How to Interface 8086 to a Single 8-Bit Wide RAM

[yukari1310]

How to interface 8086 to a single 8 bit wide RAM (only one RAM is given)? How to connect 8086's A0, BHE, A1-A19 pins to the mentioned RAM?

 

[berkeman]

How to interface 8086 to a single 8 bit wide RAM (only one RAM is given)? How to connect 8086's A0, BHE, A1-A19 pins to the mentioned RAM?

What have you found so far? This is a very easy question to find an answer for by using Google, or even looking at Intel's website...

 

[yukari1310]

I only found the interfacing to low bank and high bank. I can't find anything about interfacing to a single bank. How do I connect both A0 and BHE when there's only one RAM available? Not two.

 

[rcgldr]

I would think you'd need an 8088 instead of an 8086 in order to get an 8 bit data bus.

 

[alphy]

To interface an 8086 processor to a single 8-bit wide RAM, you will need to follow a specific set of steps. First, you will need to determine the memory address range of the RAM and the corresponding address pins on the 8086 processor. In this case, since only one RAM is given, the entire address range of the RAM will be connected to the address pins of the 8086 processor.

Next, you will need to connect the A0-A7 pins of the 8086 processor to the data pins of the RAM. These pins will serve as the data bus for transferring data between the processor and the RAM.

To connect the A8-A19 address pins of the 8086 processor to the RAM, you will need to use a decoder. The decoder will take the address inputs from the processor and select the corresponding memory location on the RAM.

To connect the BHE (Bus High Enable) pin of the 8086 processor to the RAM, you will need to use a buffer. The BHE pin is used to enable the high byte of data during a memory access. The buffer will ensure that the high byte of data is correctly transferred between the processor and the RAM.

Finally, you will need to connect the remaining control signals, such as RD (Read) and WR (Write), to the corresponding pins on the RAM. These signals control the transfer of data between the processor and the RAM.

Overall, the key to successfully interfacing an 8086 processor to a single 8-bit wide RAM is to carefully map the address and control signals between the two components and use appropriate buffers and decoders to ensure proper data transfer.