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100644
48 lines (39 sloc)
1.5 KB
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--Script for writing to CHR-RAM count per frame
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--Emulator: Mesen 0.9.4
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--Rom: any with CHR-RAM
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--Author: spiiin
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writeToChr0 = 0;
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writeToChr1 = 0;
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function onStartFrame()
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--old frame ended, and new started.
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--we can measure byte counts writen only between frames
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writedBetweenFrames0 = writeToChr0;
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writedBetweenFrames1 = writeToChr1;
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end
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function onEndFrame()
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emu.log("Frame ended, chr0 writes: "..writeToChr0.." (between frames:"..writedBetweenFrames0..")"..", chr1 writes: "..writeToChr1.." (between frames:"..writedBetweenFrames1..")");
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writeToChr0 = 0;
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writeToChr1 = 0;
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end
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function highlightScanline()
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local state = emu.getState();
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local color = colorCode + state.ppu.scanline;
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--emu.log("scanline: "..tostring(state.ppu.scanline));
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emu.drawLine(0, state.ppu.scanline, 256, state.ppu.scanline, color, 1);
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end
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function onChrWrite(address, value)
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if (address < 0x1000) then
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writeToChr0 = writeToChr0 + 1;
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else
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writeToChr1 = writeToChr1 + 1;
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end;
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end
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emu.addEventCallback(onStartFrame, emu.eventType.startFrame);
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emu.addEventCallback(onEndFrame, emu.eventType.endFrame);
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emu.addMemoryCallback(onChrWrite, emu.memCallbackType.ppuWrite, 0x0000, 0x1FFF);
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emu.addMemoryCallback(highlightScanline, emu.memCallbackType.ppuWrite, 0x0000, 0x3FFF);
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emu.displayMessage("Script", "Script loaded.")