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Update README.md
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README.md
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README.md
@ -69,16 +69,20 @@ is set to `&0E0`.
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### Video Modes
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Two text video modes are currently supported:
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- 40x24 `MODE 6` and `MODE 7` (in mode 7, chars $80 to $9F are converted
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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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- 80x24 `MODE 3`
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We plan to support HGR graphics eventually.
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- `MODE 3` - 80x24 text.
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- `MODE 2` - 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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_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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### Escape Key
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The BBC Micro uses interrupts extensively and the Escape key is handled
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