IAR Systems has acquired Signum Systems, a vendor of JTAG emulators, in-circuit emulators and debuggers for embedded systems. F ounded in 1979 and based in Camarillo, CA, Signum supplies debuggers such as the “Chameleon Debugger” to developers of microcontroller-, microprocessor-, and DSP-based systems. Supported devices include all ARM processor architectures, Intel XScale, as well as all Texas Instruments’ DSP processor architectures.