Question

III. THE INTEL 8088 PROCESSING ENVIRONMENT use the below processing environment diagram as a reference. AH BH General Registers AL AX - Accumulator Register BX - Base Register CL CX Count Register DE. DX.Data Register Segment Registers CS Code Segment DS-Data Segment SS.Stack Segment ES - Extra Segment CH DH Program Counter SP- Stack Pointer BP - Base Pointer S-Source Index DI - Destination Index IP - Instruction Pointer FLAGS Flag Register OD TISZ A P 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Answer 1

a. Hexadecimal value 0000h is equivalent to 0000000000000000 in binary.

As all the 16 bits are 0 in the flag register with value 0000h, none of the flags are set.

b. Hexadecimal value 0004h is equivalent to 0000000000000100 in binary.

The bit 2 is set to 1 and all the other 15 bits are 0 in the flag register with value 0004h. P flag is the bit 2 in flag register. Hence P flag is set.

c. Hexadecimal value 0041h is equivalent to 0000000001000001 in binary.

The bits 0 and 6 are set. All the other 14 bits are 0 in the flag register with value 0041h, C and Z flags are bit 0 and bit 6 in flag register respectively. Hence flags C and Z are set.