ASM80 is an free online IDE allowing you to code and compile assembler code for 8-bit processors (8080, Z80, 6809 and 6502).
Main Features:
- Code editor
- Simulated workspace for your files (it’s stored technically in your browser, so you haven’t to got any “server account”)
- Compiling engines for 8080/8085, Z80, 6502, 6800 and 6809 CPU
- Embedded emulators for all these CPUs
- Emulators for some computers:
- Czech computers PMI-80, PMD-85, JPR-1 (also known as SAPI-1)
- ZX Spectrum
- Grant Searle’s Single Board Computers with 6502, 6809 and Z80
- Nearly the same syntax and directives for all CPUs
- Macros
- Preprocessor
The author also is providing a desktop-based version of ASM80, called IDE80, which is currently available for Windows, as an Alpha release.
Link: Old uElectronics Blog
Online IDE: ASM80
Desktop IDE: IDE80