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Clean up the CPU/ChipSet interface, and get the PC8080 Video component ready to actually do something

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This commit is contained in:
Jeff Parsons 2016-05-01 10:13:43 -07:00
commit 8c5ab8d73b
19 changed files with 1210 additions and 993 deletions
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18
modules/pc8080/lib/video.js
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@ -50,11 +50,19 @@ if (NODE) {
* screenWidth: width of the screen canvas, in pixels
* screenHeight: height of the screen canvas, in pixels
* screenColor: background color of the screen canvas (default is black)
* aspectRatio
* frameBuffer
* interruptRate (eg, 120)
* refreshRate (eg, 60)
* rotation (eg, 90)
* screenRotation: the amount of counter-clockwise rotation required (eg, 90)
* aspectRatio (eg, 1.33)
* bufferAddr: the starting address of the frame buffer (eg, 0x2400)
* bufferCols: the width of a single frame buffer row, in pixels (eg, 256)
* bufferRows: the number of frame buffer rows (eg, 224)
* bufferBits: the number of bits per pixel (eg, 1)
* interruptRate: normally the same as (or some multiple of) the refreshRate (eg, 120)
* refreshRate: how many times updateScreen() should be called per second (eg, 60)
*
* We record all the above values now, but we defer creation of the frame buffer until our initBus()
* handler is called. At that point, we will also compute the extent of the frame buffer, determine the
* appropriate "cell" size (ie, the number of pixels that updateScreen() will fetch and process at once),
* and allocate our cell cache.
*
* @constructor
* @extends Component