processor

There are many different types of traps listed in processor datasheets, e.g. BusFault, MemManage Fault, Usage Fault and Address Error. What is their purpose? How can they be utilized in fault handling? Traps are essentially subroutine calls that are forced by the processor when it detects something unusual in your stream of instructions. (Some processors make them into interrupts, but that's mostly just pushing more context onto the stack; this gets more interesting if the trap includes a switch between user and system address spaces). This is useful for handling conditions that occur rarely

I have a number of questions about Intel PT (have been trying to decode the manual but is very difficult). My questions are: I am trying to find out if Intel PT can be disabled or reconfigured from within an OS, or, more generally, from within the system it is providing a trace of. Does Intel PT generate events on writes to specific registers - such as CR3, IDTR, etc Can Intel PT write values back to the system - i.e. can an external debugging machine actively perform writes to register, cache or memory? Any help is much appreciated, thankyou!! I'm also currently figuring out how to use Intel

I'm learning to code on Xilinx (VHDL). Next, I want to make a simple microprocessor/microcontroller and on the way learn a little about slice components. So my goal is try to code an 8 bits microprocessor using an AMD 2901 (4 bits-slice). (I already have the code of the 2901 and all its information about its input and output signals.) I know the first step would be make the architecture of the microprocessor so I ended up with something like this (I understand that the bandwidth of the bus will be very different for what I'm looking for). http://www.cs.binghamton.edu/~reckert/wk15fig1.JPG

I want to get Processor Model similar to DU Booster. CPU model contains ARM processor version and revision. For Example: ARMv7 Processor rev 3 (v7l) I have tried this System.getProperty("os.arch") which returns only architecture and String[] args = {"/system/bin/cat", "/proc/cpuinfo"}; to get CPU info. I am able to get the right information in some of the devices but not in all. I tried this in Asus Fonepad 7 which doesn't return the property of the Processor(but returns processor(small p) It returns like processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 53 model name : Intel(R)

I don't know very well about RAM and HDD architecture, or how electronics deals with chunks of memory, but this always triggered my curiosity: Why did we choose to stop at 8 bits for the smallest element in a computer value ? My question may look very dumb, because the answer are obvious, but I'm not very sure... Is it because 2^3 allows it to fit perfectly when addressing memory ? Are electronics especially designed to store chunk of 8 bits ? If yes, why not use wider words ? It is because it divides 32, 64 and 128, so that processor words can be be given several of those words ? Is it just

I am reading some C text. In the Negative and Positive Values session, the author mentioned several ways of representing a negative number in binary form. I understood all of the way and was wondering if with a give binary number, can we determine if it is negative? For example, the -92 has the 8-bit binary form: 10100100 . But if we are given 10100100 can we say that is -92, and not other non-negative number? It depends on the representation, of course. In two's complement, which is widely used, you simply look at the most significant bit. For example, the (number) -92 has the binary form: