R O 2 0 3    RODIME

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                                                      Native|  Translation
                                                      ------+-----+-----+-----
Form                 5.25"/FH              Cylinders     321|     |     |
Capacity form/unform    16/      MB        Heads           6|     |     |
Seek time   / track  90.0/18.0 ms          Sector/track   17|     |     |
Controller           MFM / ST506           Precompensation
Cache/Buffer               KB              Landing Zone      319
Data transfer rate    0.625 MB/S int       Bytes/Sector      512
                      0.625 MB/S ext
Recording method     MFM                            operating  | non-operating
                                                  -------------+--------------
Supply voltage     5/12 V       Temperature *C        10 50    |
Power: sleep              W     Humidity     %        10 85    |
       standby            W     Altitude    km                 |
       idle               W     Shock        g         3       |     30
       seek               W     Rotation   RPM      3600
       read/write         W     Acoustic   dBA
       spin-up            W     ECC        Bit
                                MTBF         h      12000
                                Warranty Month
Lift/Lock/Park     NO           Certificates                                  

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                        L   A   Y   O   U   T
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RODIME   RO 200 SERIES USER MANUAL P/N USM0023 REV. B

  +--------------------------------+++++--------------------+
  |                                +++++Drive Select        |XX J3
  |                                4   1                    |XX Power
  |                                                         |
  |                                                         |XX
  |                                                      ++ |XX
  |                                             Terminator| |XX
  |                                             Restistor|| |XX J1
  |                                             Pack     || |XX
  |                                                      ++ |XX
  |                                                         |XX
  |                                                         |
  |                                                         |
  |                                                         |XX
  |                                                         |XX J2
  |                                                         |XX
  |                                                         |XX
  |                                                         |XX
  +---------------------------------------------------------+



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                      J   U   M   P   E   R   S
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RODIME   RO 200 SERIES  USER MANUAL P/N USM0023 REV. B

 Jumper Setting
 ==============

 Drive Select
 ------------
 Up to four drives may be connected to one host in a "daisy-chain"
 fashion. A 4-pole drive select switch is fixed to each drive. To
 identify a drive as number 1, close the first pole of this switch
 nearest the terminator pack. Similarly for drives 2, 3 and 4. Only
 ONE pole should be in the closed position. All "daisy-chained" drives
 should have the line terminator pack removed except for the last
 drive in the chain. All drives are supplied for single usage, that
 is, pole 1 is closed and the terminator pack is present.

        +------+------+------+------+------+
        |Drive |Pole  |Pole  |Pole  |Pole  |
        |Select|  1   |  2   |  3   |  4   |
        +------+------+------+------+------+
        |  1   |CLOSED|OPEN  |OPEN  |OPEN  |
        +------+------+------+------+------+
        |  2   |OPEN  |CLOSED|OPEN  |OPEN  |
        +------+------+------+------+------+
        |  3   |OPEN  |OPEN  |CLOSED|OPEN  |
        +------+------+------+------+------+
        |  4   |OPEN  |OPEN  |OPEM  |CLOSED|
        +------+------+------+------+------+


 J3   DC Power and pin connector assignments
 -------------------------------------------
      +------------+   pin 1    +12 VDC
      | 4  3  2  1 |   pin 2    +12 Volts Return
      +------------+   pin 3    + 5 Volts Return
                       pin 4    + 5 VDC



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                      I   N   S   T   A   L   L
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RODIME   RO 200 SERIES  USER MANUAL P/N USM0023 REV. B

 Notes on Installation
 =====================

 Drive mounting
 --------------

     horizontally             vertically
   +-----------------+   +--+             +--+ +------------------+
   |                 |   |  +-----+ +-----+  | |                  | x
   |                 |   |  |     | |     |  | x+----------------+x
 +-+-----------------+-+ |  |     | |     |  | ||x              x||
 +---------------------+ |  |     | |     |  | ||  x          x  ||
                         |  |     | |     |  | ||    x      x    ||
      x           x      |  |     | |     |  | ||      x  x      ||
 +------x------x-------+ |  +-----+ +-----+  | ||       xx       ||
 +-+------x--x-------+-+ +--+             +--+ ||     x    x     ||
   |       xx        |                         ||   x        x   ||
   |     x    x      |                         || x            x ||
   +---x--------x----+                         |x                x|
     x            x                           x++----------------++x

 Side brackets with tapped holes (6/32" UNC) are provided with each
 drive and permits base or side mounting. These brackets are fixed to
 the drive chassis via shock-absorbing grommets. The drive MAY BE
 ORIENTED IN ANY AXIS. When installing into an enclosure, at least 0.1
 inch clearance must be maintained around the entire drive to allow
 vibration isolation and to prevent obstruction of the breather filter
 and the creation of ground loops.


 Connectors
 ----------
 The RO 200 drive interfaces to host systems via a variant of the SA
 1000 interface which is becoming a de facto standard for 5  inch
 Winchester disc drives. There are separate connectors for data (MFM
 code), for control lines and for DC power. A chassis ground tab is
 also provided. The convention for control is that a TTL logical zero
 is false and a TTL logical one is false. Up to four drives may be
 connected to a host system and each drive is provided with a four-
 pole switch for selection. The control lines may be daisy-chained but
 the data lines MUST be radially (individually) connected to the host.


 Control signals for the drive are provided via the 34 pin edge
 connector (P1/J1). The pins are numbered 1 through 34 with the even
 pins located on the solder side of the board. Pin 2 is located on
 the end of the board connector closest to the DC power connector and
 is labelled. A key slot is provided between pins 4 and 6. The
 recommended mating connector is AMP ribbon connector A/N 88373-3.


 Radial connection of read/write data signals is provided via a 20 pin
 edge connector (P2/J2). The pins are numbered 1 through 20 with the
 even pins located on the solder side of the board. The recommended
 mating connector is AMP ribbon connector A/N 88373-6.


 DC power is provided via a 4 pin AMP Mate-N-Lok connector (P7/J7)
 P/N 350211-1, or equivalent, mounted via the solder side of the
 board. The recommended mating connector is AMP P/N 1-480424-0
 utilising  AMP pins P/N 350078-4.

 A ground connection is provided via a "Faston" connector AMP P/N
 61664-1 located on a metal stand-off on the chassis between the
 power and control signal connectors. However, the DC and chassis
 grounds are common on the drive and the use of the "Faston" connec-
 tor is not essential. The frame ground of the host system should be
 aproperly earthed.


 Cable Interconnection - 4 Drive System
 --------------------------------------

       HOST
   +-----------+                                +-----------------+
   |           +---o---Control------------------+J1     Drive 1   |
   |           |   |    +-------Data------------+J2               |
   |           |   |    |             +-Power---+J3  J4           |
   |           |   |    |             |         +-----+-----------+
   |           |   |    |             |    +-Frame----+
   |           |   |    |             |    |    +-----------------+
   |Controller |   o----+-------------+----+----+J1     Drive 2   |
   |           |   |    | +-----------+----+----+J2               |
   |           |   |    | |           o----+----+J3  J4           |
   |           |   |    | |           |    |    +----+------------+
   |           |   |    | |           |    o---------+
   |           |   |    | |           |    |    +-----------------+
   +-----------+   o----+-+-----------+----+----+J1     Drive 3   |
   |           |   |    | | +---------+----+----+J2               |
   |           +---+----+ | |         o----+----+J3  J4           |
   |           +---+------+ |         |    |    +-----+-----------+
   |           |   |        |         |    o----------+
   |Data       +---+--------+         |    |    +-----------------+
   |Separator  |   +------------------+----+----+J1     Drive 4   |
   |           +----------------------+----+----+J2               |
   |           |                      o----+----+J3  J4           |
   +-----------+                      |    |    +-----+-----------+
                       DC voltages----+    o----------+
                                           |
                                           +------- Frame Ground

 Note that, in the multiple drive configuration all data interface
 lines are radially connected to the host.



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                      F   E   A   T   U   R   E  S
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RODIME   RO 200 SERIES  USERS MANUAL P/N USM0023 REV. B


 Introduction
 ------------
 The Rodime RO 200 series of 5  inches (130 mm) Winchster disk drives
 provides fast access data storage for use with small business
 computers, terminal and microprocessor based systems. There are four
 models in the series, RO 201, RO 202, RO 203 and RO 204.


 Seek Time
 ---------
       +----------------------------------+--------+
       |                                  | RO 200 |
       +----------------------------------+--------+
       |Track-to-Track         msec. typ. |  18    |
       +----------------------------------+--------+
       |Average                msec. typ. |  90    |
       |                       msec. max. | 250    |
       +----------------------------------+--------+
       |Latency                msec. avg. |   8.3  |
       +----------------------------------+--------+


 Indicator and Fault Codes
 -------------------------
 Two red LED's fixed to the master electronics board are visible
 through the facia when they are illuminated.

 The "Power-On" LED is on when the drive is READY with no error
 condition present. It is also used to indicate fault conditions to
 the driev.

 The "Select" LED is on when the drice is selected by the host
 provided the "Power-On" LED is on.

 The "Power-On" LED is positioned closest to the centre of the facia.
 It is used to flash error messages should certain fault conditions
 arise on the drive. A four bit binary code is used (long flash =
 logical 1, short flash = logical 0) with the most significant bit
 occurring first:

 e.g. Short, short, long, short = 2 (0010)

    +------------+--------------------------------------------------+
    | Fault Code | Description                                      |
    +------------+--------------------------------------------------+
    | 01 (0001)  | No index track data burst                        |
    +------------+--------------------------------------------------+
    | 02 (0010)  | No Flag zero                                     |
    +------------+--------------------------------------------------+
    | 03 (0011)  | Motor speed outside +/- 1% tolerance at end of   |
    |            | power-up sequence                                |
    +------------+--------------------------------------------------+
    | 04 (0100)  | Motor speed outside +10%, tolerance in normal    |
    |            | operation                                        |
    +------------+--------------------------------------------------+
    | 05 (0101)  | Flag zero stays TRUE                             |
    +------------+--------------------------------------------------+
    | 06 (0110)  | STEP received while WRITE GATE is TRUE           |
    +------------+--------------------------------------------------+
    | 07 (0111)  | WRITE FAULT                                      |
    +------------+--------------------------------------------------+
    | 08 (1000)  | Not used                                         |
    +------------+--------------------------------------------------+
    | 09 (1001)  | Not used                                         |
    +------------+--------------------------------------------------+
    | 10 (1010)  | No INDEX                                         |
    +------------+--------------------------------------------------+
    | 11 (1011)  | Motor not up to speed                            |
    +------------+--------------------------------------------------+

 Fault codes 1, 2, 3, 5, 10 and 11 are monitored during the initial
 power-up sequence of the drive. The remaining codes, namely 4, 6 and
 7 are constantly monitored during normal operation. All fault codes
 are latched by the processor and the drive must be restarted to
 clear. Codes 3, 4, 10 and 11 generate an interface WRITE FAULT as do
 those fault conditions leading to code 7.


 Illegal Address Map
 -------------------
 Each drive is accompanied by a map indicating the addresses of
 sectors which should not be used by the host. This map (label) is
 fixed to the base casting wall. These illegal sectors have been
 identified during unit test in the factory and contain a repeatable
 disk defect, greater than one bit in length. No such illegal address
 will exist in cylinders 0, 1 and 2.

 An illegal address is specified by cylinder, head and sector. It
 should be noted that the format used for this purpose is 33 sectors
 of 256 bytes each. The maximum number of illegal addresses is:

 Model Number                        201  202  203  204
 Max. number of illegal addresses     2    4    6    8