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Remove heading ids, let pandoc generate them

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James Gregory 2014-01-06 22:51:26 +11:00
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chapter-31.md
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@ -11,9 +11,9 @@ pages: 587-605
---
## Chapter 31\
Higher 256-Color Resolution on the VGA {#Heading1}
Higher 256-Color Resolution on the VGA
### When Is 320x200 Really 320x400? {#Heading2}
### When Is 320x200 Really 320x400?
One of the more appealing features of the VGA is its ability to display
256 simultaneous colors. Unfortunately, one of the *less* appealing
@ -43,7 +43,7 @@ games use.
So. Let's get started.
### Why 320x200? Only IBM Knows for Sure {#Heading3}
### Why 320x200? Only IBM Knows for Sure
The first question, of course, is, "How can it be possible to get higher
256-color resolutions out of the VGA?" After all, there were no unused
@ -86,7 +86,7 @@ designing the chip. Whatever the reason, mode 13H is really a
400-scan-line mode masquerading as a 200-scan-line mode, and we can
readily end that masquerade.
### 320x400 256-Color Mode {#Heading4}
### 320x400 256-Color Mode
Okay, what's so great about 320x400 256-color mode? Two things: easy,
safe mode sets and page flipping.
@ -122,7 +122,7 @@ That's why I like 320x400 256-color mode. The next step is to understand
how display memory is organized in 320x400 mode, and that's not so
simple.
#### Display Memory Organization in 320x400 Mode {#Heading5}
#### Display Memory Organization in 320x400 Mode
First, let's look at why display memory must be organized differently in
320x400 256-color mode than in mode 13H. The designers of the VGA
@ -187,7 +187,7 @@ turned off, and selecting byte mode for video data display. All that's
done in the `Set320x400Mode` subroutine in Listing 31.1, which we'll
discuss next.
#### Reading and Writing Pixels {#Heading6}
#### Reading and Writing Pixels
The basic graphics functions in any mode are functions to read and write
single pixels. Any more complex function can be built on these
@ -624,7 +624,7 @@ an adequately fast—and often *very* fast—version for 320x400 mode of
whatever graphics function you need. If you're not all that concerned
with speed, `WritePixel` and `ReadPixel` should meet your needs.
### Two 256-Color Pages {#Heading7}
### Two 256-Color Pages
Listing 31.2 demonstrates the two pages of 320x400 256-color mode by
drawing slanting color bars in page 0, then drawing color bars slanting
@ -911,7 +911,7 @@ The displays produced by Listing 31.2 make it clear that 320x400
256-color mode can produce effects that are simply not possible in any
16-color mode.
### Something to Think About {#Heading8}
### Something to Think About
You can, if you wish, use the display memory organization of 320x400
mode in 320x200 mode by modifying `Set320x400Mode` to leave the