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Maxon PM100 PMR EEPROM
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Topic: Maxon PM100 PMR EEPROM (Read 918 times)
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david17
Newbie
Posts: 8
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Maxon PM100 PMR EEPROM
«
on:
March 18, 2024, 08:18:32 pm »
Hi, I have removed the EEPROM AT93C56 from the pcb and read the code with a TL866. At the moment, all 4 channels are the same 171.43762. I would like to re-program this to 2 meters. Any idea how to work out the code needed.
Thanks, David.
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coromonadalix
Super Contributor
Posts: 5906
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Re: Maxon PM100 PMR EEPROM
«
Reply #1 on:
March 19, 2024, 04:13:25 pm »
well post the eeprom content first, and maybe some can or could help
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david17
Newbie
Posts: 8
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Re: Maxon PM100 PMR EEPROM
«
Reply #2 on:
March 19, 2024, 06:07:29 pm »
000000:86\08\97\26\D6\17\86\08\97\26\D6\17\86\08\97\26\
000010:D6\17\86\08\97\26\D6\17\
000060:\C8\C8\C8\C8\00\00\00\00\00\00\00\00\00\00\00\00\
000070:00\00\20\0A\00\00\03\30\00\00\00\00\00\00\00\00
000080:\00\00\00\00\00\00\0F\00\0F\00\00\32\00\00\00\00\
000090:all FF to end
My bin file after removing a lot of 00 and FF at the end.
David
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coromonadalix
Super Contributor
Posts: 5906
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Re: Maxon PM100 PMR EEPROM
«
Reply #3 on:
March 19, 2024, 10:47:06 pm »
found this today scroll down to maxon ....
http://www.cqham.ru/sch_eng.html
interfaces and softwares
as i see it
86\08\97\26\D6\17 is one channel
86\08\97\26\D6\17
86\08\97\26\D6\17
86\08\97\26\D6\17
for the rest
«
Last Edit: March 19, 2024, 10:54:03 pm by coromonadalix
»
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david17
Newbie
Posts: 8
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #4 on:
March 20, 2024, 05:15:50 pm »
Yes, as my 4 channels are the same 86\08\97\26\D6\17 must = 171.43762. Would be nice to know how the hex is worked out for other frequencies.
I had found the site in the link you sent. When click on the software link I get "File not downloaded: Potential security risk." so I stopped there.
I would think the code at the bottom is the power setting and CTCSS frequency.
The interface circuit shows a 25 pin coms connector not in my radio.
Thanks, David
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coromonadalix
Super Contributor
Posts: 5906
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #5 on:
March 20, 2024, 05:36:21 pm »
you have hex to decimal converters on the web
it could be in reverse meaning lsb in 1st and msb in last position
for the files i downloaded them with no problem ... must run on a 32bit machine or older ... files have 1997 dates ....
«
Last Edit: March 20, 2024, 05:50:45 pm by coromonadalix
»
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david17
Newbie
Posts: 8
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #6 on:
March 20, 2024, 06:15:21 pm »
OK, I will download the files on an old XP laptop I have.
I have decoded to dec.
hex 86\08\97\26\D6\17
dec 134/8/151/38/214/23
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david17
Newbie
Posts: 8
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #7 on:
March 26, 2024, 09:06:38 pm »
If I saved the code from my pm100 on to a DIL version of the AT93C56 that's a KM93C56 the code read back is not the same. This is with a minipro tl866. This AT 93C56 is listed in the tl866. I can save the code to M27c512 and read that back OK.
Anyone been able to reprogram this chip?
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bingo600
Super Contributor
Posts: 1989
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #8 on:
March 28, 2024, 08:25:26 pm »
Just an idea ...
This
http://radiomanual.info/schemi/Surplus_Civil/Maxon_PM-100_SM-2000_serv_G3VFP_1998.pdf
Points to this PLL Chip
https://www.nxp.com/docs/en/data-sheet/MC145191.pdf
That chip seems to have 3 registers taking :
REGC : 8bit
REGA : 24bit
REGR : 16bit
That gives 48bits ==> 6 bytes
That Rings a bell here ... Same length as your channel data
/Bingo
http://www.hallelectronics.com/getech/maxprog.htm
https://hamfiles.co.uk/forum/index.php?page=topicview&id=radio-help-advice%2Fmaxon-pm100-pm160
http://www.radioinfoboard.com/viewtopic.php?t=1948
Prog sw might be here too - needs membership
https://groups.io/g/radioprogramming/files/Maxon
«
Last Edit: March 28, 2024, 08:55:03 pm by bingo600
»
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david17
Newbie
Posts: 8
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #9 on:
April 01, 2024, 10:12:45 am »
bingo600. I have all the downloads you listed. I did notice my code matches with the 3 registers. I tried to work out the order they were sent but got a bit lost. My set TX power is set to HIGH so the 7th bit of C reg has to be a 1 but can't match that up. The code from Hamfiles is a DOS/Windows zip. I have loaded XP on an old laptop and will try that on there. I can read from the EEPROM with my TL866 save to an old eprom and that reads back ok, but if I save to an 8 pin DIL 93c56 and read back the code is not the same. I have ordered a SM AT93C56 to see if I can save to that. I tried with an Arduiono but as this is very old chip most of the libraries have gone.
If R reg is sent 1st then REFERENCE MODE, REFout = REFin/2 and R counter = dev by 1544.
Thanks for your help.
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coromonadalix
Super Contributor
Posts: 5906
Country:
Re: Maxon PM100 PMR EEPROM
«
Reply #10 on:
April 01, 2024, 03:37:38 pm »
attached stuff below
paying site
?
this one as them but there apparently an V1 and V2 models ??
https://radiosoftware.online/~OTHER_STUFF/MAXON/SOFTWARE/
for the cable interface ?
found this ?
http://www.radioinfoboard.com/viewtopic.php?t=1948
and this other site, but 1 download every 4 days when registred
https://www.mods.dk/manual.php?brand=maxon
but SW side there seem to be confusion about Maxon brand, apparently there is some programmer brand named Maxon
finally be very very careful some site report programming software ... i just got out of a NASTY surprise ....
«
Last Edit: April 01, 2024, 04:54:22 pm by coromonadalix
»
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