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James Gregory 2013-12-31 11:06:31 +11:00
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@ -38,9 +38,18 @@ circumscribed arena.
Why am I telling you this? First, because it is a useful lesson for
programming.
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![](images/i.jpg) *All programming is performed within limitations, some of which can be bent or changed, but many of which cannot. You cannot change the maximum memory bandwidth of a VGA, or the maximum instruction execution rate of a 486. That is why the stunning 3D demos you see at SIGGRAPH have only passing relevance to everyday life on the desktop. A rule that Intel's chip designers cannot break is 8086 compatibility, much as I'm sure they'd like to, but of course the flip side is that although RISC chips are technically superior, they command but a small fraction of the market; raw performance is not the arena of competition. Similarly, you will often be unable to change the specifications for the software you implement.*
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> ![](images/i.jpg)
> All programming is performed within limitations, some of which can be
> bent or changed, but many of which cannot. You cannot change the maximum
> memory bandwidth of a VGA, or the maximum instruction execution rate of
> a 486. That is why the stunning 3D demos you see at SIGGRAPH have only
> passing relevance to everyday life on the desktop. A rule that Intel's
> chip designers cannot break is 8086 compatibility, much as I'm sure
> they'd like to, but of course the flip side is that although RISC chips
> are technically superior, they command but a small fraction of the
> market; raw performance is not the arena of competition. Similarly, you
> will often be unable to change the specifications for the software you
> implement.
### Breaking the Rules {#Heading3}