Software mods for the FT8100 ver:1.00 date 03/98 
Ingra-Beton@t-online.de  and  mcgyv@hotmail.com 
-------------------------------------------------- 
The FT8100 uses a little bit differend aproach for 
the up/download. It is not possible to change the 
Country Codes via Software. The firmware and EEPROM 
is a little bit bigger so a secure check can be 
done and if the Hardware configuration won't match, 
the FT8100 is refusing to accept the data file. 

There must be anyway either a Secret menu or at 
least 3 Jumpers for setting the country code. 
  

But as usually Software rules, so it is possible 
to move the lower and upper limits for RX and TX. 

With this way the FT8100 will FULL OPEN and can 
be used on all Frequencies for RX and TX where 
the Hardware will allow it. 

You will get a FREEBAND mod and the good thing 
is that the ARS will still work. 
  

To make the mod you will need the ADMS 2D Software 
and a HEX editor. 

Or you can download the allready patched .RDF file              (Hold 
the SHIFT key when you click on the file) 
It does not matter what Hardware mod you have (or have 
done) or for witch country your FT8100 is configured. 

Technicaly you are only moving the limits for 
the Frequecny dealing. 
  
  

Make a .RDF file and edit it with a HEX editor. 

The values on the following addresses are defining 
the lower and upper limits for RX and TX on the 
VHF and UHF bands 

Band      Lower limit adr   Upper Limit adr 
=========================================== 
VHF RX    0A66 and 0B2A     0A6A and 0B2E 
UHF RX    0A76 and 0B8F     0A7A and 0B93 
------------------------------------------- 
VHF TX    0A6E              0A72 
UHF TX    0A7E              0A82 
------------------------------------------- 
  

Value example: 
-------------- 
VHF RX    0050              0280 
UHF RX    0280              0650 
VHF TX    0050              0280 
UHF TX    0280              0650 
  

If you insert the values from the example in the 
abouve addresses, the FT8100 will be opened for 
RX and TX from 50-280MHz and 280-650MHz. 
  

After modification the following results are 
mesured. 
  
  

RESULTS: 
Upload:  Free.rdf   &   Stock.tpl             (Hold the SHIFT key when 
you click on the file) 
  

VHF: 

RX 50.00 to 109.995          TX red light active on 80.00 to 109  
(notsure if it really TX'ing) 
                                          Also all the digits "X" are 
flashing. 
                                          Example:  50.XX to 109.XX 

RX 110.000 to 136.995       Same as above, but has the "AM" 
                                            displayed.Also all the 
digits "X" areflashing. 
                                            But this is only between 
                                            110.XX to 111.XX  twoards 
the 110.8 MHZ range, the 
                                              flashing seems to slow 
down in "pulse" (not blinking as fast.) 

RX  137.00 to 210.630         Does TX but not tested for RX on a 
scanner. 

RX  201.630                         the .630 starts to flash. The 201. 
does not flash. 

RX     from 201.63 to 205.995 flashes, however still unknown if it is 
true   TX. 

RX 206.00 to 280.00           TX but unknown if it is true TX 

========================================================================
====================================== 

UHF: 

RX 280.000 to 550.000        TX light is on, but need to chek for true 
TX 

RX 551.00 to 650.000           TX light is on, but need to chek for true 
                                              TX, also 551.XXXto 650.XXX 
blinks 

RX       750 to 869.00   NO TX 

When at 750.00 , if you cycle backwards...you end up at 550.00...rotate 
forware to get to the 600.00MHZ band 

RX 894.00 to 1330.00       No TX 

========================================================================
===================================== 
We are currently seeking others to help us test these mods for other 
countries & different production codes. 

If You have removed the resistor chip & lost it & want the stock mode 
back in your radio you will need to 
upload this Mars to Stock .TPL      (Hold the SHIFT key when you click 
on the file) 
  

This mod is a product of the intercontinental 
digital cooperation between: 

Mazedonia - Ingra-Beton@t-online.de 
USA       - mcgyv@hotmail.com 

East and West, together on the Net.