Question

In the 8085 microprocessor, the RST6 instruction transfers the program execution to the following location :

• A. 30H
• B. 24H
• C. 48H
• D. 60H

Hint:

RST vector addresses in 8085: \[ RST0=00H \] \[ RST1=08H \] \[ RST2=10H \] \[ RST3=18H \] \[ RST4=20H \] \[ RST5=28H \] \[ RST6=30H \] \[ RST7=38H \]

Answer 1

The Correct Option is B

Concept: In the 8085 microprocessor, restart instructions (RST) are vectored interrupts. The address associated with restart instruction is: \[ \text{RST address}=8\times n \] where: \[ n=0,1,2,\ldots,7 \] The result is obtained in hexadecimal form.

Step 1: Identify the restart number. Given instruction: \[ RST6 \] Thus: \[ n=6 \]

Step 2: Apply restart address formula. Using: \[ \text{Address}=8\times n \] Substituting: \[ =8\times 6 \] \[ =48_{10} \]

Step 3: Convert decimal to hexadecimal. \[ 48_{10}=30_{16} \] Hence: \[ RST6 \rightarrow 30H \]

Step 4: Write the final answer. Therefore, the correct option is: \[ \boxed{(A)\ 30H} \]