68HC11 Second level board (Board "B")

Microprocessor 68HC11 A1..-8, E1..-9
Ram Memory 8K
Output port RS232C and current-loop midi
4 leds on-board on 4 bit of A port also for single-chip exsercitazions
Clock frequency: 4MHz
64 pins expansion Bus for connection to the other DENEB cards