Problem

Suppose the hypothetical processor of Figure 1.3 also has tow I/O instructions:0011 = Load...

Suppose the hypothetical processor of Figure 1.3 also has tow I/O instructions:

0011 = Load AC from I/O

0111 = Store AC to I/O

In these cases, the 12-bit address identifies a particular external device. Show the program execution (using format of Figure 1.4) for the following program:

1. Load AC from device 5.

2. Add contents of memory location 940.

3. Store AC to device 6.

Assume that the next value retrieved from device 5 is 3 and that location 940 contains a value of 2.

Figure1.3 Characteristics of a Hypothetical Machine

Figure 1.4 Example of Program Execution (contents of memory and registers in hexadecimal)

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Solutions For Problems in Chapter 1