Regarding the Intel 8085 CPU, does it have six sign flags in its flag register?

Introduction:
The 8085 microprocessor maintains status information in its flag register. This question checks familiarity with the specific flags present and dispels the misconception that multiple 'sign' flags exist.

Given Data / Assumptions:

• Architecture: Intel 8085.
• Claim: '8085 has 6 sign flags.'

Concept / Approach:

The 8085 flag register contains five user-visible flags: Sign (S), Zero (Z), Auxiliary Carry (AC), Parity (P), and Carry (CY). The other bits are either fixed or unused. There is exactly one sign flag (S). Therefore, claiming 'six sign flags' is incorrect.

Step-by-Step Solution:

Verification / Alternative check:

8085 diagrams show the 8-bit flag register with positions for S, Z, AC, P, CY and non-flag bits (some reserved or constant).

Why Other Options Are Wrong:

'True' implies multiple sign flags, which do not exist in 8085.

Common Pitfalls:

Confusing 'status flags' with 'sign flags'; misreading documentation tables and counting internal/reserved bits as distinct sign indicators.

Final Answer:

False