The digital Simulation using Logic World
The complete system was simulated using the very good
software "Logic World". A very simple relay was designed,
this relay (and a diode) was used to build the complete design.
The following picture set shows an overview about the
simulation and a detailed picture of the 16 bit ALU:
The realization of the system using 24V relays
The first step of the realization of the system was to test the
realys, check out if the circuits will work in reality as good
as they worked in the simulation. For this tests some test
boards and an oscilloscope where used to find out the timing
parameters of the relays:
The results of the tests where amazing...the slowest relays
where closed or opened in 7,5 ms. Thats not bad for a
mechanical switch.
The realization of the system startet with the 16 bit
instruction register. Now the control unit is running 5 NOP
command per second.
