19 lines
648 B
Lua
19 lines
648 B
Lua
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-----------------------
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-- Name: Log Parallax
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-- Author: spiiin
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-----------------------
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-- Draws a red line over each scanline that CPU writes to $2005 or $2006 occurred
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PPUSCROLL = 0x2005;
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colorCode = 0x4000FF00;
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function onScroll(address, value)
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local state = emu.getState();
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emu.log("Scrolling change. Scanline: "..state.ppu.scanline.." Value:"..value);
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local color = colorCode + 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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emu.addMemoryCallback(onScroll, emu.memCallbackType.cpuWrite, PPUSCROLL, PPUSCROLL+1);
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emu.displayMessage("Script", "Log Parallax")
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