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Update README.md

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@ -94,6 +94,15 @@ the ROM after Ctrl-Reset. Any user program in aux memory will be untouched.
For ROMs such as BASIC or COMAL, the `OLD` command can be used to recover the
program in memory.
### Special VDU Features
- `Ctrl-S` will pause the screen and `Ctrl-Q` will resume scrolling.
- The BBC Micro 'Copy Editor' function is supported. Use the Apple II
cursor keys to move the copy cursor and the `Tab` key to copy a character
from the copy cursor to the insert cursor.
- BBC Micro function keys are supported. Use Open Apple with the number
keys for the unshifted function keys.
### Star Commands
`*QUIT` - Terminate Applecorn and quit to ProDOS. Because the 'BBC Micro'
@ -314,9 +323,6 @@ Applecorn currently has the following limitations:
languages to work correctly. For example in BBC BASIC the following
commands work: `OPENIN`, `OPENOUT`, `OPENUP`, `BGET#` `BPUT#` `PTR#=`,
`EOF#`, `EXT#`.
- Missing operations include `OSGBPB` and `OSFSC`. These are required by
the BCPL language system, so currently it is not possible to load the
BCPL compiler for example.
- The VDU driver is quite primitive at present. Is supports 80 column
text mode (`MODE 0`) and 40 column text mode (`MODE 1`). There is
currently no graphics support.