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Fixed Space Invaders buffer update (the left-most pixel of every byte is bit 0, not bit 7 as in PC video adapters)

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This commit is contained in:
Jeff Parsons 2016-05-02 16:20:54 -07:00
commit 7c6eb85811
1 changed files with 0 additions and 22 deletions
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22
modules/pc8080/lib/video.js
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@ -235,28 +235,6 @@ Video.prototype.setPixel = function(imageData, x, y, rgb)
* and then update the cell cache to match. Since initCache() sets every cell in the cell cache to an
* invalid value, we're assured that the next call to updateScreen() will redraw the entire (visible) video buffer.
*
* Example
* -------
*
* The initial Space Invaders screen displays an "S" (part of the word "SCORE") at the end of these rows:
*
* 2520 00 42 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .B..............
* 2530 00 00 00 00 00 00 00 00-00 00 00 00 00 00 32 00 ..............2.
* 2540 00 41 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .A..............
* 2550 00 00 00 00 00 00 00 00-00 00 00 00 00 00 49 00 ..............I.
* 2560 00 49 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .I..............
* 2570 00 00 00 00 00 00 00 00-00 00 00 00 00 00 49 00 ..............I.
* 2580 00 59 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .Y..............
* 2590 00 00 00 00 00 00 00 00-00 00 00 00 00 00 49 00 ..............I.
* 25A0 00 66 01 00 00 00 00 00-00 00 00 00 00 00 00 00 .f..............
* 25B0 00 00 00 00 00 00 00 00-00 00 00 00 00 00 26 00 ..............&.
*
* 32 ..11..1. .1..11..
* 49 .1..1..1
* 49 .1..1..1
* 49 .1..1..1
* 26 ..1..11.
*
* @this {Video}
* @param {number} n (where 0 <= n < getRefreshRate() for a normal update, or -1 for a forced update)
*/