INT 15 - Intel System Management Bus - REAL MODE CONNECT AX = 53B0h BH = 02h CX = 6941h ('iA') Return: CF clear if successful AX = 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. Real mode code segment BX = offset of entry point into 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. BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. Interface CX = 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. Real mode data segment CF set if error AH = error code (01h,02h,0Ah,86h) (see #00484) AL = sub-error code if error code is 02h (see #00485) Desc: connect to 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. interface; once connected, all 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. calls are made to the supplied entry point instead of INT 15 (with registers identical to those described here for INT 15) Notes: Support for this function is optional this function is only supported in INT 15 mode when implemented SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=05h