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DMA-33 <Ultra ATA>

Alias:
UATA, ATA-33, Ultra ATA/33, UDMA and Ultra DMA
Field:
Personal computer > I/O > IDE/ATA > DMA-33

IDE which the Quantum corporation and the Intel corporation announced in 1996, connect the personal computer and the storage unit of the hard disk and the like (ATA) extended specification of standard. In the succession specification of EIDE which is standardized as ATA-2, it was standardized in 1998 as ATA/ATAPI-4 with ANSI. The highest data rate is 33MB/s. The Quantum corporation calls Ultra ATA, but there are also times which the Intel corporation calls “Ultra DMA”, is called ATA-33 or DMA-33 etc to in addition to.

DMA-66 <Ultra ATA/66>

Alias:
UATA/66, ATA-66, Fast ATA-2, UDMA/66 and Ultra DMA/66
Field:
Personal computer > I/O > IDE/ATA > DMA-66

IDE which the Quantum corporation and the Intel corporation announced in 1998, connect the personal computer and the storage unit of the hard disk and the like (ATA) extended specification of standard. Also “Ultra DMA/66” “Fast ATA-2” and so on is called. Transfer rate being maximum, has reached the two times the 66.6MB/s and Ultra ATA. The connector has used the same 40 pin connectors until recently, but the signal conductor has become with 80 of times. Downward compatibility is guaranteed, can connect also the hard disk of Ultra ATA specification and EIDE specification. By the way the formal calling with “Ultra DMA Mode 4”, is standardized formally as a portion of the ATA-5 standard of ANSI.

DMA controller <DMA controller>

Reading: D m a controller
Full spelling: Direct Memory Access controller
Field:
Personal computer > I/O > DMA controller

The exclusive use LSI which does the control of communication do data transfer at the time of DMA transferring where various devices and the memory which is on the motherboard mind CPU and without thing. The DMA controller being loaded usually to the motherboard of the PC/AT compatible machine, the floppy disk controller (FDC) and the like has utilized. As for this DMA controller one device (or tip/chip) possesses one channel with eight channels (DMA channel). Recently it is being sidestepped partly due to the fact that the bus is possessed at the time of thing and the communication whose transmission speed is slow relatively, (in comparison with other part of computer where efficiency improves dramatically), as technology.

DMA channel <DMA channel>

Reading: D m a channel
Full spelling: Direct Memory Access channel
Field:
Personal computer > I/O > DMA channel

Do data transfer at the time of DMA transferring where various devices and the memory which is on the motherboard mind CPU and without thing, the device the channel which is used in order to require transfer vis-a-vis the DMA controller. Because one channel cannot be shared with the plural devices, in order for the DMA channel not to collide between the device which utilizes DMA transfer, it is necessary to set.

DMCA <[dejitarumireniamu] Copyright Act>

Full spelling: Digital Millennium Copyright Act
Field:
Security > right protection > DMCA

It was formed in 1998 October and was enforced in 2000 October, the American Copyright Act. WIPO (the worldwide intellectual property right system) with being something which is enacted it concluded “copyright treaty” on the basis of “public demonstration record treaty” in 1996 December, it stipulates the way and the like of copyright of the information which is digitalized.

There is a stipulation which prohibits the publication of the kind of expedient which copyright protective technology (copy prevention function and the like) you evade as the stipulation which is not happened to see excessively in existing copyright laws, neutralize. Centering on this stipulation, with former Copyright Act the duplication which is limited to the private utilization which is recognized to the point where it is restricted, has caused the rally where the consumer is strong (backup of the software and from CD the dubbing etc to MD). In addition, at the point where the researcher of copyright protective technology pointed out the vulnerability of existing technology, because the fear of being prosecuted with DMCA violation occurs, you say that it becomes not be able to enter to America, also “disturbance” occurs.