Tag Archives: computer fundamentals

Using Linux Shells, Command entry and Terminal emulators.

Posted on May 1, 2016 by nigel borrington

Please note that this post follows on from : The Linux Shell Operating systems such as Linux and Microsoft windows owe their current existence to much earlier versions of themselves with ASCII-code Text based command lines as their only interface … Continue reading →

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I/O Addresses and I/O memory

Posted on April 28, 2016 by nigel borrington

Please note that this post follows on from : IRQ’s and Interrupts I/O Addresses and I/O memory relate to bi-directional Communications between (CPU/Computer to devices ) as opposed to IRQ’s/Interrupt’s which are one way (device to CPU/Computer) communications. Communication via … Continue reading →

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Device IRQ’s (interrupt requests) a Definition.

Posted on April 27, 2016 by nigel borrington

Definition of : IRQ (interrupt request) An IRQ (interrupt request) value is an assigned location in memory where the computer can expect a particular device to interrupt it when the device sends the computer signals about its operation. Note that … Continue reading →

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Hexadecimal file editors and viewers

Posted on June 25, 2015 by nigel borrington

In my last post I talked a little about the numeric base systems of (Binary, Octal, Hex-decimal and Decimal) relating them to both computer machine level instruction code and application data. However these mathematical concepts are a little hard to … Continue reading →

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Numeric base systems of (Binary, Octal, Hex-decimal and Decimal)

Posted on June 23, 2015 by nigel borrington

Computer related numeric systems and their written representation In My last post I talked a little about the way computers see both their pre-defined commands in the form of machine code instructions that are grouped into applications by a programmer. … Continue reading →

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