| Mnemonic, mode
| Hex
| Binary
|
| Instruction
|
|
|---|
| LDA,i
| C0
| 1100 x000
|
| Load into AC from immediate
|
| LDA,d
| C1
| 1100 x001
|
| Load into AC from memory address
|
STA,i
| C1
| 1100 x001
|
| [ILLEGAL INSTRUCTION]
|
| STA,d
| E1
| 1110 0001
|
| Store from AC into memory
|
| ADDA,i
| 70
| 0111 0000
|
| Add AC + immediate (into AC)
|
| ADDA,d
| 71
| 0111 0001
|
| Add AC + memory (into AC)
|
| SUBA,i
| 80
| 1000 0000
|
| Subtract AC - immediate (into AC)
|
| SUBA,d
| 81
| 1000 0001
|
| Subtract AC - memory (into AC)
|
|
| | |
| I/O instructions>
|
| CHARI,d
| 49
| 0100 1001
|
| Character input to memory
|
| CHARO,i
| 50
| 0100 1000
|
| Character output from immediate
|
| CHARO,d
| 51
| 0101 1001
|
| Character output from memory
|
| DECI,d
| 31
| 0011 0001
|
| Read a decimal number into memory.
|
| DECO,i
| 38
| 0011 1000
|
| Write a decimal number from immediate.
|
| DECO,d
| 39
| 0011 1001
|
| Write a decimal number from memory.
|
|
|
|
| | |
| Branch instructions>
|
| STOP
| 00
| 0000 0000
|
| Stop the computer!
|
| BR
| 04
| 0000 0100
|
| Branch to specified address
|
Add two numbers together: