To put "this" more faster you can change the db25 to a usb2.0...

usb_jtag using Cypress FX2 chip or cy7c68013a, i think this is the project use in ali house, I think...

The "Xilinx Platform Cable USB" is based on a FX2 chip.


Pin's:
Port C.0: TDI
Port C.1: TDO
Port C.2: TCK
Port C.3: TMS

USB>>>> CY7C68013A - EZ-USB FX2)>> JTAG(TDI,TDO,TCK,TMS)

For the rest used the "daemon" files you have all there:
"mips32"
Instruction and registers, try it.... and look to ejtag-0.2 too....

This is the info I have.

Regard's and good job.

C U

Edit:

all files are here:
pass:ali


************by singlemaster**************************

About sdram reading i think is possible if fw send it, maby by rs232 (puting wachdog working) let see if someone read this post...