You can find UVI51 (8051 simulator and more...) at
www.dte.uvigo.es
but limited to 500 source code lines.

If you can't find it or 500 lines is not enough for you, please send me an e-mail and I'll be happy to send you a copy of the last version (more than 3000 lines).

UVI51 can simulate up to 4 MCUs interconnected, and several external peripherals (leds, pushbuttons, LCD screen, etc.).

UVI51 runs under MSDOS but can be used from Windows 95, 98 and NT. Also from LINUX using dosemu.

Regards,

Alfredo del Rio.