Slightly off the wall idea... but you could buy an old Archimedes or RiscPC off eBAY. There's an ARM assembler built-in (OS, BASIC V, assembler, and some apps a

Slightly off the wall idea... but you could buy an old Archimedes or RiscPC off eBAY. There's an ARM assembler built-in (OS, BASIC V, assembler, and some apps are in ROM).