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Updated graphics modes in README.md
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README.md
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README.md
@ -80,19 +80,31 @@ BCPL ROM, is also included on the Applecorn diskette.
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### Video Modes
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Two text video modes and one graphics mode are currently supported:
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- `MODE 6` and `MODE 7` - 40x24 text (in mode 7, chars $80 to $9F are converted
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to spaces)
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- `MODE 3` - 80x24 text.
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- `MODE 1` - Apple II high resolution mode. The physical resolution is 280x192
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pixels. This is mapped onto the normal BBC Micro 1280x1024 virtual resolution,
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with the origin at the bottom left of the screen.
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The following video modes are supported:
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- `MODE 0` (Apple IIGS only) - 4 colour 640x200 bitmapped mode, with
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80x24 text.
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- `MODE 1` (Apple IIGS only) - 16 colour 320x200 bitmapped mode, with
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40x24 text.
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- `MODE 2` - 6 colour 280x192 bitmapped mode, with 40x24 text.
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- `MODE 3` - monochrome text-only mode, 80x24.
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- `MODE 6` - monochrome text-only mode, 40x24.
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- `MODE 7` - monochrome text-only mode, 40x24. Chars $80 to $9F are converted
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to spaces in this mode.
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On Apple //e and //c, `MODE 0` will redirect to `MODE 3` and `MODE 1` will
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redirect to `MODE 6`.
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Graphics are supported in `MODE 2` only at present (`MODE 0` and `MODE 1`
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graphics to come shortly.)
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Following BBC Micro conventions, all graphics are drawn using a 1280x1024
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coordinate system, with the origin at the bottom left of the screen.
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_NOTE:_ You can set the startup video mode by holding down the appropriate number
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key while Applecorn starting (while it is loading the ROM file.)
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Andy McFadden's [FDraw library](https://github.com/fadden/fdraw) is used for
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efficient high resolution line and point plotting.
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efficient high resolution line and point plotting in `MODE 2`.
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### Escape Key
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