Specifications

Computer Architecture and Maintenance (G-Scheme-2014)
Quatech's first data communication adapters were designed for the PC/ XT, and
some of these are being used in older systems running extremely simple, low-speed
applications. However, the ISA bus has come a long way since 1981, and its modern
incarnation is much better suited to the PCs we use today and the applications we run
on them.
Features of ISA
• They are two capabilities that handle data: 8-bit ISA and ISA-16 bits.
• Are physically different expansion slots, the 8 bits is smaller than 16 bits.
• The 16-bit ISA slot also supports 8 bit ISA devices, but not vice versa.
• They have a transfer rate of up to 20 Mbytes / s (MB / s).
• They have a working internal speed of 4.77 MHz, 6 MHz, 8 MHz and 10 MHz
• It has a feature called "bus master" or bus-level control, which allows you to
work directly with the RAM.
• ISA could be considered an expansion slot of the second generation.
• This type of expansion slots generate a bottleneck having the higher speed
microprocessor.
Q. What is PCI Bus? List its Features?
Ans. The Peripheral Component Interconnect, or PCI Standard, specifies a computer
bus for attaching peripheral devices to a computer motherboard.
PCI is short for Peripheral Component Interconnect. The PCI slot is a local
system bus standard that was introduced by the Intel Corporation, however, it is not
exclusive to any form of processors and PCI slots are found in both Windows PCs and
Macs.
PCI slots allow numerous different types of expansion cards to be connected
inside a computer to extend the computers functionality. Examples of PCI expansion
cards are network cards, graphics cards and sound cards.
The PCI bus is a high speed bus that connects high-performance peripherals like
video adapters, disk adapters and network adapters to the chipset. processor and
memory.
Unlike previous buses that linked tightly the processor to the expansion bus slot,
the PCI bus electronically isolates the processor from the PCI expansion slots. This
allows more PCL slots to be supported and removes performance constraints on the
use of those slots.
Although the bus speed is slightly slower than PCI Express, the PCI slots are the
most common type of slot and found on most motherboards today. If you are installing
Prepared By – Prof. Manoj.kavedia (9860174297 – 9324258878 ) (www.kavediasir.yolasite.com)
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