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Atari Mega Archive 1
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1990-04-11
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959b
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22 lines
b1pBOINGSTE.PRGqb3
A little demo demonstrating the speed of the blitter at performing
bit orientated memory moves. On PAL machines at least, it runs at 50
frames per second compared to about 4 frames per second doing the same
operation using only the 68000. Timing factors could upset the program on
an NTSC machine. In the initial lines of code I manually set the graphic
chip to 50 Hz, I am unsure as to the effect this has on an american STE
but if the effect is similar to setting a PAL machine to 60Hz then the
program should run without problems.
Also in the demo is some true stereo music, sampled at 6258Hz. The
quality of the sound at such a low sample rate is quite superb. And
finally at any one time there are approximately 400 colors on screen.
The space bar will pause the color cycling and the Q key will Quit
back to the desktop.
b2
Tony Barker.
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