“Understanding Computers” Intro to GIS Fall 2004.
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Transcript of “Understanding Computers” Intro to GIS Fall 2004.
“Understanding Computers”
Intro to GIS
Fall 2004
Tools of the Trade
• Right tool for the Right job
• What’s inside the box?
• How do they do what they do?
• Aren’t all computers (PC’s) the same?
• Why won’t my programs do what they are supposed to do?
• What is a “Network”?
Tools of the Trade Cont’d.• Operating Systems• Drivers• Components
– CPU’s (Processors)• CISC• RISC• FPGA
– Hard Drives (configurations)– Motherboards (configurations)
• BUS Speeds– RAM (Random Access Memory)
• RAMBUS• DDR• SIMMS DIMMS DRAM SDRAM & EIEIO
– Video Cards• AGP• PCI Express• Video RAM
Operating Systems
• Windows
• MacOS
• Unix
• Linux
• IBM OS2
Operating Systems Cont’d.
• Windows– DOS– 3.11– 95– 98– Me– NT4 – XP– 2000
Operating Systems Cont’d.
• MacOS
– Apple/ II / llE / Mac / G3 / G4 / Ipod
• OS1 – OS9
• OSX (Jaguar)
Ultimately will integrate with some flavor of Unix
Operating Systems Cont’d
• Unix– Berkeley– Solaris– X Windows– Gave rise to Linux
Operating Systems
• Linux
– 1st Open source OS
– Created by Linus Torvold
– Developed by Users
– Number 1 OS used by Servers as of 2002
– Free OS
– Multiple flavors
• SuSe
• Red Hat
• Mandrake
• Others
Drivers
• Drivers are executable programs that contain the operating instructions for that particular component.
• Drivers are usually updated to reflect either new OS’s or some innovation in the hardware.
• Note * The newest driver is not always the best
• Drivers will often have the extension .dll (dynamic link library), older drivers may have the extension .drv
CPU’s
• CISC
– Complex Instruction Set Chip
– Intel / AMD Processors / Silicon Graphics (SGI)
• RISC
– Reduced Instruction Set Chip
– Motorola / Mac / Sun Microsystems / Silicon Graphics (SGI)
– Transmeta Carusoe
• FPGA
– Fully Programmable Gated Array
CPU’s
• Speed
– Clock cycles measured in Hertz
– 1 Hz = 1 clock cycle
– 1 kHz = 1000 clock cycles (Kilo) (thousand)
– 1 MHz = 1,000,000 clock cycles (Mega) (million)
– 1 GHz = 1,000,000,000 clock cycles (Giga) (billion)
– 1 THz = 1,000,000,000,000 clock cycles (Terra) (trillion)
– 1 PHz = 1,000,000,000,000,000 clock cycles (Pieta) (quadrillion)
Fastest computer “today” built by NEC for Japan 37 TFLOPS (Terra FLOPS) (FLOPS=floating operations per second=cycle)
CPU’s
• Chipsets
– Configuration of CPU
– Will tell you what type of RAM/Motherboards the CPU is compatible with
• Intel 845E vs. Intel 850PG
• Athlon vs. Duron
• Celeron vs. Pentium
• P4 vs. Xeon
• Opteron vs. FX 51/53
Hard Drives
• 4 Factors to consider– Classification
• DMA / UDMA / ATA / SCSI
– Size• Bit Vs. Byte
– 8 bits = 1 byte
– Binary = base2
– Working drives
– Total Drive Space
– Speed• Bus Speed (data transfer rate listed in MHz)• Spin Rate (listed in rpm’s)
– Configuration (multiple HD’s)• RAID - Redundant Array of Independent (or Inexpensive) Disks• Various configurations
Motherboards
• Various Makes and Models• BIOS / ROM / PROM / EPROM• Must be compatible with CPU Type and RAM Type• Various Slots
– ISA– PCI– AGP– AGM– USB 1, 2– IEEE1394 Firewire– PS/2– EIDE BUS Connections– RAM Pin configurations– CPU Slot configurations– Onboard Sound– Onboard Network Interface– RAID connectors
RAM (Random Access Memory)
• Simms (Single Inline Memory Modules)
• Dimms (Dual Inline Memory Modules)
• RDRAM (RAMBUS)
– PC400 / PC800 / PC1036
– Only for Intel chipsets
– Very Expensive (price has come down)
• DDR (Double Data Rate)
– DDR133 / DDR266 / DDR333 / DDR400
– Started as an inexpensive alternative to RAMBUS
– Was exclusively AMD however, now there are specific Intel chipsets that will allow the use of DDR RAM
Video Cards
• AGP – 1X / 2X / 4X / 8X/PCI Express 16x
• Video Memory (video RAM)– DDR– Onboard processors– Bandwidth / Throughput– 16bit / 32bit/ 64bit /128bit / 256bit – Compatibility with Intended software Use– Most Important Decision when building a Workstation
Various Video Card Manufacturers
Nvida / Radeon / 3dLabs / Cheap Cheesy Crap!
Tools of the Trade Cont’d.
• Slots
– ISA
– PCI / PCI32 / PCIX
– AGP 4x / 8x
• Cooling Systems
• Power Supply
• NIC Cards
Tools of the Trade Cont’d.
• Peripherals
– Monitors• Size• Resolution
– Printers/Plotters
– Keyboards• Ergo?• Hotkeys
– Mice• Trackballs• Castrated Mouse
Tools of the Trade Cont’d
• Care and Feeding of the Computer
– Cleaning
– Location
– Maintenance