Local Device Signal Control Circuit on Besa Local Bus

摘要

the design of a tunnel (external), memory (ram Distal DAC Analog Converter) technology as a support, especially on the history, this device (VESA device bus, local bus, isa bus, the signal and the speed of the i / o access of the impossible, to overcome the company is the best on this bus of the display signal in the control circuit. in the past, the history of the bus with the shadow (SHADOE) DAC i / o of the can is a vga chip, a memory DAC tunnel without support, the DAC right there. just as the vga chip to design the signal (LDEV # the command signal, the isa bus, the signal transmission is not because.this research is # m / io signal and w / r # signal decoding is the decoding part (1) and the decoding part (1) of the decoding result of switching off the input signal to be the output of the LDEV # control the first switching part (2), the switching part (2) of the output signal of the error. RDY # signal input output control the second switching part (3) is composed of a control circuit in the display signal, a memory input output control signal (m / io #) and light, the control signal (w / r #) decoding, the history of the car. with this device the signal (LDEV # signal), it isa with this device the signal (NEW LDEV # signal), the signal created by the i / o DAC to access to be able to buy a car with a baby in a device for control of the company to provide.