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    Length: 2988 (0xbac)
    Types: HLP, TextFile
    Names: »SLEW.HLP«

└─⟦24d56d853⟧ Bits:30000744 8mm tape, Rational 1000, DFS, D_12_6_5 SEQ293
    └─ ⟦this⟧ »SLEW.HLP« 
└─⟦9031b0687⟧ Bits:30000407 8mm tape, Rational 1000, DFS, D_12_7_3
    └─ ⟦this⟧ »SLEW.HLP« 

TextFile

SLEW

The SLEW program is used to re-configure a Spectra-Logic SL-121 or
SL-121+ tape/disk controller for use in an R1000.  The controller
uses an EEPROM to record several dozen options and these options
are updated via SLEW.  To invoke the SLEW program you may boot it
from tape or type:

    CLI> x slew

The program will initialize itself and then prompt:

    Disk/Tape Controller Number :

Enter the controller number of the board you wish to modify.  Controllers
are related to devices as follows:

     Disk    Tape        Controller
    0 - 3    0 - 3            0
    4 - 7    4 - 7            1
    8 - 11   8 - 11           2
   12 - 15                    3

For the SLEW program to correctly modify a controller's EEPROM the
controller must have at least one disk drive attached; this is a
controller limitation.  The SLEW program will neither read nor
write to any disks or tapes.

Once SLEW knows the controller number it begins a menu mode of
operation.  There are currently five menu options as follows:

    1 => Write and verify EEPROM
    2 => Verify EEPROM
    3 => Display EEPROM location
    4 => Modify EEPROM location
    5 => Exit

1.) Write and verify.

    This is the option used most frequently.  It updates the contents
    of the entire EEPROM based on questions asked of the user.  The
    questions are asked for each of the four possible disks attached
    to the controller.  Answer the questions carefully.  Incorrect
    responses may prevent the system from booting after running SLEW.
    Once all disk drive information has been entered the SLEW program
    will ask:

    Is EEPROM write enabled (SW-4 open) [Y] ?

    The SL-121 and SL-121+ controllers have a write-protect feature.
    If SW-4 on the edge of the controller board is in the closed
    position the SLEW program cannot write to the EEPROM.  Before
    you answer this question make sure that the switch is OPEN.
    If you answer 'N' to this question the SLEW program will not try
    to write to the EEPROM.  You may use this as an escape back to
    the menu.  Writing the EEPROM takes several seconds.  It is
    followed by a short verify phase.  Once the EEPROM has been
    updated, close SW-4 to write protect the data.
\f


2.) Verify EEPROM

    The verify option allows the user to insure that the EEPROM
    checksum is correct.  It does not check to insure that the data
    contained in the EEPROM is valid.

3.) Display EEPROM location

    The display option allows the user to examine the contents of a
    single EEPROM location.  It is most useful for internal debugging
    of new EEPROM values.

4.) Modify EEPROM location

    The modify option allows the user to change the contents of a
    single EEPROM byte and modify the EEPROM checksum.  This option
    is for internal use only and should not be used without a through
    understanding of the controller and the R1000 I/O processor
    kernel.

5.) Exit

    The exit option terminates the SLEW program.