The following picture shows a new 10 bit register for the adress-module. This register holds the adress if a command wants to access the memory, for example LDA M(X),,,Load the accu with the value stored in adress X. This new register holds the adress, a multiplexer is then switching between the program counter or this new register to copy one of them to the adressbus-register. Thats the way the memory is accessed.

The register was finished in one day and is tested...so the next days I will integrate it into the adress-module.