ISA -Industry Systems Architecture

8 MHZ,

Designed for use in IBM XT, uses 8 and 16 bit, do not support other card types. (ISA cards can be plugged into ISA, EISA or VLBUS)  config done by setting jumpers

EISA - Entended Industry Systems Architecture

8 MHZ

Backward compatible with ISA. ISA cards will work in EISA slots. Supports 16 and 32 bit transfer.config. By software or jumpers

MCA - Microchannel Architecture

10 MHZ

Designed by IBM, self configuring, supports 16 and 32 bit, do not support other card types, abondoned by IBM. Config by software

PCI - Peripheral Component Interconnect

33 MHZ

Supports 32 and 64 bit transfers, busmastering, and "plug and play."

VLB - Vesa Local Bus

Operates at same speeds as CPU

Supports 16, 32, and 64 bit transfers, backward compatible with ISA cards, Confid done by jumpers; often used video cards

AGP

Operates at speed of processor

Used in video cards

PCMCIA - Personal Computer Memory Card Industry Association

33 MHZ

Designed for portables, supports "plug and play." 16-bit

IRQ 0

System Timer

IRQ 1

Keyboard

IRQ 2(9)

Video Card or cascade to IRQ 9

IRQ 3

Com2, Com4

IRQ 4

Com1, Com3

IRQ 5

Available (Normally LPT2 or sound card )

IRQ 6

Floppy Disk Controller

IRQ 7

Parallel Port (LPT1)

IRQ 8

Real-time clock

IRQ 9

Redirected IRQ2

IRQ 10

Available

IRQ 11

Available

IRQ 12

PS/2 Mouse

IRQ 13

Math Coprocessor

IRQ 14

Hard Disk Controller

IRQ 15

Available (often used for second Hard Disk Controller)

COM1

3F8H

COM2

2F8H

COM3

3E8H

COM4

2E8H

LPT1

378H

LPT2

278H

Hardware Topics: Basic PC Overview
Preventative Maintenance and Safety -|- Basic Troubleshooting -|- PC Architecture Basics -|- PC I/O and Busses
Processors -|- Memory -|- Drives -|- Monitors and Video -|- Modems -|- Printers -|- Portable Systems -|- Networking

Operating System Topics:
DOS basics -|- Windows 3.1 -|- OS Memory Management -|- Installation of DOS and Windows 3.x
Installation of Windows 9X -|- Diagnosis and Troubleshooting -|- Windows 95 Overview -|- Windows 95 Networking
Windows 95 vs Windows NT

Support this website by checking out our offers ...
Compare Our Domain Names Prices and Save!

Support this website, by using thus ling to find all your tech book needs:
Check out our recently updated recommended reading list.

Please Read -DISCLAIMER: Technology changes very rapidly. The information presented here was believed to be accurate at the time it was gathered. No claim is made that this information is up to date, or that it represents the current technology used today.

Welcome to the World of Questy

Welcome to the World of Questy -- The World of Questy Sites are currrently undergoing a major overhaul. Stay tuned for updated links and news in 2008!

Unless otherwise credited all photos and graphics are the copyrighted property of Questy aka Tom Peracchio. Unauthorized reproduction of any of the pages of this web site is illegal, not to mention rude.
- Copyright 1990 through 2008 -