To start, press the switch on the left.
The counter will start to load number 3,2,1,0 into the 4 RAM address. The middle number panel will show 3,2,1,0 by sequence.
After load each number, it will be sent to a 3-bit adder. The number will be added by the current number in a 3 bit latch. So latch panel will show 3, 5, 6, 6, 1, 3, … (when number larger than 7 it will loop back to X mod 8)
Structure:
Top part from left to right:
address encoder(8 and gates, 2 not gates in bottom)
4 address x 2 bit RAM (8 D-flip-flop)
address de-coder (8 and gates and 2 DAC used as or gate)
3 bit adder (5 XOR gate, 4 and gate, 2 or gate)
Bottom part from left to right:
Clock (logic train, 1 NOT gate)
Write signal input (logic train)
Counter
Part of address encoder (2 not gates)
Reset button (do not touch)
RAM current address value (digital panel)
3 bit latch (3 D-flip-flop)
Latch current value (digital panel)
