XTS 2500

I was just given an XTS2500 to test P25 with, but of course it would not accept the ham bands on 900 MHz. This required editing the values in the PatPort.exe file in the Astro 25 Portable programing software. I've not tried the Tuner, but assume it would be the same.

Changes to ParPort.exe

For 20.01.00

Offset	Original Frequency	Original Hex	New Frequency	New Hex
0x1200CE8	901,987,500	AC3C C335	907,987,500	2CCA 1E36
0x1200DDC	935,012,500	9428 BB37	926,012,500	54D4 3137
0x1200ECC	935,012,500	9428 BB37	926,012,500	54D4 3137
0x1200F1C	935,012,500	9428 BB37	926,012,500	54D4 3137
0x120134c	935,012,500	9428 BB37	926,012,500	54D4 3137
0x120139c	935,012,500	9428 BB37	926,012,500	54D4 3137

Feel free to put the new frequencies to what ever you want, but I've chosen here to give the standard 25 MHz ham split. I'm not sure what is the Talk Around and normal tables here, but if you find it please add to this wiki.

For OOB FPP to work the code must be changed in patport to cause the bytes to not be re-written. 0x3df2e5 - change 74 to EB

Any FPP band edges modified using flash zap will then work after programing with CPS.

FPP is kinda gay though.

Changes to ParMob.exe

For 20.01.00 Mobile CPS.

Offset	Original Frequency	Original Hex	New Frequency	New Hex
0x139D718	901,987,500	AC3C C335	907,987,500	2CCA 1E36
0x139D80C	935,012,500	9428 BB37	926,012,500	54D4 3137
0x139D8FC	935,012,500	9428 BB37	926,012,500	54D4 3137
0x139D94C	935,012,500	9428 BB37	926,012,500	54D4 3137
0x139DD7C	935,012,500	9428 BB37	926,012,500	54D4 3137
0x139DDCC	935,012,500	9428 BB37	926,012,500	54D4 3137

Blocks

FlashZap reads out in decimal numbers.

FDB block 4100 is the serial/model number.

0x052/0x53 (82/32d) are the FPP band limits.

Example blocks:

82d  - Receive Range
	        | Multiply the long by this to get frequency in Hz
00 00 00 08 00 05 00 01 < one range
0B256E84  0B37AA7C      - 935,012,500 - 940,987,500 
CF 60

83d - TX Range, Primary and Talk around
                | Multiply the long by this to get frequency in Hz
00 00 00 08 00 05 00 02 < two Ranges
0AAE69C4 0AC0A5BC       - 896,012,500 - 901,987,500
0B256E84 0B37AA7C       - 935,012,500 - 940,987,500
4A 12                   - Checksum

To cover the hamband I'll come down 2 MHz from either edge:

82d
0B09ED80  0B37AA7C     - 926,000,000 - 940,987,500

83d 
0AAE64E2 0AC6CA00      - 896,006,250 - 904,000,000
0B09ED80 0B37AF5E      - 926,000,000 - 940,993,750

Be sure to recalc the block checksum after changing each. If you hit the radio with a non-modified CPS you will revert these changes.