I managed to get the 5×2 pin header, and a “jtag cable” from a previous employer. I haven't soldered in awhile so I messed with it awhile trying to desolder all the points to attach the 10-pin header. Well, turns out, as far as I know, that the ground connections are not drilled through. So I attached ground to the serial port. Then I look at the “jtag cable”. It's not wired at all like any JTAG I saw mentioned. Well, Bob did say he tried to make his own once and it didn't work. I guess that's the one he gave me. Don't know why, he's got several. One is USB, wish I borrowed that one now..

So I re-wire the jtag cable to use the “DLC5” aka “very poor man's jtag” pin-out. There are resistors on our PCB which should be plenty, but I added what I had and they're like 450ohm and seem to work… Then, software… tjtag would be awesome if it worked. It doesn't seem to use DLC5 correctly for me…? Then I noticed I need nTRST at 3.3v, so I tied that to the serial port as well. so our 14-pin JTAG has pin1 going straight to 3.3v (shoulda used a 100ohm resistor they say), and next 4 pins down the left side going to parallel port pins 2,13,3,4, and parallel port's ground going to serial port ground…

So I tried tjtag again and no dice. wtf. but some italian program for AR7 noticed the CPU ID as “1” so I searched and found UrJTAG. First detect and then include admtek/adm5120/adm5120 and you should be able to use flashmem 0x3cf00000 uboot.bin

ugh