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acorn atom and acorn system series • 2x CPU Clock - Chuckie Egg & Colour Test

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Using the 2x CPU clock speed, I have noticed a few things.

Firstly, with Chuckie Egg, when using 1x CPU speed, the game plays properly, but I get a glitchy screen.
ChuckieGlitches.jpg
If, however, I switch to 2x CPU speed, the screen glitches disappear, but the machine no longer responds to the keyboard, and Hen Man jumps constantly like a complete loon.

On the Colour Test module from the AtoMMC SD card image, in 1xCPU speed I see normal colours.
ColourTest1_Lo.jpg
In 2xCPU speed I see a reduced colour palette.
ColourTest1_Hi.jpg
Any thoughts as to these issues? Are they known problems?

Statistics: Posted by dublevay — Sun Feb 09, 2025 10:45 pm



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