1ISASET(8)                   System Manager's Manual                  ISASET(8)
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NAME

6       isaset - set ISA registers
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SYNOPSIS

10       isaset  [-y] [-W|-L] addrreg datareg address value [mask] #for I2C-like
11       access
12       isaset -f [-y] [-W|-L] address value [mask] #for flat address space
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DESCRIPTION

16       isaset is a small helper program to set registers visible  through  the
17       ISA bus.
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OPTIONS

21       -f     Enable flat address space mode.
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23       -y     Disable  interactive  mode.  By  default, isaset will wait for a
24              confirmation from the user before messing with the ISA bus. When
25              this  flag is used, it will perform the operation directly. This
26              is mainly meant to be used in scripts.
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28       -W     Perform a 16-bit write.
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30       -L     Perform a 32-bit write.
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OPTIONS (I2C-like access mode)

34       Four options must be provided  to  isaset.  addrreg  contains  the  ISA
35       address of the address register for the chip to probe; datareg contains
36       the address of the data register. Both addresses are  integers  between
37       0x0000  and  0x3FFF. Usually, if the chip's base address is 0x0nn0, the
38       address register is at 0x0nn5 and the data register is at  0x0nn6.  The
39       most  common base address for hardware monitoring chips is 0x0290.  For
40       Super-I/O chips, address register is typically at 0x2E with data regis‐
41       ter at 0x2F.  The address and value parameters are two integers between
42       0x00 and 0xFF. isaset will write value value to  address  address.   An
43       optional mask can be provided as a fifth parameter, preserving unmasked
44       bits at the written location.
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OPTIONS (flat address space mode)

48       In flat mode, two parameters must be provided. address contains the ISA
49       address  of  the  register to write to; it is an integer between 0x0000
50       and 0xFFFF. Basically, it is the sum of the chip's base address and the
51       chip register's address. isaset will write value value at this address.
52       An optional mask can be  provided  as  a  third  parameter,  preserving
53       unmasked bits at the written location.
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WARNING

57       Poking around in ISA data space is extremely dangerous.  Running isaset
58       with random parameters can cause system crashes, data loss, and  worse!
59       Be extremely careful when using this program.
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SEE ALSO

63       i2cset(8), isadump(8)
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AUTHOR

67       Mark  D.  Studebaker, and the lm_sensors group (https://hwmon.wiki.ker
68       nel.org/lm_sensors)
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70       This manual page was shamelessly ripped from  the  i2cset  and  isadump
71       manual pages by Jean Delvare.
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75                                  April 2011                         ISASET(8)
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