pcjs.org | The Original IBM PC in Your Browser

Emulators for the PC and other platforms. In Javascript -- which seems crazy; I think it's more likely that my AT will still work in 20 years than that current Javascript will!

to 6502 emulation javascript osi pc ... on 03 October 2014

PROMAL for the Commodore 64

An indentation-structured language for the C64. This would have been roughly contemporary with occam. Looks like quite a decent (B-ish) language.

to 6502 c64 commodore compiler indentation language-design retrocomputing software ... on 03 October 2014

Ray Carlsen's Home Page

Repair guides for all the Commodore 8-bit machines and many of the peripherals (disk drives, monitors).

to 6502 8bit c128 c16 c64 commodore disk electronics monitor psu repair retrocomputing ... on 05 August 2014

Laughton Electronics | does what other contractors can't or won't

Some great reverse engineering, and a couple of interesting homebrew CPU designs: a 14500-ish 1-bit CPU using an EPROM, and a 24-bit extension to the 6502.

to 6502 cpu electronics homebrew microcontroller microprocessor repair reverse-engineering ... on 27 April 2014

Welcome to AppleLogic

Analysing and rebuilding 8-bit Apple computers.

to 6502 apple apple2 electronics fpga microcomputer retrocomputing ... on 13 January 2014

Exile disassembly

The classic BBC Micro game.

to 6502 acorn bbc exile retrocomputing reverse-engineering ... on 14 December 2013

[CSDb] - User Forums

Some interesting C64 low-level programming stuff here.

to 1541 6502 c64 retrocomputing ... on 11 July 2013

ACME - the ACME Crossassembler for Multiple Environments

For 6502 and related processors.

to 6502 assembler retrocomputing software ... on 23 May 2013

Exomizer 2 website

Low-overhead compressor, capable of producing self-decompressing 6502 code.

to 6502 compression retrocomputing software ... on 23 May 2013

GCR decoding on the fly

As it says -- very neat.

to 1541 6502 c64 floppy gcr retrocomputing ... on 15 April 2013