| registers 寄存器 | contents 內容 | |
|---|---|---|
| 1. PC(IP) | Address | |
| 2. MAR | Address | |
| 3. MDR | Data/Instruction 數據/指令 |
⇔ |
| ⬇️ | ||
| 4. IR | instruction 指令 | |
| ⇫提取周期 解碼、執行 |
⇫fetch cycle CU (decode) ⬇️ ALU | |
| 5. ACC | ||
| 6. PSR | overflow滿溢, negative負數, zero零, parity, carry進位 |
| addr | RAM 主記憶體 |
| : | |
| 901 | 1 |
| 902 | 3 |
| 903 | 4 |
PC: program counter 程序計數器 IP: instruction pointer MAR: memory address register 位址 MDR: memory data register 數據/指令 IR: instruction register 指令 ACC: accumulator 累加器 PSR: program status register 狀態 Process Control Blocks (PCB)fetch-decode-execute-cycles.txt
