µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.




Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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6502 bits

Some 6502 information, tips and tricks

First written in 1976, Microsoft BASIC for the 8 bit MOS 6502 has been available for virtually every 6502-based computer including the Commodore series (PET, C64), the Apple II series, Atari 8 bit machines, and many more.

Create your own version of Microsoft BASIC for 6502

The original NMOS version of the MOS 6502, used in computers like the Commodore 64, the Apple II and the Nintendo Entertainment System (NES), is well-known for its illegal opcodes: Out of 256 possible opcodes, 151 are defined by the architecture, but many of the remaining 105 undefined opcodes do useful things.

How MOS 6502 Illegal Opcodes really work

And some final candy: 6502 assembler and emulator written in JavaScript: 6502asm.com

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