The EGSMP integrates a high performance 16-bit microprocessor (Hitachi H8/300H), that supports all the GSM terminal software, including Layer 1, 2 and 3 of the GSM protocol stack, the MMI and applications software such as data services, test and maintenance. The use of the standard H8 processor allows the use of HIOS, the Hitachi real time kernel, as well as a full range of software development tools including C compilers, debuggers and incircuit emulators. The EGSMP also integrates a high performance 16-bit Digital Signal Processor (DSP), which provides speech transcoding and supports all audio functions in both transmit and receive. In receive it equalizes the received signal using a 16-state (Viterbi) soft decision equalizer.