Here's a pic that explains both layouts (Motorola and Webstar)



RESISTORS ARE OPTIONAL BUT PREFERRED

just a couple of quick notes that may be important on the WebSTAR
but it's been reported that both GND's need to be connected on webstar jtag for best results
how true this is i dont know, cos i connect both when ive done them
maybe somone can confirm if this is correct
also this connector numbering is back to front compared to other diagrams
going around

numbering doesnt really matter...you can always turn the IDC around
the thing about the webstar layout is that its even LESS resistant to noise, as there isnt a 1:1 correlation of data vs ground pins anymore (like you have on the 80pin IDE cables) so the cable has to be EVEN SHORTER

Awesome man thanks for these schemas I was lookin all over the net for them!!!

(11-18-2008 03:28 AM)racky29 Wrote:  just a couple of quick notes that may be important on the WebSTAR
but it's been reported that both GND's need to be connected on webstar jtag for best results
how true this is i dont know, cos i connect both when ive done them
maybe somone can confirm if this is correct
also this connector numbering is back to front compared to other diagrams
going around

Yes the grounds do need to be connected and the numbering isnt back to front if you look at the webstar board jtag points youll see that pin1 is represented with a square or ┘which is the same place as pin1 in diag

heres the shematic for buffered paralell jtag if anyone needs it...

Rajko, im a bit concerned some people might follow your webstar layout on post 1 which is incorrect on the numbering
so ive modded it to the correct numbering, this should stop a lot of people moaning thier blackcat cant connect

Unbuffered Jtag Schematics for Surfboards and WebSTARs

note : pins 2 and 7 both need to be connected to GND
pin 8 is not used, and resistors are optional

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Surfboard to WebSTAR Converter Connections


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Surfboard to WebSTAR Converter Connections


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Pins 2 & 7 may need connecting to Gnd for best results, pin 8 is not used.

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uhh, if it doesnt detect, just rotate it ?
all you changed was the numbers and the square, also why did you mess up the 2nd ground, it doesnt look as nice anymore

some people might not think of rotating the block cos they would think its wired correctly
also it wasnt your diagram i modded, it was from one that bad_ad posted somwhere which dident have the second gnd

racky29's post with a picture of the PCB really helped!

what is the 4 pin connector?
is it used in the flashing process?