SYSTEM CONTROLLER/DATA BUFFER

The 82343 contains the system control and data buffering function in a 160-pin quad flatpack.

The 82343s functions are highly programmable via a set of internal configuration registers. Defaults on reset for the configuration registers mimic the compatibility requirements of the original IBM PC/AT* as closely as possible, The power-up defaults allow any possible configuration of the system to boot at the CPUs rated speed. However, operational capabilities may be temporarily reduced until the configuration registers are set to mirror the true system configuration. This normally occurs during BIOS power-on self-test in a manner completely transparent to the user.