Tristate lines in the context of the DMA 8257 refer to the control lines that can be in one of three states: high, low, or high impedance (floating). This high impedance state allows multiple devices to share the same bus without interfering with each other, as it effectively disconnects the device from the bus when it is not actively transmitting data. The tristate feature is crucial for managing data transfers between the CPU and peripherals in a system, enabling efficient communication and minimizing conflicts.
The 8257 is a three channel DMA controller.
Its a Programmable Direct Memory Access (DMA) controller.
8237 provides better performance, compared to 8257. The distinctive feature of 8237 chip is that it provides, many programmable control and dynamic reconfigurability features which enhance the data transfer rate of the system remarkably
it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device
The GCF is 1
The Young and the Restless - 1973 1-8257 was released on: USA: 7 November 2005
The "tristate area" of New York consists of New York, New Jersey and Connecticut.
2881 + 5376 = 8257
DMA operations
DMA Distribuidora was created in 1950.
DMA - magazine - was created in 1993.
DMA - magazine - ended in 2003.