**Dies ist eine alte Version des Dokuments!**
Computerarchitektur & Assemblersprache
In diesem Teil geht es darum zu verstehen, was die Grundfunktionsweise eines Computers ist.
Theorie
Instruction Set LMC
| Code (dec) | Code (bin) | Name | Description |
|---|---|---|---|
| 0 | 00000 | HLT | Stop (Little Man has a rest). |
| 1 | 00001 | ADD | Add the contents of the memory address to the Accumulator |
| 2 | 00010 | SUB | Subtract the contents of the memory address from the Accumulator |
| 3 | 00011 | STA or STO | Store the value in the Accumulator in the memory address given. |
| 4 | 00100 | This code is unused and gives an error. | |
| 5 | 00101 | LDA | Load the Accumulator with the contents of the memory address given |
| 6 | 00110 | BRA | Branch - use the address given as the address of the next instruction |
| 7 | 00111 | BRZ | Branch to the address given if the Accumulator is zero |
| 8 | 01000 | BRP | Branch to the address given if the Accumulator is zero or positive |
| 9 | 01001 | INP or OUT | Input or Output. Take from Input if address is 1, copy to Output if address is 2. |
| 9 | 01001 | OTC | Output accumulator as a character if address is 22. (Non-standard instruction) |
| DAT | Used to indicate a location that contains data. |
Aufgaben
- Tipp: Wenn immer du mit dem LMC arbeitest, solltest du dessen Instruction Set zur Hand haben (z.B. in ausgedruckter Form). Dieses musst du nicht auswendig können.
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