1ISASET(8) System Manager's Manual ISASET(8)
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6 isaset - set ISA registers
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10 isaset [-y] addrreg datareg address value [mask] #for I2C-like access
11 isaset [-y] -f address value [mask] #for flat address space
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15 isaset is a small helper program to set registers visible through the
16 ISA bus.
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20 -f Enable flat address space mode.
21 -y Disable interactive mode. By default, isaset will wait for a
23 confirmation from the user before messing with the ISA bus. When
24 this flag is used, it will perform the operation directly. This
25 is mainly meant to be used in scripts.
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29 Four options must be provided to isaset. addrreg contains the ISA
30 address of the address register for the chip to probe; datareg contains
31 the address of the data register. Both addresses are integers between
32 0x0000 and 0x3FFF. Usually, if the chip's base address is 0x0nn0, the
33 address register is at 0x0nn5 and the data register is at 0x0nn6. The
34 most common base address for hardware monitoring chips is 0x0290. For
35 Super-I/O chips, address register is typically at 0x2E with data regis‐
36 ter at 0x2F. The address and value parameters are two integers between
37 0x00 and 0xFF. isaset will write value value to address address. An
38 optional mask can be provided as a fifth parameter, preserving unmasked
39 bits at the written location.
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43 In flat mode, two parameters must be provided. address contains the ISA
44 address of the register to write to; it is an integer between 0x0000
45 and 0xFFFF. Basically, it is the sum of the chip's base address and the
46 chip register's address. isaset will write value value at this address.
47 An optional mask can be provided as a third parameter, preserving
48 unmasked bits at the written location.
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52 Poking around in ISA data space is extremely dangerous. Running isaset
53 with random parameters can cause system crashes, data loss, and worse!
54 Be extremely careful when using this program.
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58 i2cset(8), isadump(8)
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62 Mark D. Studebaker, and the lm_sensors group (http://www.lm-sen‐
63 sors.org/)
64 This manual page was shamelessly ripped from the i2cset and isadump
66 manual pages by Jean Delvare.
67 May 2005 ISASET(8)