• IC-CS-X patcher
  • Disclaimer
  • Motivation
  • Usage
  • Theory behind
    • Channel in details

IC-CS-X patcher

Disclaimer

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, YOU ARE USING THIS AT YOUR OWN RISK. PATCHING THE FIRMWARE MIGHT VOID YOUR TRANSEIVER WARRANTY. ENSURE MAKING A BACKUPS AND THINK OF WHAT ACTIONS YOU ARE PERFORMING. NONE OF THE AUTHORS, CONTRIBUTORS, ADMINISTRATORS, OR ANYONE ELSE CONNECTED WITH THIS REPOSITORY, IN ANY WAY WHATSOEVER, CAN BE RESPONSIBLE FOR YOUR USE OF THE SOFTWARE BELOW.

Motivation

Icom CS software for IC-F0 model is back from 1997, requires DOSbox and not more usefull than xxb. That's how we get IC-CS-X

TODO Usage

Syntax: ./ic_f300_patcher.sh -s %channel_numeber%=%valuein kHz% -f %path/to/x6110_app%-p %power_setting% -m %modulation_depth%

File will be created from EMPTY.ICF template, if not provided.

See ./ic_f300_patcher.sh -h to see the list of supported values for changing.

Help and fallback is not yet stable, so follow the available values:

%channel_numeber%	1-30
%power_setting%	l1, l2, h (default)
%modulation_depth%=	w (default)

Example:

./ic_f300_patcher.sh -s 1=172867 -p l1 -m n

As soon as this script substitutes the existing values inside the binary, provided values shoud have the same bit-length as default. Otherwise it may lead to the segmentation fault. Remember to backup the firmware.

Theory behind

Well, it needs a bit of a hex-magic. But valuables are easy find-and-replaceable in hexeditor. Here are some offsets to remember:

Start offset of the Rx freq of the first Channel of the first bank - 0000050b

Length of channel record is 44 bytes?

#!/bin/bash
result=$(( 0x50b - 0x2c ))
for i in {0..30}; do
    result=$(($result + 0x2c))

    if [ "$i" -eq 9 ]; then
        result=$(( $result + 0x8 ))
    elif [ "$i" -eq 14 ]; then
        result=$(( $result + 0x8))
    elif [ "$i" -eq 23 ]; then
        result=$(( $result + 0x8))
    fi


    printf "%d,  0x%X\n" "$((i + 1))" "$result"
done

Here is the comparison of calculated channel offsetts and the real one, obtained from the incremental changes diffing

ch	offset calculated	real offset
1	0x50B	0x50b
2	0x537	0x537
3	0x563	0x563
4	0x58F	0x58f
5	0x5BB	0x5bb
6	0x5E7	0x5e7
7	0x613	0x613
8	0x63F	0x63f
9	0x66B	0x673
10	0x69F	0x69f
11	0x6CB	0x6cb
12	0x6F7	0x6f7
13	0x723	0x723
14	0x74F	0x74f
15	0x783	0x77b
16	0x7AF	0x7b5
17	0x7DB	0x7db
18	0x807	0x807
19	0x833	0x833
20	0x85F	0x85f
21	0x88B	0x88b
22	0x8B7	0x8b7
23	0x8E3	0x8e3
24	0x917	0x91d
25	0x943	0x943
26	0x96F	0x96f
27	0x99B	0x99b
28	0x9C7	0x9c7
29	0x9F3	0x9f3
30	0xA1F	0xa1f
31	0xA4B

• Ch8 is 8 bytes longer
• Ch15 is 8 bytes longer
• Ch23 is 8 bytes longer

hexdump -s0x50b -n44 -C FIRST_AN.ICF

0000050b  31 34 35 35 30 30 31 34  36 36 30 30 30 30 43 30  |14550014660000C0|
0000051b  30 43 30 33 30 36 33 30  30 30 30 31 30 30 30 30  |0C03063000010000|
0000052b  0d 0a 30 32 30 30 31 30  30 30 46 46              |..02001000FF|
00000537

Watch the 14550014600 - Rx and Tx freqs of the first channel

Last channel is 31, let's try and pick it directly

hexdump -s$(printf "0x%X" $((0x50b + 29 * 0x2c + 3*0x8))) -n44 -C FIRST_AN.ICF

00000a1f  31 35 35 36 30 30 31 34  34 37 30 30 0d 0a 30 34  |155600144700..04|
00000a2f  30 30 31 30 38 30 30 38  30 30 30 33 30 32 33 30  |0010800800030230|
00000a3f  30 30 30 31 30 30 30 30  30 30 46 46              |0001000000FF|
00000a4b

Channel in details

Rx/Tx frequencies are going one by one. Power bit for ch1 is 0x51e. 19th position, offset 0x13

cd ~/src/radio/IC-F300
binwalk -i -t -W L1N14480.ICF L2N14480.ICF N144800.ICF

OFFSET      L1N14480.ICF                                                         L2N14480.ICF                                                         N144800.ICF
--------------------------------------------------------------------------------
*
0x00000510  30 31 34 34 38 30 30 38 30 30 38 30 30 30 31 30 |0144800800800010| \ 30 31 34 34 38 30 30 38 30 30 38 30 30 30 32 30 |0144800800800020| \ 30 31 34 34 38 30 30 38 30 30 38 30 30 30 33 30 |0144800800800030|
*

Modulation width for ch1 is 0x523. 24th position, offset 0x18

binwalk -i  -W 144800.ICF N144800.ICF

OFFSET      144800.ICF                                                           N144800.ICF
--------------------------------------------------------------------------------
*
0x00000520  32 33 30 30 30 30 31 30 30 30 30 0D 0A 30 32 30 |23000010000..020| \ 32 33 30 38 30 30 31 30 30 30 30 0D 0A 30 32 30 |23080010000..020|
*