Converting Propeller Programs Document
blittled
Posts: 681
I'm starting a document that will explain how to convert programs from one propeller board to another. I will be working with the protoboard, obc's modified protoboard, spin studio, demo board, Hydra, Hybrid and PropRPM. I only have experience with the modified protoboard so any advice or comments from anyone else's experience is welcomed. Once I have it done I'll post it on this thread. Thanks in advance for any input.
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What electronics need - MORE POWER!!!!!!!
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What electronics need - MORE POWER!!!!!!!
Comments
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Timothy D. Swieter, E.I.
www.brilldea.com - Prop Blade, LED Painter, RGB LEDs, uOLED-IOC, eProto for SunSPOT, BitScope
www.tdswieter.com
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Changing the crystal would not change the video "circuitry" you just need to change the XinFreq to the correct value for the crystal that you are using
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Brian
uController.com - home of SpinStudio - the modular Development system for the Propeller
PropNIC - Add ethernet ability to your Propeller! PropJoy - Plug in a joystick and play some games!
SD card Adapter - mass storage for the masses Audio/Video adapter add composite video and sound to your Proto Board
Most of the easy video modes, where the bits per pixel are 1 or 2, means a waitvid spans 16 or 32 pixels. At TV resolutions, that's a long time. Plenty of speed options in that case. Probably will work just fine below the 80Mhz reference. This would be true for both bitmaps and tiles. For the harder ones, say partial frames at 1 or 2 bits per pixel for only 8 pixels, or where one whole byte is consumed per pixel, you more or less need the higher speed clocks to get stuff done. The waitvids come along too quickly for pointers and HUB data fetches to occur. 80Mhz and 96Mhz are what you want for these. Same for advanced video renderers with sprites and such. The bit manipulation required to combine sprites into scan lines takes a lot of instructions.
>96Mhz might not be stable. And I think that depends on the input xtal frequency too.
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Post Edited (potatohead) : 12/4/2008 3:19:56 AM GMT