| NAME | ADDRESS | FUNCTION |
|---|
| HEX | DECIMAL |
|---|
| ACPTR | $FFA5 | 65445 | Input byte from serial port |
| CHKIN | $FFC6 | 65478 | Open channel for input |
| CHKOUT | $FFC9 | 65481 | Open channel for output |
| CHRIN | $FFCF | 65487 | Input character from channel |
| CHROUT | $FFD2 | 65490 | Output character to channel |
| CIOUT | $FFA8 | 65448 | Output byte to serial port |
| CINT | $FF81 | 65409 | Initialize screen editor |
| CLALL | $FFE7 | 65511 | Close all channels and files |
| CLOSE | $FFC3 | 65475 | Close a specified logical file |
| CLRCHN | $FFCC | 65484 | Close input and output channels |
| GETIN | $FFE4 | 65508 | Get character from keyboard queue (keyboard buffer) |
| IOBASE | $FFF3 | 65523 | Returns base address of I/O devices |
| IOINIT | $FF84 | 65412 | Initialize input/output |
| LISTEN | $FFB1 | 65457 | Command devices on the serial bus to LISTEN |
| LOAD | $FFD5 | 65493 | Load RAM from a device |
| MEMBOT | $FF9C | 65436 | Read/set the bottom of memory |
| MEMTOP | $FF99 | 65433 | Read/set the top of memory |
| OPEN | $FFC0 | 65472 | Open a logical file |
| PLOT | $FFF0 | 65520 | Read/set X,Y cursor position |
| RAMTAS | $FF87 | 65415 | Initialize RAM, allocate tape buffer, set screen $0400 |
| RDTIM | $FFDE | 65502 | Read real time clock |
| READST | $FFB7 | 65463 | Read I/O status word |
| RESTOR | $FF8A | 65418 | Restore default I/O vectors |
| SAVE | $FFD8 | 65496 | Save RAM to device |
| SCNKEY | $FF9F | 65439 | Scan keyboard |
| SCREEN | $FFED | 65517 | Return X,Y organization of screen |
| SECOND | $FF93 | 65427 | Send secondary address after LISTEN |
| SETLFS | $FFBA | 65466 | Set logical, first, and second addresses |
| SETMSG | $FF90 | 65424 | Control KERNAL messages |
| SETNAM | $FFBD | 65469 | Set file name |
| SETTIM | $FFDB | 65499 | Set real time clock |
| SETTMO | $FFA2 | 65442 | Set timeout on serial bus |
| STOP | $FFE1 | 65505 | Scan stop key |
| TALK | $FFB4 | 65460 | Command serial bus device to TALK |
| TKSA | $FF96 | 65430 | Send secondary address after TALK |
| UDTIM | $FFEA | 65514 | Increment real time clock |
| UNLSN | $FFAE | 65454 | Command serial bus to UNLISTEN |
| UNTLK | $FFAB | 65451 | Command serial bus to UNTALK |
| VECTOR | $FF8D | 65421 | Read/set vectored I/O |
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