Question: In a system with 8086 microprocessor, a ROM block in 64KB area from address 20000H is to be placed. ROM block, 4 x 27C128 EPROMs
In a system with 8086 microprocessor, a ROM block in 64KB area from address 20000H is to be placed. ROM block, 4 x 27C128 EPROMs of 16KB capacity each will be created with You can also add a RAM block to the 64KB space from address 60000H. is to be placed. The RAM block is made up of 2 62256 SRAMs of 32KB each. will be created. Evaluate the names given to memory ICs as given below: RxMx0: ICs to be placed in double addresses RxMx1 : ICs that are intended to be placed in single addresses ROM0x: ICs that are required to be placed at low addresses of the ROM block ROM1x: ICs that are required to be placed at high addresses of the ROM block In the given circuit, the microprocessor has address (at ADR[0-19]), data (at AD[0-15]) and control. (at BHE, WR, RD, M/ IO terminals) are properly separated and held assume. Separate address for isolated I/O map and even-odd banks for solution You should use seperate bank decoder. Configure the given ROM and RAM blocks to the address ranges given to the conditions mentioned above. Design the locating address resolution circuit. Address resolution with memory units Make all necessary connections between the circuit and the microprocessor. 00.bin, 01.bin, 10.bin and 11.bin files constitute binary content for ROMs. It two files, one at 2000H:0000H and the other at 2800H:0002H. A FAR type subroutine has been created. Test the accuracy of your address resolution circuit To do this, use both subroutines given above with segment:offset pairs. Write the calling assembly code inside the block. (These subroutines write some values to the low addresses of RAM)
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