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Documented *CODE and *LINE.

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@ -267,17 +267,63 @@ notation to specify physical drive as an abbreviation.
### Star Commands
Applecorn implements the command line interface for MOS built-in functions
and also for accessing the filingsystem. Following Acorn conventions, these
commands are all invoked with a leading asterix `*`.
#### Applecorn Commands
These commands are specific to Applecorn.
`*QUIT` - Terminate Applecorn and quit to ProDOS. Because the 'BBC Micro'
lives in auxiliary memory, you can usually restart Applecorn by running it
again and recover your program with `OLD`.
again and (assuming you are using BBC BASIC) recover your program with `OLD`.
`*HELP [topic]` - Prints out information similar to the same command on the BBC micro.
- `*HELP` shows the version number and the current language ROM in use,
followed by a list of any other 'sideways ROMs' in the virtual system.
`*FAST` - turn Apple II accelerator on (supports GS, Ultrawarp and ZipChip).
`*SLOW` - turn Apple II accelerator off (supports GS, Ultrawarp and ZipChip).
#### MOS Commands
The following commands correspond to those in the original Acorn MOS.
`*HELP [topic]` - Prints out information in a manner similar to the same
command on the BBC micro.
- `*HELP` with no argument shows the Applecorn MOS version number and the
current language ROM in use, followed by a list of any other 'sideways
ROMs' in the virtual system.
- `*HELP FILE` shows the available filing system star commands.
- `*HELP HOSTFS` shows the available HostFS star commands.
- `*HELP MOS` shows the MOS star commands unrelated to the filing system.
`*ECHO This is some text` - echo a line of text to the screen.
`*FX a[,x,y]` - invokes `OSBYTE` MOS calls.
`*OPT` - sets file system options. `*OPT 255,x` may be used to enable or
disable debugging output.
`*KEY keynum <text>` - Programs a user-defined function key.
**NOT YET IMPLEMENTED**.
`*CODE x,y` - Invokes user machine code through the user vector `USERV`.
6502 registers X and Y are initialized according to the value of the two
numeric arguments provided.
`*LINE <text>` - Invokes user machine code through the user vector `USERV`.
6502 registers X and Y are initialized to point at the command-line text
provided (X is least significant byte, Y most significant byte.)
`*TV n` - This command does nothing. It is provided for compatibility because
it is common for BBC Micro programs to use the `*TV` command to adjust the
vertical position of the picture on the monitor.
#### HostFS Filing System Commands
This set of commands relates to filesystem operations, which would correspond
to the Disk Filing System (DFS) or Advanced Disk Filing System (ADFS) of the
BBC Micro.
`*CAT [<*objspec*>]` (or `*. [*objspec*]`) - Simple listing of the files in the
specified directory, or the current working directory ('current prefix') if
no directory argument is given.
@ -373,16 +419,6 @@ it, as though it were being typed on the keyboard.
`*CLOSE` - close any open files (including spool file, if open.)
`*ECHO This is some text` - echo a line of text to the screen.
`*FX a[,x,y]` - invokes `OSBYTE` MOS calls.
`*OPT` - sets file system options. `*OPT 255,x` may be used to enable or
disable debugging output.
`*FAST` - turn Apple II accelerator on (supports GS, Ultrawarp and ZipChip).
`*SLOW` - turn Apple II accelerator off (supports GS, Ultrawarp and ZipChip).
### Audio Support
@ -632,4 +668,3 @@ hardware capabilities of the BBC Micro and the Apple II.
function keys and so on are currently not supported.