
- Connect the 34-pin (wide control cable) connector 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.
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- Connect the 20-pin (data cable) to J2 (Drive 0 Data Connector) on the
- controller board. Make sure that Pin 1 on the cable is connected to
- Pin 1 on the controller board.
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- If a second drive is being installed, connect the Drive 1 data cable
- to J3.
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- Verify that the disk drive(s) is(are) installed properly. This
- includes correct placement of drive select jumpers and drive
- terminator installation. Refer to the disk drive installation manual
- for further information. DO NOT USE THE RADIAL SELECT OPTION.
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- Install the drive(s) per manufacturer's instructions.
-
- 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.
-