Questions tagged [register]

A register is an information store, similar to a memory address.

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Is it possible to read and write to the uC registers via UART

I wonder if the microcontroller register can be accessed(R/W) via UART , given that the controller has a UART interface. I've been searching for a while but didn't find any examples. Looks like it's ...
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How to register COM dll successfully?

I use RegAsm.exe (Administrator mode)register the COM library, cmd: 'RegAsm.exe xxx.dll /tlb:xxx.tlb /codebase', the following is the cmd message: RegAsm : warning RA0000 : Registering an unsigned ...
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Dnscahe service has been vanish

I have been disable Dnscahe for some test reason The way I did that is by registry, now I want to get back think to normal I set the default setting: The first one (default) there was no value "as I ...
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Addresing registers of device

This is my first experience with the modbus protocol. I decided to connect the control panel of my chilling device with my PC. I connected them with USR TCP232-410s device (control panel – RS485 then ...
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1answer
63 views

Edit register without administrator permission

I need to do an ADO query from Excel using ADODB.Connection with several types of data. The problem is that in some cases some of the result's recordset have the values empty or numerical. As this ...
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Is there any app that show to me CPU informations? [closed]

I would like to understand from some PCs I have which kind of CPU details it got, such as how many register (XMM? 16?), which and how cache, speed, and so on. Is there such an application? Or for ...
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2answers
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What are the relations between IO ports and registers in a device controller? [closed]

Do the following two references give different claims on the relations between IO ports and registers in a device controller? What are their relations actually? Does the following quote from https://...
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Run 2 applications on startup without runnning the explorer

I'm fairley new to this. I would like to run two applications on windows 10 once it starts up but without running the explorer or any other application. I have tried using HKEY_LOCAL_MACHINE\SOFTWARE\...
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Where does CPU store instruction after decoding?

Control unit in CPU decodes the instruction held in IR (Instruction Register) but where does, if anywhere, CPU store instruction after it has been decoded?
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865 views

Difference between Memory Buffer Register and Program Counter

I am confused by the difference between the CPU memory buffer register and the program counter. The MBR holds contents and instructions from memory. The program counter stores the next instruction to ...
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224 views

Why adding 4 “zero” bits (0000) to the end of the segment register address to get segment address in physical memory? [closed]

Why, do we have to find an address in memory in which there is 20 bits free space which have 16 bits for segment register and 4 "Zero" bits? Like, if the CS register is 346AH, the code segment in ...
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How to set PCI registers

What program can I use to set PCI configuration registers from Windows 10? I have tried using setpci and BAR-edit, but when I try to write to the registers, it has no effect; when I try to read back ...
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how to store more variables in registers with limited number of cpu registers

In an interview i was asked a question whether we can store 5 variables in the cpu registers if the processor has only 4 cpu registers. I confidently gave answer NO, then the interviewer gave me some ...
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314 views

which one of these units is not located in the microprocessor?

I'm doing a test on general computer science and I think the answer sheet is wrong. The question is as follows: which one of these units is not located in the microprocessor? 1) Cache memory ...
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1answer
63 views

What is this logic component?

This is from http://www.cis.upenn.edu/~milom/cse240-Fall05/handouts/Ch05.pdf , slide 9. From this diagram, I recognize 0001 as the opcode or ADD. I recognize 011, or 3, as the source register and 101,...
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444 views

Byte addressable memory and ISA [closed]

I am trying to clear some confusion regarding instruction set architecture and how memory is accessed. Basically I know that in byte addressable memory, data is stored byte by byte either in big-...
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What is the difference between “Memory address” and “Program counter” registers?

What is the difference between "Memory address" and "Program counter" in CPU registers?
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Does data go from primary memory to CPU register directly without going to cache memory? [closed]

Does data go from the primary memory to CPU registers directly, when the CPU fetches data from the primary memory? Or data has to go from the primary memory to the cache memory first, before going to ...
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What's the difference between a hardware register and a memory-mapped register?

This has been puzzling, so I'll lay it all out here. Apparently, through MMIO, you can access external devices using a certain memory-mapped address, which would then be re-routed to that device ...
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1answer
213 views

When a thread is created, how is the initial context determined? [closed]

How is a thread's initial context (registers state) determined on thread creation? For example: Current thread context eax=0x4, ebx=0x9000, ecx=0xfff, etc... Create a thread is called to begin ...
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“Processor register” and “IO register”

I was wondering if processor registers and IO registers are the same concept? Are they registers in CPU or in some IO devices? I picked up IO registers from this Super User question.
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1answer
131 views

How to see registers in OSX

What program is there in OSX that lets you see the status of registers?
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4answers
2k views

Running programs in cache and registers

In my operating systems class we were shown a picture depicting a hierarchy of memory starting from most expensive and fastest at the top and least expensive and slowest at the bottom. At the very top ...
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Are IRQs registers?

When a device is assigned an IRQ, does that mean that it has sole access to certain registers associated with that IRQ?