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Chapter 1: Overview The GBA processor is a Nintendo-customized CPU. Many people call it ARM7TDMI, which is also true. However, the arm7tbit is only a core and there are many other things on this chip. Another interesting thing is that arm didn't make the chip, but he authorized the design. But in general (we don't care;), there is a 32-bit ARM7TDMI in GBA. This CPU has two instruction sets: arm and thumb.
Fortunately, the GBA processor has some multiplication commands. They are Mul, MLA, umull, umlal, smull, and smlal. These commands can use s to specify whether to affect the status mark. In addition, these commands can only use registers as the operands without any displacement. The command Mul is the most basic. It performs a 32-bit multiplication in the following format: Mul DEST, OP1, OP2 @ DEST = OP1 * OP2. The result may be larger th
Sorry, I haven't updated it for too long. Please wait. Some private matters have occurred recently, and many homework have been delayed. I have temporarily stopped porting the gbasimulator because I cannot solve some technical problems for the time being. Therefore, according to the suggestions of the e680 group, I first transplanted the SFC simulator and got familiar with the environment, then, migrate the code to GBA. As long as you get used to it,
recently in the study of the knowledge of the brush machine, after watching some tutorials on the net, the understanding of the brush machine or just stay in so mechanical steps, always feel so superficial understanding really bad! So small series to find the following this article, their own study under, really good (well, small is a novice, I hope that Daniel with small series X with small series of flying ... ) and share it to everyone.This period of time to brush a bunch of
Label: Rom Assistant With the mushroom Rom assistant, it turns out to be so simple as a huge God. With the mushroom Rom assistant, you are not just a rom expert. This is a sentence I saw in my post on Dai Zi in Zhongguancun, with deep feelings. The shocking release of the mushroom
is better: Recoveryzip is simpler. Just put update.zip in the directory of the SD card, and then enter the rediscovery mode alt-S. But like any silly thing, his flexibility is very small, even if an error occurs, you do not know how to solve it. Generally, in order to ensure the reliability of the RoM, some installation environments will be determined in the installation program, and the mobile phone environment will be ever-changing,
With the development of smartphones, whether it is to look at mobile phone configuration or often in life and the network often hear people talk about some words. For example, mobile phone ram how much or ROM how many and so on. It may be known that the bigger the ROM or RAM, the better, but what the meaning of ROM and ram is and the difference between the two is
This article Reprinted from http://chenyq2008.spaces.live.com/blog/Both are file system drivers. Can read the ROM file system. The difference is: in addition to being able to read ROM disks, the former also constructs a ramdisk. (Because file system is very confusing, I call it ROM disk and ramdisk ).This article Reprinted from http://chenyq2008.spaces.live.com/b
What do you mean by ROM? The literal meaning is read only memory, read-only memory, the Android system is installed in the flash, this flash, is a read-only memory, power failure in the contents will not disappear, brush machine, is the brush ROM, ROM is like a computer installed system when the required installation disk, The brush machine is the
There are two ways to create an android ROM: The method for compiling Android source code is complicated and will be introduced later; Create or customize the ROM based on the existing Rom. This document describes how to customize a rom. The machine I used here is Nexus One, so I downloaded a third-party
Andro brush into ROM package method flow: First, the identification of the ROM package is a card brush or a wire brush bag Want to brush the first of course is to download a ROM package, then we should find out before downloading the brush bag is a wire brush or card brush package. Generally in the download when the author will be labeled
A friend asked why the CD-ROM disc will appear card dead phenomenon, in fact, did not panic, just because of the poor quality of the CD-ROM or optical drive laser aging caused by. When the optical drive to read some of the optical disk is not clear areas, the need to repeat the attempt to adjust the position of the bald head and power to read the data, this time the CD-
How to install Windows 7 without a CD-Rom and Windows 7 with a CD-Rom Currently, no optical drive is available in computer systems. Therefore, if a system problem occurs, you cannot install the system using a traditional optical drive .?? ? Since the system cannot be installed with a CD, we can only consider other ways. At present, the USB flash drive or memory card installation system is the best choice
Starting point:Traditional game simulators (FC, Neo, FBA, GBA, Mame, n64, NDS, and PSP) are all moved to Android phones, the game Rom is then saved to the SD card and run through the simulator. However, considering that mobile games must follow the fast forward and fast forward principles, I have implemented the following micro-innovations on this basis: 1. directly put the game
Desire HD Mobile Early on Root, the former is also S-off become the engineering version of Hboot (ENG S-off), want to brush a friend must often hear people mention clockworkmod recovery, then it is installed ClockworkMod Recove Ry! There are two ways to flash clockworkmod recovery, the other is to use the ROM Manager or command mode, when you kick a passer-by to introduce the ROM manager to install, after t
Extended ROM Base register If you need to embed an extension ROM (Oprom) in the feature card, the PCI register must be implemented. Many PCI features are embedded in the device ROM, which contains the device drivers for that feature. The start memory address and size of the extension ROM are defined in the extension
about Mobile ROM production of the topic, I believe we listen to a lot of personality ROM package Let us see the dazzling, there will always be some friends ask you, recently used by which the great God's ROM ? But you know, these great gods make rom package, not just interest, the production of character
Semiconductor memory is widely used in various computing devices such as computers. Compared with hard disk, floppy disk, tape, and other magnetic memory, CD, VCD, DVD, and PD optical memory, and MD magnetic/Optical Memory, semiconductor memory has obvious advantages: fast speed and small size, durable. However, the cost of semiconductor memory is relatively high, and the capacity is not large. Rom and ram refer to semiconductor memory. The original m
My Opinion on the hammer Rom Function Summary: The theme of Oracle's hammer press conference is:How to design a cowXSystem? The entire speech is divided into three parts:Visual, functional, and humanized; Today, I do not comment on Lao Luo or the influence table of hammer Rom. As a mobile phone controller (I am a computer sophomore, betterCodeWriting and functional design, as well as Persona
first, the CD-ROM common troubleshooting methods Common Failure One: the optical drive work when the hard drive lights always flashing Fault reason: This is an illusion, in fact it is not so. The hard drive light is blinking because the optical drive is connected to the hard drive on an IDE interface, and the disc also controls the results of the hard drive light when it works. The CD-ROM unit can be co
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