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)