Chapter 6 expansion slots

Chapter 6 expansion slots - a. I/O Mode i. all devices on...

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Chapter 6 – Expansion Bus I. Expansion bus Crystal a. Controlled the expansion cards b. Ran at a slower speed than the system crystal II. PC Bus a. 8-bits wide b. 7MHz c. Manual Configuration III. PCI-express a. Uses 1 wire for sending and 1 for receiving b. Each pair is called a lane IV. System Resources a. I/O address: How the CPU sends commands to devices b. IRQ: How devices tell the CPU they need communication c. DMA: How the CPU enables devices to talk directly to RAM d. Memory : How the CPU talks to RAM on devices V. I/O Addressing
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Unformatted text preview: a. I/O Mode i. all devices on the bus look for patterns of ones and zeroes to appear on the address bus b. Every device on PC has an I/O address c. Configured Automatically plug n play d. No two devices can have the same I/O address VI. I/O Advance Programmable Interrupt Controller (IOAPIC) a. Traffic cop for INT request b. uses special interrupt wires c. run to all devices on the expansion bus VII. DMA Controller a. 8237 b. Controls all DMA functions...
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Chapter 6 expansion slots - a. I/O Mode i. all devices on...

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