Arithmetic circuits alone do not make a computer.
A computer needs memory, places to store and retrieve information, if it
is to have data that can be operated on. And, memory must itself be
describable in terms of our logical primitives. The exercises below
demonstrate how a small piece of memory might be built in Logg-O. |
- Figure 7.15 in your text shows a latch circuit. Use Logg-O to build your own latch circuit. Test it out to see that it performs as described in text. Then, save your circuit as file "latch.dat".
- Figure 7.17 shows how a latch (the "black box" just left of the center of the diagram)
can be connected to other Logg-O built-ins to produce a 1-bit memory cell.
Extend your latch circuit to implement this memory.
- Once you are convinced that your memory circuit performs as it should, save it in a file named "memory.dat".
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