NAME

       isaset - set ISA registers

SYNOPSIS

       isaset [-y] [-W|-L] addrreg datareg address value [mask] #for I2C-like access
       isaset -f [-y] [-W|-L] address value [mask] #for flat address space

DESCRIPTION

       isaset is a small helper program to set registers visible through the ISA bus.

OPTIONS

       -f     Enable flat address space mode.

       -y     Disable  interactive  mode.   By default, isaset will wait for a confirmation from the user before
              messing with the ISA bus.  When this flag is used, it will perform the operation  directly.   This
              is mainly meant to be used in scripts.

       -W     Perform a 16-bit write.

       -L     Perform a 32-bit write.

OPTIONS (I2C-like access mode)

       Four  options  must  be provided to isaset.  addrreg contains the ISA address of the address register for
       the chip to probe; datareg contains the address of  the  data  register.   Both  addresses  are  integers
       between  0x0000  and  0x3FFF.   Usually, if the chip's base address is 0x0nn0, the address register is at
       0x0nn5 and the data register is at 0x0nn6.  The most common base address for hardware monitoring chips is
       0x0290.  For Super-I/O chips, address register is typically at 0x2E with  data  register  at  0x2F.   The
       address  and  value  parameters are two integers between 0x00 and 0xFF.  isaset will write value value to
       address address.  An optional mask can be provided as a fifth parameter, preserving unmasked bits at  the
       written location.

OPTIONS (flat address space mode)

       In flat mode, two parameters must be provided.  address contains the ISA address of the register to write
       to;  it is an integer between 0x0000 and 0xFFFF.  Basically, it is the sum of the chip's base address and
       the chip register's address.  isaset will write value value at this address.  An  optional  mask  can  be
       provided as a third parameter, preserving unmasked bits at the written location.

WARNING

       Poking  around in ISA data space is extremely dangerous.  Running isaset with random parameters can cause
       system crashes, data loss, and worse!  Be extremely careful when using this program.

SEE ALSO

       i2cset(8), isadump(8)

AUTHOR

       Mark D. Studebaker, and the lm_sensors group (https://hwmon.wiki.kernel.org/lm_sensors)

       This manual page was shamelessly ripped from the i2cset and isadump manual pages by Jean Delvare.

                                                   April 2011                                          ISASET(8)