ISASET(8)                                                                                                              ISASET(8)



NAME
       isaset - set ISA registers


SYNOPSIS
       isaset [-y] addrreg datareg address value [mask] #for I2C-like access
       isaset [-y] -f 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.


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 loca-
       tion.


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.



                                                            May 2005                                                   ISASET(8)