Tag Archives: 6502

Cheap KIM-1 clone

I’ve written before about how the KIM-1 (my brother’s) was the first computer I ever used, and how the very first programming I did as a child was 6502 assembler rather than BASIC. This led to me to make little … Continue reading

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6502 breadboard computer part 8 – next steps

I recently achieved my goal of making a 1970s-style 6502 breadboard computer that I can use to practice machine code programming. It has a hexadecimal keypad for entering instructions, a 16×2 alphanumeric LCD display and a very basic monitor program … Continue reading

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6502 breadboard computer part 7 – working monitor program!

I love it when things work! Ok, it wasn’t entirely plain sailing, but progress on this has been rapid in the last few months. A quick recap: As a child in the 1970s I wanted my own self-contained single-board computer … Continue reading

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6502 breadboard computer – part 6 – shift key

Last time I added a 4×4 keypad to my 6502 breadboard computer so I can enter opcodes as hexadecimal numbers, but I was worried that I needed more keys and didn’t have enough I/O pins left. To make a self-contained … Continue reading

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6502 breadboard computer – part 5 hex keypad

Having made a very simple proto-monitor work that allows me just to read the contents of memory on the LCD display, I decided to get a hex keypad working as a next step. Eventually I’ll use the hex keypad to … Continue reading

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