The Spectrum Digital XDS510-USBPlus enhanced JTAG emulator is low cost, along with a USB powered interface.

JTAG Emulator
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Product, Description, Price (US dollars)
Spectrum Digital XDS510 USB Plus (p/n 701905), XDS510 enhanced JTAG emulator has a USB powered interface. Only required for C/C++/Assembler development, 1200
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