Overview
- Object ID : 2613 (2013-06-17)
- Author : Kwabena W. Agyeman | added by Archiver
- Microcontroller : Propeller 1
- Category : Display
- Languages : PASM, SPIN
- Licence : Other
Content
A 640 x 480 2-4 Color VGA bitmap driver that runs on one cog. The code has been fully optimized with a super simple spin interface for maximum speed and is also fully commented.
Provides full support for:
- Plotting characters in spin, in both 2 and 4 color mode.
- Plotting pixels in spin, in both 2 and 4 color mode.
The horizontal resolution may be any value that satisfies these rules:
- The value is between 1 and 640.
- The value is a factor of 640.
- The value is divisible by 16 if in 1 color mode.
- The value is divisible by 32 if in 2 color mode.
The vertical resolution may be any value that satisfies these rules:
- The value is between 1 and 480.
- The value is a factor of 480.
In two color mode the driver needs a display buffer in longs that is ((horizontalResolution * verticalResolution) / 32). The entire screen may have only two colors. Those two colors may be choosen from a 64 color palette.
In four color mode the driver needs a display buffer in longs that is ((horizontalResolution * verticalResolution) / 16). The entire screen may have only four colors. Those four colors may be choosen from a 64 color palette.
This list of features is not comprehensive. Please download the source code and run the included demo to gain a better understanding of this driver.