I’ve mentioned previously having trouble getting WINCUPL to create the following memory map: I figured that since I was expanding ROM, I might as well give myself a full 32k of RAM. WINCUPL didn’t like that though, giving me an error that it didn’t have enough pterms for my ROM_CS pin. I took the easy …
65816: Build 4 – Current Status – 7/15/2022
Build 4 – Current Specification As of 7/15/2022, Build 4 has tested successfully with: Both 65C02 and 65C816 up to 10 MHz where I started to get display glitches 524k memory. Current configuration: ~457k RAM ($0000-$F7FF, $20000-$7FFFF), 55 ns ~67k ROM ($F800-$1FEFF), 70 ns 256 bytes I/O ($1FF00-$1FFFF) 65C22 VIA ($1FF10, shift register dedicated to …
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6502: I/O Devices
My first 6502 build, which followed Ben Eater’s 6502 computer project, has a 16 character by 2 line LCD and a single red LED for output and four push button switches for input. Ben stopped his original video series with just a single push button, but I added three more as pictured on the front …