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cbmeeks/zx_spectrum_vram_calc.js

Last active June 3, 2017 06:54
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ZX Spectrum Pixel Address Calculator
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zx_spectrum_vram_calc.js
var addr = function(L, C, R) {
return 16384 + 2048 * Math.floor(L / 8) + 32 * (L - 8 * Math.floor(L / 8)) + 256 * R + C;
};
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cbmeeks commented Nov 24, 2015

L = Line Number
C = Column Number
R = Row Number (0 - 7) within the Line

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cbmeeks commented Nov 24, 2015

hexString = addr.toString(16);

and reverse the process with:

yourNumber = parseInt(hexString, 16);

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