Manual: isaset

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 typi‐
       cally  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, pre‐
       serving 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)