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Lec 2 System Board (system board parts (Power supply converts AC/DC into…
Lec 2 System Board
system board parts
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CPU does math, logic, data movement and loops
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boot alogirthm
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- check if user wants to see CMOS/BIOS menu
- validate imp. ext. dvices
- find OS on hard drive and launch
commun. paths
purpose: to interconnect components. some need CPU, some parallel to it
formation: multiple wires of 1 bit, each wire carries signals independent of other | one byte through 8-parallel wires per tick of the clock
variety: system bus, data bus - b/w CPU & RAM, CPU bus, connector wires
optimization
cache - fast expensive RAM | strategy - auto-load cache | CPU connected to cache and PCI for higher perf.
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Timing
Bus Clock - byte movement, for gated access to the bus, and regulates data movement on motherboard
CPU Clock - within CPU chip - word movement, inst. execution, influence not beyond chip.
cards
contains chip as controller, used to connect system board with external devices
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