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Update README.md

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@ -73,7 +73,7 @@ Two text video modes and one graphics mode are currently supported:
- `MODE 6` and `MODE 7` - 40x24 text (in mode 7, chars $80 to $9F are converted - `MODE 6` and `MODE 7` - 40x24 text (in mode 7, chars $80 to $9F are converted
to spaces) to spaces)
- `MODE 3` - 80x24 text. - `MODE 3` - 80x24 text.
- `MODE 2` - Apple II high resolution mode. The physical resolution is 280x192 - `MODE 1` - Apple II high resolution mode. The physical resolution is 280x192
pixels. This is mapped onto the normal BBC Micro 1280x1024 virtual resolution, pixels. This is mapped onto the normal BBC Micro 1280x1024 virtual resolution,
with the origin at the bottom left of the screen. with the origin at the bottom left of the screen.
@ -489,7 +489,7 @@ AUX BANK:
## Limitations ## Limitations
Applecorn currently has the following limitations: Applecorn currently has the following limitations:
- Not all MOS calls are implemented. - Most MOS calls are implemented.
- There is file I/O support for file-orientated (`OSFILE`) file - There is file I/O support for file-orientated (`OSFILE`) file
operations. This allows `LOAD` and `SAVE` to work in languages such as operations. This allows `LOAD` and `SAVE` to work in languages such as
BASIC or COMAL. BASIC or COMAL.
@ -498,15 +498,9 @@ Applecorn currently has the following limitations:
languages to work correctly. For example in BBC BASIC the following languages to work correctly. For example in BBC BASIC the following
commands work: `OPENIN`, `OPENOUT`, `OPENUP`, `BGET#` `BPUT#` `PTR#=`, commands work: `OPENIN`, `OPENOUT`, `OPENUP`, `BGET#` `BPUT#` `PTR#=`,
`EOF#`, `EXT#`. `EOF#`, `EXT#`.
- The VDU driver is quite primitive at present. Is supports 80 column - Many `OSBYTE` and `OSWORD` calls are implemented.
text mode (`MODE 0`) and 40 column text mode (`MODE 1`). There is
currently no graphics support.
- Only a limited number of `OSBYTE` and `OSWORD` calls are implemented.
More will be added in due course.
- Special BBC Micro functions such as sound, A/D interfaces, programmable - Special BBC Micro functions such as sound, A/D interfaces, programmable
function keys and so on are currently not supported. function keys and so on are currently not supported.
- The Applecorn MOS command line is currently quite limited. More commands
will be added in due course.