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 just visit:

http://ww2.sd.cybernex.net/~mcgyv/

where you can download the allready patched .RDF 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 dialing.

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  (see web page:
http://ww2.sd.cybernex.net/~mcgyv/   )

VHF:

RX 50.00 to 109.995          TX red light active on 80.00 to 109  (not
                             sure 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" are
                            flashing.But this is only between
                            110.XX to 111.XX  twoards the 110.8 MHZ
range, the
                            flashing seems to slow down in "pulse"
(notblinking 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

=============================================================================================================
Remember, the Mars/cap mod is not required to do this mod.


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.