Hardware Secrets
Home | Camera | Case | CE | Cooling | CPU | Input | Memory | Mobile | Motherboard | Networking | Power | Storage | Video | Other
First Look
Gabriel’s Blog
Main Menu
About Us
Awarded Products
Manufacturer Finder
RSS Feed
Test Your Skills
Subscribe today!
Home » Dictionary » Bus

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Numeric

Author: Gabriel Torres Last Updated: January 10, 2006
Category: Bus

Industry Standard Architecture

ISA was the first motherboard slot type used on PCs, created in 1981 by IBM and updated in 1984 to 16 bits (before it was a 8-bit slot) when PC AT was released.

There is no problem installing 8-bit peripheral boards on 16-bit ISA slots. Some motherboards (as the one shown on Figure 1) have both 8-bit and 16-bit ISA slots. Very old (and huge) 8-bit ISA cards that, because of their layout, didn’t fit 16-bit ISA slots used these 8-bit ISA slots.

Usually when we refer to ISA slot we are talking about the 16-bit version. This model operated at 8 MHz and had a maximum theoretical transfer rate of 8 MB/s, which is a very low transfer rate for performance-demanding applications such as video, disk and networking.

ISA slots were used for many years specially because peripherals like sound cards, printers and scanners are very slot and didn’t need a bus faster than ISA. Applications like video, disk and networking were migrated to faster slot types, like PCI and AGP (and EISA and VLB during a short period of time), until ISA was completely gone.

click to enlarge
Figure 1: ISA slots.

Related Terms:

Related Links:

Print Version | Send to Friend | Bookmark this Term

There are 369 terms in our database.

RSSLatest Content
Zalman ZM-T3 Case Review
May 28, 2015 - 3:00 AM
ASUS H81M-A Motherboard
May 27, 2015 - 4:31 PM
ASRock FM2A88X-ITX+ Motherboard
April 27, 2015 - 2:40 AM
GeForce GTX TITAN X Video Card Review
April 22, 2015 - 4:00 AM
A10-7800 CPU Review
April 6, 2015 - 2:50 AM
Samsung Galaxy A5 Smartphone Review
March 31, 2015 - 2:47 AM

2004-15 Clube do Hardware, all rights reserved.
Advertising | Legal Information | Privacy Policy
All times are Pacific Standard Time (PST, GMT -08:00)