INT 15 - Intel System Management Bus - GET DEVICE ADDRESSES AX = 53B0h BH = 06h BL = position in list to report CH = 6941h ('iA') Return: CF clear if successful AH = 00h (SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. OK) BH = number of SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. devices BL = SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. Device Address of device at position BL in list (see #00486) CF set if error AH = error code (06h,0Ah,86h) (see #00484) Desc: retrieves already assigned SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. device addresses Notes: this function is supported in INT 15h mode only bit 0 of the device address indicates read/write, so a device may be listed at both xxxxxxx0b and xxxxxxx1b SeeAlso: I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer. A0h [and I2C(also IIC; the "2" is superscripted) Inter-Integrated Circuit Bus -- A moderate-speed serial communications bus originally invented by Philips in the early 1980s for consumer-electronics applications, such as inter-chip communication in a television set or high-end stereo. The I2C bus has recently appeared on PCs in video capture boards and similar devices, as well as (surprisingly) SDRAM DIMMs (for the on-board serial EEPROM). The ACCESS.bus is a derivative of the I2C bus which forms the physical layer of the Universal Serial Bus. Similary, the SMBus (System Management Bus) also uses I2C as its physical layer..LST in general] (Table 00486) Values for System Management Bus predefined device addresses: 10h SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. host 12h Smart Battery charger 14h Smart Battery selector 16h Smart Battery 18h SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. Alert response 50h ACCESS.busA further development of the I2C bus which forms the physical layer of the Universal Serial Bus. Because ACCESS.bus is used for communication with external devices, it includes power and ground wires in addition to I2C's clock and data lines, and permits twice the current draw (6ma) on the clock and data lines. see also I2C, SMBus. host 58h LCD(Liquid Crystal Display) contrast controller 5Ah CCFL backlight driver 6Eh ACCESS.busA further development of the I2C bus which forms the physical layer of the Universal Serial Bus. Because ACCESS.bus is used for communication with external devices, it includes power and ground wires in addition to I2C's clock and data lines, and permits twice the current draw (6ma) on the clock and data lines. see also I2C, SMBus. default address 80h-86h PCMCIA socket controllers 88h VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. graphics controller 90h-96h unrestricted addresses 82h SMBus(System Management Bus) A derivative of the I2C bus used for communication between various components of a computer, such as smart batteries and their chargers. In contrast to I2C, SMBus specifies fixed voltage levels (instead of relative to the power supply voltage) and a 10 KHz minimum clock rate (I2C minimum is 0). SMBus also specifies several timings which are not required by I2C. See also I2C, ACCESS.bus. device default address