Tag Archives: 6502

Noughts and crosses

I just inherited a load of books on programming the 6502 processor in assembly language (and a Kim-1 computer, more on that later!). Among them was an intriguing 1980 book by Rodnay Zaks called 6502 Games. Zaks wrote what, for … Continue reading

Posted in computers, microbit | Tagged , , , , , , | Leave a comment

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

Posted in Arduino, computers, nostalgia | Tagged , , , | Leave a comment

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

Posted in computers | Tagged , | 3 Comments

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

Posted in computers | Tagged , | Leave a comment

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

Posted in computers | Tagged , | 3 Comments