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Posted on March 12, 2022July 22, 2022

65816: Exploring the W65C816SXB Development Board

This is a work in progress, documenting my findings related to my 65816 build. Its rough, intending to get my findings written down before I forget them. I’ll hopefully be able to polish it as I go along. In this post I am documenting various signals in the Western Design Center’s W65C816SXB Development Board. I’ll …

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Posted on April 26, 2021July 22, 2022

6502: Memory Map and Address Decoder

The 6502 microprocessor can address a 64k byte range. As a system designer you must split this address space between RAM, ROM and I/O according to your requirements. My first 6502 build, which followed Ben Eater’s 6502 computer project, used a straight forward memory map with 16k bytes of RAM (address range $0000-$3FFF), 32k bytes …

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