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Dual-ported RAM (DPRAM), also called dual-port RAM, is a type of random-access memory (RAM) that can be accessed via two different buses.. A simple dual-port RAM may allow only read access through one of the ports and write access through the other, in which case the same memory location cannot be accessed simultaneously through the ports since a write operation modifies the data and therefore ...
Dual-ported RAM allows the CPU to read and write data to memory as if it were a conventional DRAM chip, while adding a second port that reads out data. This makes it easy to interface with a video display controller (VDC), which sends a timing signal to the memory and receives data in the correct sequence as it draws the screen.
However, it can open two memory pages at once, which simulates the dual-port nature of other video RAM technologies. The earliest known SGRAM memory are 8 Mbit [ 6 ] chips dating back to 1994: the Hitachi HM5283206, introduced in November 1994, [ 34 ] and the NEC μPD481850, introduced in December 1994. [ 35 ]
A central processing unit (CPU) may use a test-and-set instruction offered by another electronic component, such as dual-port RAM; a CPU itself may also offer a test-and-set instruction. A lock can be built using an atomic test-and-set [1] instruction as follows:
dual-port dRAM controller 40 74F764: 74x765 1 dual-port dRAM controller with address latch 40 74F765: 74x776 1 8-bit latched transceiver for FutureBus: three-state and open-collector 28 SN74F776: 74x777 3 triple latched transceiver three-state and open-collector 20 74F777: 74x779 1 8-bit bidirectional binary counter three-state 16 MC74F779 ...
Below is the full 8086/8088 instruction set of Intel (81 instructions total). [2] These instructions are also available in 32-bit mode, in which they operate on 32-bit registers (eax, ebx, etc.) and values instead of their 16-bit (ax, bx, etc.) counterparts.
As the Los Angeles community continues to band together to support first responders and those devastated across the area by the horrific fires, one furry hero is helping deliver hope to people who ...
A digital pattern generator is a piece of electronic test equipment or software used to generate digital electronic stimuli. Digital electronics stimuli are a specific kind of electrical waveform varying between two conventional voltages that correspond to two logic states ("low state" and "high state", "0" and "1").