The resulting decrease in bus traffic was particularly important in systems relying heavily on DMA.

The programmed I / O bus would typically run low to medium-speed peripherals, such as printers, teletypes, paper tape punches and readers, while DMA was used for cathode ray tube screens with a light pen, analog-to-digital converters, digital-to-analog converters, tape drives, disk drives.

A simplified, inexpensive form of DMA called " three-cycle data break " was supported ; this required the assistance of the processor.

The DMA controller chip was included on the PLUS-type memory expansion board for the EX and HX, and on regular ISA memory expansion cards sold by Tandy and other companies for the 1000, 1000A, and 1000HD.

The ADC / DAC, which became known as the " Tandy DAC " in games that supported it, was broadly similar in function to sound devices which connected to the parallel port ( such as the Disney Sound Source ), but unlike those devices it was integrated onto the motherboard, supported DMA transfers and could sample at frequencies up to 48 kHz.

The Ultra DMA ( UDMA ) interface was the fastest method used to transfer data between the computer ( through the ATA controller ) and an ATA device until Serial ATA.

In the original IBM PC, there was only one Intel 8237 DMA controller capable of providing four DMA channels ( numbered 0-3 ), as part of the so-called Industry Standard Architecture, or ISA.

With the IBM PC / AT, a second 8237 DMA controller was added ( channels 5-7 ; channel 4 is unusable ), and the page register was rewired to address the full 16 MB memory address space of the 80286 CPU.

There was a CPU with the 68070 designation, which was a licensed and somewhat slower version of the 16 / 32-bit 68000 with a basic DMA controller, I²C host and an on-chip serial port.

The iBook G3 was the first Mac to use Apple's new " Unified Logic Board Architecture ", which condensed all of the machine's core features into two chips, and added AGP and Ultra DMA support.

In order to increase memory bandwidth, the Chip RAM data bus was extended to 32-bit width ( as in the A3000 ) and the Alice chip ( replacing OCS / ECS Agnus ) was improved to be able to support full width access for bitplane DMA.

Sinclair Broadcast Group owned both the Fox and WB affiliates in the DMA prior to the September 2006 merger of UPN and WB into a newly created CW Network and was forced by Fox to convert its WB affiliate ( WDKA ) into a MyNetworkTV affiliate ( MY49 ).

Menoher instituted a reorganization of the Air Service based on the divisional system of the AEF, eliminating the DMA as an organization, and Mitchell was assigned as Third Assistant Executive, in charge of the Training and Operations Group, Office of Director of Air Service ( ODAS ), in April 1919.

Moving the card off the ISA bus, which was already approaching obsolescence, meant that no line for host-controlled ISA DMA was available, as the PCI slot offers no such line.

The EMU10K2's audio transport ( DMA engine ) was fixed at 16-bit sample precision at 48 kHz ( like the EMU10K1 in the original Live!

The most unique aspect of the system is its multicore processing node which integrates six MIPS64 cores, a crossbar memory controller, interconnect DMA engine, Gigabit Ethernet and PCI Express controllers all on a single chip which consumes only 10 watts of power, yet has a peak floating point performance of 6 GFLOPs.

On a regular NTSC or PAL display, DMA audio playback is limited to a maximum output rate of 28867 values per channel ( PAL: 28837 ) per second totaling 57674 ( PAL: 57734 ) values per second on each stereo output.

* SBC 11 / 21 ( boardname KXT11 ) Falcon and Falcon Plus — single board computer on a Qbus card implementing the basic PDP-11 instruction set, based on T11 chipset containing 32 KB static RAM, two ROM sockets, three serial lines, 20 bit parallel I / O, three interval timers and a two-channel DMA controller.

This is in addition to the hardware standard on the IBM PC, PC / XT, and PC / AT motherboards: keyboard interface, expansion slots, memory subsystem, DMA, interrupt controller, and math coprocessor socket.

These symbols, seen on hardware schematics of computer systems with DMA functionality, represent electronic signaling lines between the CPU and DMA controller.

The new Double Address Cycle ( DAC ) mechanism, if implemented on both the PCI bus and the device itself, enables 64-bit DMA addressing.

As an example of DMA engine incorporated in a general-purpose CPU, newer Intel Xeon chipsets include a DMA engine technology called I / O Acceleration Technology ( I / OAT ), meant to improve network performance on high-throughput network interfaces, in particular gigabit Ethernet and faster.

Like PCI, no central DMA controller is required since the DMA is bus-mastering, but an arbiter is required in case of multiple masters present on the system.

* DMA Fundamentals on Various PC Platforms, from A. F. Harvey and Data Acquisition Division Staff NATIONAL INSTRUMENTS

The RiscPC also offers DMA support in the first two podules on the bus.

Under the Amiga architecture, the Agnus ( Alice on AGA models ) coprocessor is the direct memory access ( DMA ) controller.

DMA controllers route data directly between external interfaces and memory, bypassing the processor core and thereby increasing the data throughput of the SoC. Microcontroller-based system on a chip

Since existing DOS programs expected to be able to initiate host-controlled ISA DMA for producing sound, backward compatibility with the older Sound Blaster cards for DOS programs required a software driver work-around ; since this work-around necessarily depended on the virtual 8086 mode of the PC's CPU in order to catch and reroute accesses from the ISA DMA controller to the card itself, it failed for a number of DOS games that either were not fully compatible with this CPU mode or needed so much free conventional memory that they could not be loaded with the driver occupying part of this memory.

AMS was redesignated the U. S. Army Topographic Command ( USATC ) on September 1, 1968 and continued as an independent organization until 1972, when it was merged into the new Defense Mapping Agency ( DMA ) and redesignated as the DMA Topographic Center ( DMATC ) ( see below ).

Some IRQ and some DMA channels are used on the motherboard and not exposed on the expansion bus.

Further, as a " parasitic " or " symbiotic " coprocessor, the NiTro-VLB was designed to co-opt the host 486 processor from running, and used four megabytes of the host 486 motherboard's system memory as a DMA buffer ( although the NiTro-VLB required its own separate DRAM main memory, in addition to any memory installed on the host 486 motherboard ).

If a motherboard chipset wasn't capable of DMA, Vérité was forced to operate in FIFO mode and performance dropped dramatically.

A PCI architecture has no central DMA controller, unlike ISA.

The other drawback is that IDE uses programmed I / O unlike a SCSI drive that can directly access the RAM ( DMA ).

Channel I / O is not unlike the Direct Memory Access ( DMA ) of microcomputers, only more complex and advanced.

The earlier 1000 / 1000A, 1000 HD, 1000 EX and 1000 HX models, like the IBM PCjr, did not have a DMA controller, but could be upgraded with one.

Adding the DMA chip improved the speed and IBM PC-compatibility of these earlier Tandy 1000 models.

As an example usage of DMA in a multiprocessor-system-on-chip, IBM / Sony / Toshiba's Cell processor incorporates a DMA engine for each of its 9 processing elements including one Power processor element ( PPE ) and eight synergistic processor elements ( SPEs ).

The VG230 contained a 16 MHz NEC V30HL processor and IBM PC / XT-compatible core logic, LCD controller ( CGA / AT & T640x400 ) with touch-plane support, keyboard matrix scanner, dual PCMCIA 2. 1 card controller, EMS 4. 0 hardware support for up to 64 MB, and built-in timer, PIC, DMA, UART and RTC controllers.

IBM PPC440 core based system-on-a-chip, 266 MIPS, PCI, 2x Ethernet, 2x UARTS, DMA controller, L1 / L2 cache Broad Reach Engineering Website

Blood Money is a scrolling shooter game developed by DMA Design for the Amiga, Commodore 64, Atari ST and IBM PC compatibles ( MS-DOS ).