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Expansion Bus Quiz 1

Expansion Bus Quiz 1. You will need: One text per person Paper A pen(cil) Note: add info from this url to presentation: http://www.karbosguide.com/hardware/module5a4.htm. Procedures. Answer the question the best you can on the left side of your paper.

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Expansion Bus Quiz 1

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  1. Expansion Bus Quiz 1 You will need: One text per person Paper A pen(cil) Note: add info from this url to presentation: http://www.karbosguide.com/hardware/module5a4.htm

  2. Procedures • Answer the question the best you can on the left side of your paper. • When the answers are exposed, write down the correct answer • If your answer is correct you do not need to write anything • Full participation = A

  3. Sixteen-Bit ISA • Compare slots A and B: • What is the physical difference between these bus slots? • What is the electronic difference? • Each slot has two names. What are they?

  4. Sixteen-Bit ISA Answers • B slots have an extension. A does not • A is an 8 bit slot and B is a 16 bit slot. • A = PC/XT (8 bit ISA) & B = PC/AT (16 bit ISA)

  5. System Resources Define the following terms: • Com Port • Parallel Port • I/O Addressing

  6. System Resources Answers • Com Port: A preset combination of I/O address and IRQ designed for use with devices, which used serial communication (see p. 217, Table 6-4). • Parallel Port: A preset combination of I/O address and IRQ designed for use with devices which used parallel communication (see p. 217, Table 6-4) • I/O Addressing: The process where the CPU uses the address bus to talk to devices (p. 208, para 1).

  7. System Resources (cont.) • What four things do expansion cards use to communicate with the CPU and get its attention? • If everything is connected to the EDB and Address Bus how does the CPU and devices communicate with each other? • What is this method of CPU/Memory/Device communication called?

  8. System Resources (cont.)Answers • What four things do expansion cards use to communicate with the CPU and get its attention? • I/O addresses, IRQs, DMA channels, & memory addresses (Now set automatically) • If everything is connected to the EDB and Address Bus how does the CPU and devices communicate with each other? • By using the IO/Mem wire to switch from memory to device addressing (IO/Mem wire no longer used but process is same) • What is this method of CPU/Memory/Device communication called? • I/O Addressing

  9. The Rules of I/O Addresses • List the 3 rules for I/O Addresses?

  10. The Rules of I/O Addresses • List the 3 rules for I/O Addresses? • All devices have I/O addresses • Most devices use more than one address • No two devices can use the same I/O address

  11. Interrupt Requests • Describe the IRQ • List the 2 Rules of IRQs:

  12. Interrupt Requests • IRQ: • A way for devices on the bus to get the CPU’s attention • List the 2 Rules of IRQs: • Most devices need an IRQ • Usually no two devices shared an IRQ

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