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Author Topic: Replaced JTAG wiring to new transister method now just black screen  (Read 1166 times)
Grandmaster
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« on: December 22, 2010, 04:53:52 AM »

Changed from the diode method to the transister method by boxxdr. Now nothing happens just turns on and black screen thats it. It is a Jasper BB 512mb w/ HDMI which i changed the wiring as it had booting issues also the rol board bahaved strange but that did not bother me. Should i just change it back to the diodes or is there something else im supposed to do for the new wiring to work. Currently its running latest freeboot dash. Also the hdmi port never worked after the JTAG was done i just assumed that was normal i use the cord with the HD and TV switch has the rgb and yellow red and white which worked fine also just wanted to check if that is normal also. I done some research and found other people have had similar issues any help would be great.
For the transister method i followed the directions on this link hxxp://boxxdr.com/boxxdrjtag.html  1 thing i did notice is that in the pics on the link the resisters are not the same as the 1s they are recommending to use.
change xx to tt in link.
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Blackaddr
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« Reply #1 on: December 22, 2010, 08:54:54 AM »

Should i just change it back to the diodes or is there something else im supposed to do for the new wiring to work.

Your diode wiring probably used the ARGON_DATA/DB1F1 connections points for JTAG.  If you followed BOXXDRs tutorial you are now using AUD_CLAMP/DB1F1.

You need to modify your SMC to match the new wiring configuration.  Either obtain an SMC for your jasper that has already been modified to use AUD_CLAMP instead of ARGON_DATA, or make it yourself using the SMC Utility v1.2.
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bluespace77
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« Reply #2 on: December 22, 2010, 03:05:52 PM »

You don't need to link to boxddr's tutorial, it was blackaddr who came up with the transistor method. In his SMC_UTIL/ SMC_IO archives, there's a PDF file which explains it all nicely.

As for the resistors, those pictured are 10K like it says to use. I've used the same resistors myself without issue.

brown black black red brown = 1 0 0 00 1% tolerance.
« Last Edit: December 22, 2010, 03:11:10 PM by bluespace77 » Logged
Grandmaster
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« Reply #3 on: December 22, 2010, 03:08:43 PM »

Cheers For help i got the utility allready. I am slowly figuring it out i have to patch the image using cmd with the smc config im using for it to work. Make a new freeBOOT image. Need a little help still im going to leave it for now and take a look at it later today.
Got the info from the files i think ill get this done today will have a go at it anyway.
0) Get my orig smc with 360 flash tool and name it unhacked_smc_dec.bin

1) Run your original or donor SMC through the custom mode.  The SMC version must be compatible with your mobo and must not have the hack already in it.  If you have a Xenon console, you can skip step 2.

e.g.             "Name of smc unhacked"       "output smc file with hack"
smc_util custom unhacked_smc_dec.bin custom_smc_dec.bin

2) If you have an HDMI console that does not use DB1F1 for TDI and AUD_CLAMP for TMS, you must also change the I/O in the SMC.

e.g.
smc_util io custom_smc_dec.bin new_io_smc.bin /i


;[NAME=TMS_PATCH]
;; Search for the 'set_jtag_tms' and 'clr_jtag_tms' functions
;; SETB <TMS> MOV <TMS_DELAY> DJNZ ACC <addr> RET CLR <TMS>
;; = 0xD2 0x?? 0x74 0x?? 0xD5 0xE0 0xFD 0x22 0xC2 0x??
;;     0 1 2 3 4 5 6 7 8 9   <= this line is just for byte labeling
;[PAT=D2007400D5E0FD22C200]
;;     0123456789            <= this line is just for byte labeling
;[WILD=0101000001]
;; AUD_CLAMP = CC, DB1F1 = C0, ARGON_DATA = 83, TRAY_OPEN = CF
;[1=CC]
;[9=CC]
;[\TMS_PATCH]
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Grandmaster
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« Reply #4 on: December 22, 2010, 03:14:19 PM »

You don't need to link to boxddr's tutorial, it was blackaddr who came up with the transistor method. In his SMC_UTIL/ SMC_IO archives, there's a PDF file which explains it all nicely.

As for the resistors, those pictured are 10K like it says to use. I've used the same resistors myself without issue.
No disrespect bluespace but your comments are no help and just stating the obvious as i have the application and can read ive never used it but for response and help purposes was just linking the method i used to re-wire my 360 so everyone who wants to respond in a helpful way has the info i have and i dont get questions about the wiring stage of this.
« Last Edit: December 22, 2010, 03:19:31 PM by Grandmaster » Logged
Grandmaster
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« Reply #5 on: December 24, 2010, 01:38:57 AM »

Has been busy with christmas and all so have not had much time. K so far got my orig nand image extracted the smc_dec.bin file ran it through smc_util 1v2 and now have my new_io_smc.bin for my wiring. Now i need to get this into my freeboot image. Any help or pointers to make this go faster would be great as i kinda wanted to have it done by tomorro so the kids can play the kinnect there happy and we can drink. 
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Grandmaster
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« Reply #6 on: December 24, 2010, 03:34:03 AM »

OK ive made my image now im about to resolder my LTP cable as i dont think there is any other way to get the image over unless i changed my wiring back so ill post back how i went and if it worked.
Takes alot of reading and piecing info from everywhere together to make yourself a tutorial kindof but in the end it is not really that hard once you have done 1. Guess its like riding a bike once you have learned you dont forget. In my case anyway. Thanks Blackaddr for pointing to the utility and creating it,  after that its been smooth sailing hopefully this will stop the booting issues i was having and get my HDMI port working.
« Last Edit: December 24, 2010, 04:36:18 AM by Grandmaster » Logged
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