| Address | Label | Description | 
|---|
| 6000 | DOSINIT | DOS function: Initializes DOS | 
| 6003 | RUNX    | DOS function: Executes ABS file | 
| 6006 | LOADX   | DOS function: Loads ABS file | 
| 6009 | SELROUT | DOS function: PREPARE/CLOSE/OPEN/RESIZE | 
| 600C | GETNC   | DOS function: Get next byte from DOSBUF0 and increment bufferpointer | 
| 600F | DR      | DOS function: Read physical sector to specified DOSBUF | 
| 6012 | DW      | DOS function: Write physical sector from specified DOSBUF | 
| 6015 | PREP    | DOS function: Prepare a file | 
| 6018 | OPEN    | DOS function: Open a file | 
| 601B | LOAD    | DOS function: Load an ABS file | 
| 601E | RUN     | DOS function: Load and execute an ABS file | 
| 6021 | CLOSE   | DOS function: Close a file | 
| 6024 | CHOP    | DOS function: Delete a file | 
| 6027 | PROTE   | DOS function: Direct RET | 
| 602A | POSIT   | DOS function: Random access initializing | 
| 602D | READ    | DOS function: Random access, read logic sector | 
| 602E | WRITE   | DOS function: Random access, write logic sector | 
| 6033 | GET     | DOS function: Read next byte from buffer | 
| 6036 | GETR    | DOS function: Read next byte from buffer with offset | 
| 6039 | PUT     | DOS function: Write a byte sequenciality to buffer | 
| 603C | PUTR    | DOS function: Write a byte to buffer with offset | 
| 603F | BSP     | DOS function: Set offsetposition for buffer to zero (3) | 
| 6042 | BLKTF   | DOS function: Fill block with data | 
| 6045 | TRAP    | DOS function: Initializes DOS ON ERROR | 
| 6048 | RENAM   | DOS function: Change name for open file | 
| 604B |         | DOS function: Invalid (goes for few loops) | 
| 604E |         | DOS function: Invalid (goes for few loops) | 
| 6051 |         | DOS function: Invalid (goes for few loops) | 
| 6054 |         | DOS function: Invalid (goes for few loops) | 
| 6057 |         | DOS function: Invalid (goes for few loops) | 
| 605A |         | DOS function: Invalid (goes for few loops) | 
| 605D | EXIT    | DOS function: Close all files and call CMDINIT | 
| 6060 | DCWAI   | DOS function: Intialize a drive, wait untill drive is ready, read error/status | 
| 6063 | DW.0    | DOS function: Write sector from DOSBUF0 | 
| 6066 | DR.0    | DOS function: Read sector to DOSBUF0 |