Chip Numbers, Acronyms and Things: Difference between revisions
Jump to navigation
Jump to search
Chip Numbers, Acronyms and Things (view source)
Revision as of 10:33, 28 February 2012
, 12 years agoAdded CPL/RPL/DPL
| [unchecked revision] | [unchecked revision] |
mNo edit summary |
(Added CPL/RPL/DPL) |
||
Line 26:
;Call Gate:Much like an software driven interrupt, a call gate allows access to other code from a different privilege level.
;Combicontroller:Combine a Floppy disk controller chip and a Hard disk controller chip and you have a combicontroller. It is not limited to just floppy+hard drive chips. Usually meant to refer to the actual plug-in card where you have two floppy and two hd IDE ports.
;CPL:Current privilege level. The current [[Protected Mode|ring]] in which code is being executed.
;Descriptor:An 8 byte structure that describes a segment/gate/task in protected mode.
;DMA:[[DMA|Direct Memory Access]]. Allows peripheral devices to access main memory directly, bypassing the CPU.
;DPL:Descriptor privilege level. The privilege needed to use a descriptor in the [[GDT]] or [[IDT]]
;EISA:Extended ISA. Basically extends the ISA bus from being 16-bit to being 32-bit. Designed for 386 + 486 systems.
;ESDI:Enhanced Small Device Interface. A hard disk controlling mechanism. Successor to the ST506/412 interface. Can handle pumping data out at 24mbits (3mb a second)
Line 59 ⟶ 61:
;PIT:Programmable Interval Timer. The PIT is like a stopwatch with periodic alarm...
;POST:Power On Self Test. Your computer does this when you turn it on in order to assess that its 100% A-OK and can boot up without error.
;RPL:Requested Privilege Level. Used in [[Protected Mode]] to pretend running at a lower privilege level for accessing a descriptor.
;RTC:Real Time Clock
;SCSI:Small Computer Systems Interface. A different method from ATA/IDE for connecting devices to your computer.
| |||