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12 lines
625 B
Markdown
12 lines
625 B
Markdown
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# Apple ]\[ hires
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## Structure of the hires screen in RAM
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The Apple ]\[ has 2 hires pages. One in $2000-$3FFF. The second one in $4000-$5FFF. Each page is thus 8192 bytes long.
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The dimensions of one hires page is 40 bytes wide and 192 lines high. 40x192 = 7680 bytes. 512 bytes are "missing" and in fact not used/displayed.
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The hires screen is divided in 3 sections of 64 lines. Each section is then divided in 8 sub-sections of 8 lines, each itself divided in 8 sub-sub-sections representing the lines themselves.
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To better understand this division, it's easier to POKE bytes into RAM and see what happens.
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A POKE 8192,
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