1. STAX : 8T states
  2. SPHL : 6T States
  3. SIM : 7 T States
  4. STA : 12 T states
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Option 2 : SPHL : 6T States

The various T states required for instructions are:

1. STAX:

1 opcode fetch (4T)

1 memory write (3T)

Total 7T states

2. SPHL

1 Opcode Fetch (6T)

3. SIM

1 Opcode Fetch (4T)

4. STA 2000 H

1 Opcode fetch (4T)

2 Memory Read ( 3T + 3T = 6T)

1 Memory write (3T)

Total 13 T states 

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