The STA instruction in the 8085 has 13 T states, 4 for opcode fetch, 3 for low half immediate address fetch, 3 for high half immediate address fetch, and 3 for data write.
STA[20H] and STA20H
In the 8085, the LDA instruction loads the accumulator from memory, while the STA instruction stores the accumulator to memory. LDA is a read, while STA is a write. LDA is opcode 3AH, while STA is opcode 32H.
STA 3000H is an 8085 instruction that says to store the accumulator at memory location 3000H.
STA is used to store the content of the accumulator in to the specified memory address. for example STA 4200. it stores the content of accumulator at 4200.
In the 8085, the LDA instruction loads the accumulator from memory, while the STA instructionstores the accumulator to memory. LDA is a read, while STA is a write. LDA is opcode 3AH, while STA is opcode 32H.
The STA 4200H instruction in the 8085 requires 4 machine cycles and 13 T states to complete its fetch, processing, and execution. Cycle One: Opcode fetch, 3 T states plus one opcode process state. Cycle Two: Opcode address byte 00H fetch, 3 T states Cycle Three: Opcode address byte 42H fetch, 3 T states Cycle Four: Accumulator store, 3 T states. Each cycle will have additional T-Ready states as needed by the READY pin. 13 T states is the minimum. The LDA instruction will also require 13 T states, with the last cycle being a read cycle instead of a write cycle.
Mvi c lda 4150h mov b,a lda 4151 sub b jnc loop cma inr a inr c sta 4152 mov a,c sta 4153 hlt
Lxi h, 2000h mov a,m mov b,a inx h mov a,m add b sta 2002h hlt
Mvi a, 04h 3e mvi b, 04 h 04 add b 06 sta 2050 04 hlt 80 32 50 20 76
probably STA stands for Student Travel Agency :) STA Travel - Student Travel Australia. Hope that helps, M
Stuttering by Ben's Brother
Words that can be made with the letters 'sta' are a, as, at.