I would like to remotely force a reconfiguration of my XUP board from CompactFlash by talking to the SysACE chip, perhaps with an iMPACT script. According to the "System ACE CompactFlash Solution" document (ds080.pdf), the necessary capability is available through the CONTROLREG register, but that register is unfortunately not exposed through the JTAG interface (as verified in the xccace.bsd BSDL file).
But perhaps there's some other way of accomplishing the same thing? Does anybody have any suggestions?