Michael Abrash’s Graphics Programming Black Book (Special Edition) [Michael Abrash] on *FREE* shipping on qualifying offers. No one has done . Graphics Programming Black Book Special Edition has 65 ratings and 3 reviews. — Includes everything that master Abrash has ever written about optimizati. Michael Abrash’s classic Graphics Programming Black Book is a compilation of Michael’s writings on assembly language and graphics.
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This device driver could send the result anywhere you might desire. How can you do this?
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I would consider 5 percent a good result. Fortunately, the offers another timer mode, mode 2 divide-by-N modewhich is both a good substitute for square wave mode and a perfect mode for precision timing. From that bit of sublime idiocy we can learn much about divining the full value of an instruction.
The Zen timer is an excellent tool for evaluating code performance over the entire spectrum of PC-compatible computers. Thanks to the Coriolis gang for their tireless hard work: The Game of Life 2. In other words, the program will add each byte in a specified file in turn into a bit value. If you look at Doom, there wasn’t a lot of assembler even back in the early ‘s. Dead Cats and Lightning Lines 0.
Those are indeed important considerations—to persons and companies that develop and distribute software. Why the difference in execution times? Does anybody have a mirror?
Graphics Programming Black Book Special Edition by Michael Abrash
The two approaches are functionally interchangeable but not equivalent from a performance standpoint, and which is back depends on the particular context. Get to Know Us. A Post-Mortem and a Glimpse into the Future 1. A chance to do the right thing as a programmer. Abrasb Loadholtes rated it it was amazing Nov 19, Someone else gets sheets of plastic and lines the walls of the bathroom to keep the moisture in, and yet another student gets a bucket full of rocks.
There Ain’t No Such Thing as the Fastest Code
Knowing that Jeff Duntemann is an aficionado of such esoterica who do you know who owns an album by The Peppermint Trolley Company? After graduating, it quickly became obvious that I was going to have trouble paying my rent working in the Apple Abrahs market in the late eighties, so I was forced to make a very rapid move into the Intel PC environment.
You know, I wrote everything in that book either late at night or on weekends, and I never really knew if it much mattered to anyone feedback was a lot harder to come by in pre-Internet days ; reading these comments goes a long way to making all that work worthwhile.
Not that this variation between models makes the Zen timer one whit less useful—quite the contrary. The extra horsepower a superb assembly language implementation gives a program is bokk bothering with only in the context of a good design.
Michael Abrash’s Graphics Programming Black Book Special Edition: Table of Contents
Abraeh a Wonderful Life 4. The opposite sequence—reading the time-of-day count and then the timer count—can result in a 54 ms inaccuracy in the other direction. In fact, they had neglected the effects of video wait states as well, so the code they discussed was actually much slower than their estimates. AT-class memory systems routinely insert 1 or more wait states, however. As a result, timer interrupts are recognized by the PC, allowing the BIOS to maintain an accurate system clock time over the timing period.
Now we have to figure out how to search through a file by loading it into that large buffer in chunks. Restartable blocks do minimize the overhead abrasy DOS file-access calls in Listing 5. Still, some of those cycle-eaters can be minimized by keeping instructions short, using the registers, using byte-sized memory operands, and accessing display memory as little as possible.
I moved via the byte-by-byte approach, and the overhead of driving back and forth made for miserable performance. Execution times are given for Listing 1.
The important point is that display memory is not very fast compared to normal system memory. The second reason is the hallmark of the mediocre programmer.