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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The truth of the matter is abraah the is a bit processor that often performs like an bpok processor. Everything happened so fast, and under so much pressure, that sometimes I wonder how any of us made it through that without completely burning out. ZTimerOn saves the context of the calling code, disables interrupts, sets timer 0 of the to mode 2 divide-by-N modesets the initial timer count to 0, restores the context of the calling code, and returns.

Always consider the alternatives; a bit of clever thinking and program redesign can go bblack long way. I know what you’re thinking. I have said time and again that optimization is pointless until the design is settled.

Thanks to DRAM refresh, variations of up to 8. Take a moment to examine some interesting performance aspects of the C implementation, and all should become much clearer. His Graphics Programming Black Book is similarly great, and covers topics so general and wide ranging that the title becomes a bit of a misnomer.

First, the video circuitry can take as much as about 90 percent of the available display memory access time, as shown in Figure 4.

Philip rated it really liked it Mar 21, If the prefetch queue is empty at the start, the sequence could take 40 cycles. Alternatively, you could think of each SHR in Listing 4. This text features assembler optimization for a variety of problems including searching algorithms, and records the author’s approaches to optimizing code for the evolving line of Intel CPUs, from the on to the early Pentium lines. Carve out the critical code en masse and move it into assembly, and try to avoid calls and returns even in your assembly code.

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But what else do they do? Some will criticize the book for being archaic in its intimate details for platforms of the time. Thanks to the decidedly quirky nature of the x86 family CPUs, assembly language differs fundamentally from other languages, and is undeniably harder to work with.

Is performance still an issue in this era of cheap computers and super-fast Pentium computers? Finally, DOS has to search its own buffers to see if the desired byte has already been read, read it from the disk if not, store the byte in the specified location, and return. DMA stands for direct memory access, the ability of a device other than the boook control the bus and access memory directly, without any help from the If you keep all files in the same directory, the “Previous” and “Next” links at the hook and end of each chapter will work provided you have downloaded those chapters.

Many chapters are done in assembler, for example. Square wave mode is not very useful for precision timing because it counts down by two twice per timer interrupt, thereby rendering exact timings impossible. John Carmack, id Software. You should see what they pay for science fiction—even to the guys who win awards!

The Best Optimizer is between Your Ears 4.

Michael Abrash’s Graphics Programming Black Book, Special Edition

Why start at the lowest level? Scaled and three-dimensional graphics, which spend a great deal of time performing calculations often using blaxk slow floating-point arithmetictend to suffer less. Instructions with only register operands tend to be shorter in terms of bytes than instructions with memory operands, and when it comes to performance, shorter is usually better.

In the same chapter, Mr.

Michael Abrash’s Graphics Programming Black Book | Hacker News

All of this makes perfect sense given that the whole point of the wait state mechanism is to allow a device to stretch out any access to itself for however much time it needs to perform the access. Wait states are nothing more or less than wasted time as far as the CPU and your program are concerned. Thanks for the kind words, everyone – this brings back a lot of memories for me too. Reduced instruction fetching lowers minimum execution time minimum execution time is 4 cycles times the number of instruction bytes and often leads to faster overall execution.

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The addresses accessed by the refresh DMA accesses are arranged so that taken together they properly refresh all the memory in the PC. Lists with This Book. I remember the Denthor tutorials! Well, the obvious advantage is that any two bit registers, or any bit register and any constant, or any two bit registers and any constant, can be added together, with the result stored in any register. This circuitry must constantly read display memory in order to obtain the information used to draw the characters or dots displayed on the screen.

On the original based IBM PC, timer 1 of the timer chip is programmed at power-up to generate a signal once every 72 cycles, or once every The loop in Listing 7. I particularly like chapters V and VI. Reports State of Cloud Each timer channel of the can operate in any of six modes.

Just like in college, the class topic doesn’t matter when the instructor is a brilliant teacher. For instance, Listing 4. Since a bit MUL on the executes in between and cycles and is only 2 bytes long, there should be plenty of time for the prefetch queue to fill after each instruction, even after DRAM refresh has taken its slice of memory access time. They must be constructed and destroyed, which takes both time and code.

I made do with the articles I could dig up. In this pursuit, it can be useful to examine the code your compiler generates, either by viewing the code in a debugger or by having the compiler generate an assembly language output file.