&FFF7| OSCLI | Execute a command
| &FFF4| OSBYTE | Perform general byte-wise function
| &FFF1| OSWORD | Perform general function with control block
| &FFEE| OSWRCH | Send a character to output stream
| &FFEC| OSWRCR | Send a carriage return to output stream
| &FFE7| OSNEWL | Send a newline sequence to output stream
| &FFE3| OSASCI | Send an ascii sequence to output stream
| &FFE0| OSRDCH | Wait for character from input stream
| | |
| &FFDD| OSFILE | Perform actions on whole files
| &FFDA| OSARGS | Read or write information on open files and filing systems
| &FFD7| OSBGET | Get a single byte from open file
| &FFD4| OSBPUT | Put a single byte to open file
| &FFD1| OSGBPB | Read or write blocks of data and information
| &FFCE| OSFIND | Open or close a file
| | FSCV | Filing system control
| | |
| &FFCB| NVWRCH |
| &FFC8| NVRDCH |
| &FFC5| GSREAD | Read a character from string parser
| &FFC2| GSINIT | Initialise general string parser
| &FFBF| OSEVEN | Generate an event
| &FFBC| VDUCHR |
| &FFB9| OSRDSC | Read a byte with screen and ROM paged in
| &FFB3| OSWRSC | Write a byte with screen and ROM paged in
| | |
| ErrorMsgs | | Error messages
| ErrMsgs.zip | | Raw unedited error message dump
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