PORTIBM PC Portable (uses same BIOS as XT) 00E2 - S3 Trio64V+ - 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. PORTIBM PC Portable (uses same BIOS as XT) Range: PORTIBM PC Portable (uses same BIOS as XT) 00E2h or PORTIBM PC Portable (uses same BIOS as XT) 00E8h; default depends on external pin, but can be reprogrammed via chip's CR6F SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 00E8h,#M0079