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 (http://www.lm-sensors.org/)

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

                                                   April 2011                                          ISASET(8)