ISASET(8)						      System Manager's Manual							 ISASET(8)

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)