Reads is a free assembler, compiler, and simulator for the 8051 which you can download and install on a PC.
Reads51 for Windows 95 / 98 / NT /XP. Reads51 v4.2 combines a Small C-compatible 8051 compiler with a relative assembler and linker. Also includes Enhanced Chip Simulator and single-chip mode.
Reads51 for Windows 95 / 98 / NT /XP. Reads51 v4.2 combines a Small C-compatible 8051 compiler with a relative assembler and linker. Also includes Enhanced Chip Simulator and single-chip mode.
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http://www.ziddu.com/download/16380841/SetupReads51.exe.html