CSCIO01-CO

Monday, September 17, 2007

Commonly chipset used for pentium 4/core 2

Summary:
-975X (Glenwood)
Update of 975, with support for ATI Crossfire Dual Graphics solutions and 65 nm processors, including Core 2 Duo.
-P965 (Broadwater)
Update on 945P, no native PATA support, improved memory controller with support for DDR-II at 800MHz and formal Core 2 Duo support.
-G965 (BroadwaterG)
A version of P965 that has a GMA X3000 integrated graphics core.
-Q965 (Broadwater)
Expected G965 intended for Intel's vPro office computing brand, with GMA 3000 instead of GMA X3000. Supports an ADD2 card to add a second display.
Sub-versions:
-Q963 - Q965 without an external graphics interface or support for ADD2.
-P35 (Bearlake)
The P35 chipset will provide updated support for the new Core 2 Duo E6550, E6750, E6800, and -E6850. Processors with a number ending in "50" will have a 1333 MT/s FSB.
-G33 (BearlakeG)
A version of P35 with a GMA 3100 integrated graphics core.

-915P (Grantsdale)
Supports Pentium 4 on an 800 MHz bus. Uses DDR memory up to 400 MHz, or DDR-II at 533 MHz. Replaces AGP and CSA with PCI Express, and also supports "Matrix RAID", a RAID mode designed to allow the usage of RAID levels 0 and 1 simultaneously with two hard drives. (Normally RAID1+0 would have required four hard drives)
Sub-versions:
-915PL - Cut-down version of 915P with no support for DDR-II and only supporting 2GB of memory.
-915G (Grantsdale-G)
-915P with an integrated graphics core GMA 900. The core is compliant with Vertex and Pixel shader versions 2.0, and has similar functionality to GeForce FX 5200 64bit and Radeon 9100 IGP, though it does not have Transform & Lighting (T&L) features.
Sub-versions:
-915GL - Same feature reductions as 915PL, but supports 4GB of memory. No support for external graphics cards.
-915GV - Same as 915G, but has no way of adding an external graphics card.
-910GL - No support for external graphics cards or 800 MHz bus.
-925X (Alderwood)
Higher end version of 915. Supports another PAT-like mode and ECC memory, and exclusively uses DDR-II RAM.
Sub-versions:
-925XE - Supports a 1066 MHz bus.
-945P (Lakeport)
Update on 915P, with support for Serial ATA II, RAID mode 5, an improved memory controller with support for DDR-II at 667 MHz and additional PCI-Express lanes. Support for DDR-I is dropped. Formal dual-core support was added to this chipset.
Sub-versions:
-945PL - No support for 1066 MHz bus, only supports 2GB of memory.
-945G (Lakeport-G)
A version of the 945P that has a GMA 950 integrated graphics core, supports a 1066 MHz bus.
Sub-versions:
-945GZ - Same feature reductions as 945PL but with an integrated graphics core. No support for external graphics cards.
-955X (Glenwood)
Update for 925X, with additional features of "Lakeport" eg. PAT features and ECC memory, and uses DDR2.

Monday, August 27, 2007

Prefinal Exercise # 2

Memory chip

- a chip that holds programs and data either temporarily (RAM), permanently (ROM, PROM) or permanently until changed (EPROM, EEPROM, flash memory). See memory types and memory module.

RAM chips

(Random Access Memory) A group of memory chips, typically of the dynamic RAM (DRAM) type, which function as the computer's primary workspace. When personal computers first came on the market in the late 1970s, 64KB (64 kilobytes) of RAM was the upper limit. Today, 64MB (64 megabytes) of SDRAM is entry level for a desktop computer, a thousand times as much (see SDRAM).Random Access Means Direct AccessThe "random" in RAM means that the contents of each byte of storage in the chip can be directly accessed without regard to the bytes before or after it. This is also true of other types of memory chips, including ROMs and PROMs. However, unlike ROMs and PROMs, RAM chips require power to maintain their content, which is why you must save your data onto disk before you turn the computer off. To learn about the types of RAM chips and how to upgrade your memory, see memory module. To learn how memory is used to process data, see computer or memory. See also dynamic RAM and static RAM.

ROM chips

(Read Only Memory) A memory chip that permanently stores instructions and data. Also known as "mask ROM," its content is created in the last masking stage of the chip manufacturing process, and it cannot be changed. Stand-alone ROM chips and ROM banks in microcontroller chips are used to hold control routines for a myriad of applications. ROMs were also widely used to hold the BIOS in early PCs as well as plug-in cartridges for video games.Although EPROMs, EEPROMs, and particularly flash memory, are the kinds of non-volatile storage one hears about more often, ROM technology is mature, inexpensive and easy to integrate into any CMOS chip. See memory types, RAM, EEPROM and flash memory.

PROM (Programmable ROM) A permanent memory chip in which the content is created (programmed) by the customer rather than by the chip manufacturer. It differs from a ROM chip, which is created at the time of manufacture. PROMs are used for storage when their content is not expected to change, but in many applications, they have given way to EPROMs and EEPROMs, which can be reprogrammed.

EPROM (Erasable Programmable ROM) A rewritable memory chip that holds its content without power. EPROM chips are written on an external programming device before being placed on the circuit board. The chip requires an expensive ceramic package with a small quartz window that is covered with opaque, sticky tape. In order to reprogram an EPROM, the chip is extracted from the circuit board, the tape is removed, a

nd it is placed under an intense ultraviolet (UV) light for approximately 20 minutes.

EEPROM (Electrically Erasable Programmable ROM) A rewritable memory chip that holds its content without power. EEPROMs have a lifespan of between 10K and 100K write cycles, which is considerably greater than the E-PROMs that preceded them (in this definition only, a dash is inserted in EPROM for easier recognition between EPROM and EEPROM).

Ports an interface on a computer to which you can connect a device. Personal computers have various types of ports. Internally, there are several ports for connecting disk drives, display screens, and keyboards. Externally, personal computers have ports for connecting modems, printers, mice, and other peripheral devices.Almost all personal computers come with a serial RS-232C port or RS-422 port for connecting a modem or mouse and a parallel ports for connecting a printer. On PCs, the parallel port is a Centronics interface that uses a 25-pin connector. SCSI (Small Computer System Interface) ports support higher transmission speeds than do conventional ports and enable you to attach up to seven devices to the same port.

In TCP/IP and UDP networks, an endpoint to a logical connection. The port number identifies what type of port it is. For example, port 80 is used for HTTP traffic. Also see Well-Known TCP Port Numbers in the Quick Reference section of Webopedia.(v.) To move a program from one type of computer to another. To port an application, you need to rewrite sections that are machine dependent, and then recompile the program on the new computer. Programs that can be ported easily are said to be portable.

Kinds of Ports

The FreeBSD Ports and Packages Collection offers a simple way for users and administrators to install applications. There are currently 17547 ports available.The Ports Collection supports the latest release on the FreeBSD-CURRENT and FreeBSD-STABLE branches. Older releases are not supported and may or may not work correctly with an up-to-date ports collection. Over time, changes to the ports collection may rely on features that are not present in older releases. Wherever convenient, we try not to gratuitously break support for recent releases, but it is sometimes unavoidable. When this occurs, patches contributed by the user community to maintain support for older releases will usually be committed.

OpenBSD is a fairly complete system of its own, but still there is a lot of software that one might want to see added. However, there is the problem of where to draw the line as to what to include, as well as the occasional licensing and export restriction problems. As OpenBSD is supposed to be a small stand-alone UNIX-like operating system, some things just can't be shipped with the system.

TCP ports are used by the Transmission Control Protocol, which allows a server to conduct a conversation, or session, with another machine. When your computer wants to request a page from a Web server, it sends a packet to that machine indicating that it wants to talk to TCP port 80 (the well-known port through which most Web servers deliver pages). The server, seeing that you've asked for port 80, connects your computer to the Web server program, which—of the many programs running on the machine—is the one that specializes in delivering Web pages. The conversation between the machines may be brief or may continue indefinitely.UDP ports are used by the User Datagram Protocol, which lets machines send short messages to one another. Unlike TCP, UDP does not establish an ongoing conversation; each message stands alone.
Buses are common pathway between resources and devices. In a computer, there are two major types: the system bus and peripheral bus. The system bus, also known as the "frontside bus" or "local bus," is the internal path from the CPU to memory and is split into address bus and data bus subsets. Addresses are sent over the address lines to signal a memory location, and data are transferred over the data lines to that location.System buses transfer data in parallel. In a 32-bit bus, data are sent over 32 wires simultaneously. A 64-bit bus uses 64 wires.

Three main Buses Architecture

PCI (Peripheral Component Interconnect) The most widely used I/O bus (peripheral bus). Used in computers of all sizes, it provides a shared data path between the CPU and peripheral controllers, such as network, display, SCSI and RAID cards. However, with so many controller circuits built into the motherboard, the need for vacant PCI slots in a PC has diminished considerably.

AGP (Accelerated Graphics Port) A high-speed 32-bit port from Intel for attaching a display adapter to a PC. It provides a direct connection between the card and memory, and only one AGP slot is on the motherboard. AGP was introduced as a higher-speed alternative to PCI display adapters, and it freed a PCI slot for another peripheral device. The brown AGP slot is slightly shorter than the white PCI slot and is located about an inch farther back. AGP is superseded by PCI Express.

PCI Express a high-speed peripheral interconnect from Intel introduced in 2002. Note that although sometimes abbreviated "PCX," PCI Express is not the same as "PCI-X" (see PCI-SIG and PCI-X for comparison). As a result of the confusion, "PCI-E" or "PCIE" is the accepted abbreviation.Initially used for high-speed display adapters, and intending to eventually replace the PCI and AGP buses entirely, PCI Express was designed to match the higher speeds of today's CPUs. It can accommodate Gigabit and 10 Gigabit Ethernet and even support chip-to-chip transfers.

Monday, August 20, 2007

DIFF. FUNCTIONS & DESCRIPTIONS OF NETWORK TOPOLOGY

Network topology

-is the study of the arrangement or mapping of the elements (links, nodes, etc.) of a network, especially the physical (real) and logical (virtual) interconnections between nodes.
A local area network (LAN) is one example of a network that exhibits both a physical and a logical topology. Any given node in the LAN will have one or more links to one or more other nodes in the network and the mapping of these links and nodes onto a graph results in a geometrical shape that determines the physical topology of the network. Likewise, the mapping of the flow of data between the nodes in the network determines the logical topology of the network. It is important to note that the physical and logical topologies might be identical in any particular network but they also may be different.
Any particular network topology is determined only by the graphical mapping of the configuration of physical and/or logical connections between nodes - Network Topology is, therefore, technically a part of graph theory. Distances between nodes, physical interconnections, transmission rates, and/or signal types may differ in two networks and yet their topologies may be identical.
Basic Types of TopologiesThe arrangement or mapping of the elements of a network gives rise to certain basic topologies which may then be combined to form more complex topologies (hybrid topologies). The most common of these basic types of topologies are (refer to the illustration at the top right of this page):Bus (Linear, Linear Bus)StarRingMeshpartially connected mesh (or simply 'mesh')fully connected mesh (or simply fully connected)TreeHybrid
Classification of Physical Topologies:
Point-to-point:

The simplest topology is a permanent link between two endpoints. Switched point-to-point topologies are the basic model of conventional telephony. The value of a permanent point-to-point network is the value of guaranteed, or nearly so, communications between the two endpoints. The value of an on-demand point-to-point connection is proportional to the number of potential pairs of subscribers, and has been expressed as Metcalfe's Law.Permanent (dedicated):Easiest to understand, of the variations of point-to-point topology, is a point-to-point communications channel that appears, to the user, to be permanently associated with the two endpoints. Childrens' "tin-can telephone" is one example, with a microphone to a single public address speaker is another. These are examples of physical dedicated channels.Within many switched telecommunications systems, it is possible to establish a permanent circuit. One example might be a telephone in the lobby of a public building, which is programmed to ring only the number of a telephone dispatcher. "Nailing down" a switched connection saves the cost of running a physical circuit between the two points. The resources in such a connection can be released when no longer needed, as, for example, a television circuit from a parade route back to the studio.Switched:Using circuit-switching or packet-switching technologies, a point-to-point circuit can be set up dynamically, and dropped when no longer needed. This is the basic mode of conventional telephony.
Bus:Linear Bus:The type of network topology in which all of the nodes of the network are connected to a common transmission medium which has exactly two endpoints (this is the 'bus', which is also commonly referred to as the backbone, or trunk) – all data that is transmitted between nodes in the network is transmitted over this common transmission medium and is able to be received by all nodes in the network virtually simultaneously (disregarding propagation delays.Note: The two endpoints of the common transmission medium are normally terminated with a device called a terminator that exhibits the characteristic impedance of the transmission medium and which dissipates or absorbs the energy that remains in the signal to prevent the signal from being reflected or propagated back onto the transmission medium in the opposite direction, which would cause interference with and degradation of the signals on the transmission medium (See Electrical termination).Distributed Bus:The type of network topology in which all of the nodes of the network are connected to a common transmission medium which has more than two endpoints that are created by adding branches to the main section of the transmission medium – the physical distributed bus topology functions in exactly the same fashion as the physical linear bus topology (i.e., all nodes share a common transmission medium).
Star:

The type of network topology in which each of the nodes of the network is connected to a central node with a point-to-point link in a 'hub' and 'spoke' fashion, the central node being the 'hub' and the nodes that are attached to the central node being the 'spokes' (e.g., a collection of point-to-point links from the peripheral nodes that converge at a central node) – all data that is transmitted between nodes in the network is transmitted to this central node, which is usually some type of device that then retransmits the data to some or all of the other nodes in the network, although the central node may also be a simple common connection point (such as a 'punch-down' block) without any active device to repeat the signals.
Extended Star:A type of network topology in which a network that is based upon the physical star topology has one or more repeaters between the central node (the 'hub' of the star) and the peripheral or 'spoke' nodes, the repeaters being used to extend the maximum transmission distance of the point-to-point links between the central node and the peripheral nodes beyond that which is supported by the transmitter power of the central node or beyond that which is supported by the standard upon which the physical layer of the physical star network is based.Note: If the repeaters in a network that is based upon the physical extended star topology are replaced with hubs or switches, then a hybrid network topology is created that is referred to as a physical hierarchical star topology, although some texts make no distinction between the two topologies.
Distributed Star:A type of network topology that is composed of individual networks that are based upon the physical star topology connected together in a linear fashion – i.e., 'daisy-chained' – with no central or top level connection point (e.g., two or more 'stacked' hubs, along with their associated star connected nodes or 'spokes').
Ring:

The type of network topology in which each of the nodes of the network is connected to two other nodes in the network and with the first and last nodes being connected to each other, forming a ring – all data that is transmitted between nodes in the network travels from one node to the next node in a circular manner and the data generally flows in a single direction only.Dual-ring:The type of network topology in which each of the nodes of the network is connected to two other nodes in the network, with two connections to each of these nodes, and with the first and last nodes being connected to each other with two connections, forming a double ring – the data flows in opposite directions around the two rings, although, generally, only one of the rings carries data during normal operation, and the two rings are independent unless there is a failure or break in one of the rings, at which time the two rings are joined (by the stations on either side of the fault) to enable the flow of data to continue using a segment of the second ring to bypass the fault in the primary ring.
Mesh:

The value of fully meshed networks is proportional to the exponent of the number of subscribers, assuming that communicating groups of any two endpoints, up to and including all the endpoints, is approximated by Reed's Law.Full:Fully Connected:The type of network topology in which each of the nodes of the network is connected to each of the other nodes in the network with a point-to-point link – this makes it possible for data to be simultaneously transmitted from any single node to all of the other nodes.Note: The physical fully connected mesh topology is generally too costly and complex for practical networks, although the topology is used when there are only a small number of nodes to be interconnected.Partial:Partially Connected:The type of network topology in which some of the nodes of the network are connected to more than one other node in the network with a point-to-point link – this makes it possible to take advantage of some of the redundancy that is provided by a physical fully connected mesh topology without the expense and complexity required for a connection between every node in the network.Note: In most practical networks that are based upon the physical partially connected mesh topology, all of the data that is transmitted between nodes in the network takes the shortest path between nodes, except in the case of a failure or break in one of the links, in which case the data takes an alternate path to the destination – this implies that the nodes of the network possess some type of logical 'routing' algorithm to determine the correct path to use at any particular time.
Tree

(also known as Hierarchical):The type of network topology in which a central 'root' node (the top level of the hierarchy) is connected to one or more other nodes that are one level lower in the hierarchy (i.e., the second level) with a point-to-point link between each of the second level nodes and the top level central 'root' node, while each of the second level nodes that are connected to the top level central 'root' node will also have one or more other nodes that are one level lower in the hierarchy (i.e., the third level) connected to it, also with a point-to-point link, the top level central 'root' node being the only node that has no other node above it in the hierarchy – the hierarchy of the tree is symmetrical, each node in the network having a specific fixed number, f, of nodes connected to it at the next lower level in the hierarchy, the number, f, being referred to as the 'branching factor' of the hierarchical tree.
Hybrid Network Topologies

The hybrid topology is a type of network topology that is composed of one or more interconnections of two or more networks that are based upon different physical topologies or a type of network topology that is composed of one or more interconnections of two or more networks that are based upon the same physical topology, but where the physical topology of the network resulting from such an interconnection does not meet the definition of the original physical topology of the interconnected networks (e.g., the physical topology of a network that would result from an interconnection of two or more networks that are based upon the physical star topology might create a hybrid topology which resembles a mixture of the physical star and physical bus topologies or a mixture of the physical star and the physical tree topologies, depending upon how the individual networks are interconnected, while the physical topology of a network that would result from an interconnection of two or more networks that are based upon the physical distributed bus network retains the topology of a physical distributed bus network).

Friday, July 20, 2007

OUTPUT

This is a line.
This is another line.

Code Of C++

#include

using namespace std;

int main () {

ofstream myfile ("example.txt");

if (myfile.is_open())

{

myfile << "This is a line.\n";

myfile << "This is another line.\n";

myfile.close();

}

else cout << "Unable to open file";

return 0;

}

Autobiography

I'am Marjo C. Ampong. I live at Maa my mother's name is Mary Ampong my father's name is Jovito Ampong. I was born on july 17,1990 in Davao City. My Sisters name is Joymar Ampong. My Friends Call me Trexcy. I'am now in 1st year college student in AMA computer college and I'am taking BSCS. The Occupation of my father is Business man and my mother is working at the boystown fundation. I'am Nature Lover.

Monday, July 16, 2007

Exercise 3 Caption

Computer is a device that accepts information (in the form of digitalized data) and manipulates it for some result based on a program or sequence of instructions on how the data is to be processed. Complex computers also include the means for storing data (including the program, which is also a form of data) for some necessary duration. A program may be invariable and built into the computer (and called logic circuitry as it is on microprocessors) or different programs may be provided to the computer (loaded into its storage and then started by an administrator or user). Today's computers have both kinds of programming.

System unit the main body of a computer, consisting of a plastic or metal enclosure, the motherboard, and (typically) internal disk drives, a power supply, cooling fans, and whatever circuit boards plugged into the mother board, such as a video card. The system unit is occasionally referred to as the CPU, though this really means central processing unit.

Screen Monitor flat-screen computer monitors give off less radiation than nonflat-screen monitors.

Monitor usually called simply a monitor, is a piece of electrical equipment which displays viewable images generated by a computer without producing a permanent record. The word "monitor" is used in other contexts; in particular in television broadcasting, where a television picture is displayed to a high standard. A computer display device is usually either a cathode ray tube or some form of flat panel such as a TFT LCD display. The monitor comprises the display device, circuitry to generate a picture from electronic signals sent by the computer, and an enclosure or case. Within the computer, either as an integral part or a plugged-in interface, there is circuitry to convert internal data to a format compatible with a monitor.

Mouse is a small device that a computer user pushes across a desk surface in order to point to a place on a display screen and to select one or more actions to take from that position. A mouse consists of a metal or plastic housing or casing, a ball that sticks out of the bottom of the casing and is rolled on a flat surface, one or more buttons on the top of the casing, and a cable that connects the mouse to the computer. As the ball is moved over the surface in any direction, a sensor sends impulses to the computer that causes a mouse-responsive program to reposition a visible indicator (called a cursor) on the display screen. The positioning is relative to some variable starting place. Viewing the cursor's present position, the user readjusts the position by moving the mouse.

Speaker an electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance.

Computer printer or more commonly a printer, produces a hard copy (permanent human-readable text and/or graphics) of documents stored in electronic form, usually on physical print media such as paper or transparencies. Many printers are primarily used as computer peripherals, and are permanently attached by a printer cable to a computer which serves as a document source. Other printers, commonly known as network printers, have built-in network interfaces (typically wireless or Ethernet), and can serve as a hardcopy device for any user on the network.

Microphone, sometimes referred to as a mike or mic (both IPA pronunciation: is an acoustic to electric transducer or sensor that converts sound into an electrical signal.Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as ultrasonic checking.

Keyboard is the primary text input device. (The mouse is also a primary input device but lacks the ability to easily transmit textual information.) The keyboard also contains certain standard function keys, such as the Escape key, tab and cursor movement keys, shift and control keys, and sometimes other manufacturer-customized keys. uses the same key arrangement as the mechanical and electronic typewriter keyboards that preceded the computer. The standard arrangement of alphabetic keys is known as the Qwerty (pronounced KWEHR-tee) keyboard, its name deriving from the arrangement of the five keys at the upper left of the three rows of alphabetic keys.