June 2014
Beginner to intermediate
208 pages
7h 14m
English
Content preview from Computer Interfacing
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Interrupts
Address bus
Hold
Read/write
Effective
connection
under DMA
control
Figure 4.9 Basic scheme for a Direct Memory Access Controller
(DMAC)
boot-up program. The DMAC next sends a read or write
signal, as appropriate, via the peripheral driver to
memory so that data can then be transferred on the data
bus.
A useful facility of the DMAC, allowing it to handle
the transfer of blocks of data, is an automatic sequencing
mechanism controlled by a counter-register, that keeps
track of the number of bytes being transferred in a par-
ticular block. As an example of the possible speed of such
devices, the Motorola 6844 is capable of transferrin ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.