Page 13 - Computer_Science_F5

Computer Science The db->acc Transports a data word from the data bus into
the accumulator
Arithmetic
Transports a data word from the accumulator
Logic Unit acc->db
into the data bus
plus
Data from the data bus can be added
FOR ONLINE READING ONLY
minus
Data from the data base can substracted
Step 2: Simulate the movement of data from the input devices to other parts
of the computer such as Random Access Memory (RAM) as shown in
Figure 1.2 using the command given in Table 1.1.
(a) Enter data in the data input box. For this case, enter 100 as shown
in the data input box and press ENTER in the keyboard.

(b) Click the arrows with the command and observe how data
transfers from one location to another.

Figure 1.2: Simulation of data from input to RAM

Step 3: Repeat the procedures in step 2 with other input data and explore how
data moves form one part to another.
Questions
(a) Describe the relationship between the three parts of the computer processor.
(b) Does a bus system used for both data and instructions, allow the CPU to fetch
and execute instructions sequentially? Explain.

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for Advanced Secondary Schools

Computer Science Form 5.indd 4 23/07/2024 12:32