Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| sound card or paralled port LPT2 |
|
Definition
|
|
Term
|
Definition
|
|
Term
| printer parallel port LPT1 |
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
|
Definition
|
|
Term
| secondary IDE hard drive or avialable |
|
Definition
|
|
Term
| what is the purpose of the purpse of the second IRQ controller? |
|
Definition
| second IRQ controller uses IRQ 2 to signal the first IRQ controller |
|
|
Term
|
Definition
| 0,1(8,9,10,11,12,13,14,15),3,4,5,6,7 |
|
|
Term
| what are the 4 system resources? |
|
Definition
IRQ's-interrupt requests
I/O Addresses
Direct Memory Access Channels (DMA)
Memory Addresses |
|
|
Term
|
Definition
initiated by a hardware device and signal the cpu that a device needs attention
-each irq line is assigned a number to identify it, and irqs are proccessed according to the priority of the device. |
|
|
Term
|
Definition
each device has a unique (hexadecimal) I/O address.
-software signals are broadcast and each device essentially "listens" for its unique address-when it hears the address it performs whatever action is requested |
|
|
Term
|
Definition
| direct memory access channels-devices to place some value directly in an assigned memory address or location without attention or action by the cpu.--output from video device to the monitor |
|
|
Term
|
Definition
| are hexadecimal-numbers assigned to specific physical memory located either in RAM or ROM-- software can access this memory by using these addresses. Memory addresses are communciation on the address bus. |
|
|
