04/16/2008 - Copyright © 2008 The PTR Group Inc.
Most embedded processors today support JTAG or one of its relatives like BDM
E.g., ARM/XScale, PPC, MIPS
Even the x86 has a JTAG port although it is rarely wired out
Grandma can barely send e-mail, let alone know what to do with a JTAG port
Some processors like MIPS come in different versions
Some with JTAG ports for development, some without in order to save $$$