A common Hardware Development System mainframe supports the entire ST72xx family of MCUs, in conjunction with the appropriate ST7xxx-DBE Dedication Board Emulator. Real-time source level emulation, allows viewing and breakpoint setting on high level source code rather than on disassembled target code, for optimum user friendliness. 64 KBytes of user modifiable and configurable emulation RAM, allows memory mapping of all ST72 family devices as well as modelling hypothetical memory configurations. Unlimited breakpoints may be set for any opcode fetch or any address access, and conditions may be defined for the generation of 2 external synchronisation signals.