A cache is a buffer for transferring disk sectors in and out of RAM. Data stored in a disk cache is a copy of data already stored on the physical disk.
DMA (direct memory access)
A method of transferring data from a device to memory without having the data pass through the microprocessor. Using DMA can speed up system performance.
DS-STN (Dual-scan super twist nematic) LCD
A
Floppy disk
A removable disk, also called floppy or diskette.
Hard drive
Also called fixed disk. A hard drive is connected to the computer and can be installed or removed. Data written to a hard drive remains until it is overwritten or corrupted.
The
I/O
Input/output. Refers to peripheral devices, such as printers, that are addressed through an I/O address.
I/O address
I/O stands for input/output. Peripheral devices, such as printers, are addressed through the I/O port address.
IRQ (interrupt request line)
The IRQ is a hardware line that a device uses to signal the microprocessor when the device needs the microprocessor’s
Glossary 101