Remove heading ids, let pandoc generate them
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James Gregory
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@ -13,9 +13,9 @@ pages: 423-448
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# Part II
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## Chapter 23\
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Bones and Sinew {#Heading1}
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Bones and Sinew
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### At the Very Heart of Standard PC Graphics {#Heading2}
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### At the Very Heart of Standard PC Graphics
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The VGA is unparalleled in the history of computer graphics, for it is
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by far the most widely-used graphics standard ever, the closest we may
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@ -50,7 +50,7 @@ well underway.
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We'll start our exploration with a quick overview of the VGA, and then
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we'll dive right in and get a taste of what the VGA can do.
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### The VGA {#Heading3}
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### The VGA
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The VGA is the baseline adapter for modern IBM PC compatibles, present
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in virtually every PC sold today or in the last several years. (Note
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@ -103,7 +103,7 @@ rather to start you down the road to understanding the VGA.
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Let's begin.
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### An Introduction to VGA Programming {#Heading4}
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### An Introduction to VGA Programming
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Most discussions of the VGA start out with a traditional "Here's a block
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diagram of the VGA" approach, with lists of registers and statistics.
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@ -128,7 +128,7 @@ conceptual level, letting the code itself demonstrate the implementation
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details. We'll return to many of these concepts in more depth later in
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this book.
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### At the Core {#Heading5}
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### At the Core
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A little background is necessary before we're ready to examine Listing
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23.1. The VGA is built around four functional blocks, named the CRT
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@ -247,7 +247,7 @@ fixed. Moreover, a great deal of graphics software now uses word
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> course, this method only works if the GC Index register remains
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> unchanged throughout the loop.
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#### Linear Planes and True VGA Modes {#Heading6}
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#### Linear Planes and True VGA Modes
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The VGA's memory is organized as four 64K planes. Each of these planes
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is a linear bitmap; that is, each byte from a given plane controls eight
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@ -867,7 +867,7 @@ cseg ends
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end start
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```
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#### Smooth Panning {#Heading7}
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#### Smooth Panning
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The first thing you'll notice upon running the sample program is the
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remarkable smoothness with which the display pans from side-to-side and
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@ -972,7 +972,7 @@ should be set to 1.
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> reinventing the wheel and because the BIOS may well mask
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> incompatibilities between the IBM VGA and VGA clones.
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#### Color Plane Manipulation {#Heading8}
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#### Color Plane Manipulation
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The VGA provides a considerable amount of hardware assistance for
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manipulating the four display memory planes. Two features illustrated by
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@ -1050,7 +1050,7 @@ first pass; the VGA is a complicated beast, and learning about it is an
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iterative process. We'll be going over these features again, in
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different contexts, over the course of the rest of this book.
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#### Page Flipping {#Heading9}
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#### Page Flipping
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When animated graphics are drawn directly on the screen, with no
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intermediate frame-composition stage, the image typically flickers
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@ -1156,7 +1156,7 @@ designing programs for the VGA.
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To see the program run in 640x200 16-color mode, comment out the `EQU`
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line for `MEDRES_VIDEO_MODE`.
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### The Hazards of VGA Clones {#Heading10}
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### The Hazards of VGA Clones
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Earlier, I said that any VGA that doesn't support the features and
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functionality covered in this book can't properly be called VGA
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@ -1186,7 +1186,7 @@ is that if you're going to use oversized virtual bitmaps and pan around
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them, you should take great care to test your software on a wide variety
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of VRAM- and DRAM-based VGAs.
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### Just the Beginning {#Heading11}
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### Just the Beginning
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That pretty well covers the important points of the sample VGA program
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in Listing 23.1. There are many VGA features we didn't even touch on,
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@ -1196,7 +1196,7 @@ VGA's resources, and in general to give you an initial sense of what VGA
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programming is like. Starting with the next chapter, we'll begin to
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explore the VGA systematically, on a more detailed basis.
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### The Macro Assembler {#Heading12}
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### The Macro Assembler
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The code in this book is written in both C and assembly. I think C is a
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good development environment, but I believe that often the best code
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