Wednesday, January 27, 2010

ISA EXPANSION SLOT




What is a ISA Expansion slot


ISA stands for Industry standard Architecture. ISA bus was developed by a team lead by mark dean at IBM as part of IBM PC project in 1981. It originated as an 8 bit system and was extended in 1983 for the XT system architecture. The newer 16-bit standard IBM at bus was introduced in 1984. In 1988, THe Gang of Nine IBM PC compatible manufacturer put forth the 32-bit EISA standard and in the process retroactively renamed the AT bus to "ISA" to avoid infringing IBM's trademark on its pc/AT computer. ISA slots are an older type of expansion slot, twice as big as pcI slots and slower than pcI slotsas well. ISA slots are usually black, while PCI slots are usually white ISA slots are not used much anymore, but most computers still have at least one of them. ISA networking cards ISA sound cards, ISA video cards, and other types of ISA expansion cards can be used in the ISA slots. ISA expansion slots lets you plug data acquisition boards into PC's.


Whats the purpose of ISA Expansion Slot


The ISA slot is a slot inside your desktop computer that allow you to add hardware(internally) you will open the lid of your pc and insert the ISA card into the ISA slot.






Thursday, January 14, 2010

changing the setting for Multiple monitors

Another exercise 3.2 in my book explains how I can changed the settings for Multiple monitors. A multimonitor allows you to use two monitors on the computer at the same time. According to my book A+ complete study if a person were to give a presentation and would like to have a presenters view on their laptop LCD but need to project slideshow onto a screen, you might need to connect an external projector to the laptop. I found this exercise rather interesting, and these are the step that I went through to changing the settings to Multiple Monitors. You know at exercise 3.1 were we had to click on display setting links and we click on the advanced setting button there were two monitor icons 1 and 2 well you click on 2, check the extend the desktop onto this monitor box, click and drag the second monitor to what ever position that you want around the primary monitor, and finally while the second monitor is still selected, change the refresh rate and resolution. Thats how you change the settings for multiple monitors.

changing the refresh Rate in windows vista

in my computer architecture class were supposed work on exercise 3.1 changing the Refresh Rate in windows vista. Refresh rate is the number of times a display image is repainted or refreshed per second. the refresh rate is expressed in hertz. a refresh rate of 75 hz means the image is refreshed 75 times in one second. these were some of the steps that I had to go throw to change the refresh rate in window vista this is different in window xp. 1.) Right-click a blank portion of the desktop. 2) click personalize 3.) there should be a big screen that says personal appearances and sounds with a list of icons click on the display setting link. 4.) click on the advanced setting button there should be a picture of two icons with 1 and a 2. 5.) click monitor tab you have a choice of picking 60 hertz or 70 hertz what ever you prefer and thats how you changed the refresh rate using windows vista. According to my text book A+ computer study guide it says just because refresh rates appear in this dialog box does not mean that the associated monitor will be able to handle that rate.

What is a computer?




A computer is an digital electronic device that combine hardware and software to accept input of data it process and store the data, to produce output. Some of the basic components that you need to build a computer are: motherboard, processor, powersupply, case, hard drive, operating system, cd/dvd rom drive, video card, RAM