MD-380 .rdt file Memory Map

[csidmr] .rdt file memory map

I have been writing the Zone Manager program and as a consequence had to re-created the memory map notes. I have now uploaded them to the yahoo.com user group [csidmr] files area. 

This is far from a complete document. Only parts of the memory map have been decoded. But it should prove a starting point for anyone wanting to investigate further. 

The format is valid for the original CS700 firmware and the MD380 firmware. It almost certainly is not correct for the CS700A or CS750. 

I am not able to answer questions on this document. If you don't understand it then you probably shouldn't be playing about with .rdt files. There is a risk of bricking your radio if you do.

Partial memory map of the contents of a .rdt file. Reverse engineered from MD380 but the CS700 is the same. (not CS700A or CS750).

CS700 .rdt file Memory Map

Offset​Function​bytes per entry​Number of entries​Last Offset

061A5​Contacts​36​1000​0EE44

0EE45​Rx Groups​96​250​14C04

14C05​Zones​64​250​18A84

18A85​Scan Lists​104​250​1F015

1F015​Unknown​16 (all FF)​1​1F024

1F025​Channels​64​1000​2EA24

Contacts (36 bytes per entry)

Byte​function

0​ID low byte​FF if blank

1​ID mid byte​FF if blank

2​ID high byte​FF if blank

3​Type      C0=blank C1=Group C2=Private C3=All   (Ex=Call Tone)

4​Name Low byte of first character

5​Name High byte of first character

6-35​Name, remaining 15 characters.

Rx Groups (96 bytes per entry)

Byte​function

0​Name Low Byte of first character 

1​Name High Byte of first character 

2-31​Name, Remaining 15 characters

32​Index number of Contact Low Byte

33​Index number of Contact High Byte

34-95​Index numbers of remaining Contacts (up to 32entries 2 bytes per entry)

Zones (64 Bytes per Entry)

Byte​function

0​Name Low Byte of first character 

1​Name High Byte of first character 

2-31​Name, Remaining 15 characters

32​Index Number of Channel Low Byte

33​Index Number of Channel High Byte

34-63   Index Numbers of remaining channels (up to 16 entries 2 bytes per entry)

Scan Lists (104 Bytes per Entry)

Byte​function

0​Name Low Byte of first character 

1​Name High Byte of first character 

2-31​Name, Remaining 15 characters

32-39​Unknown (probably Priority Chans and hold times)

40​Index number of Channel Low Byte

41​Index number of Channel High Byte

42-103​ Index numbers of remaining channels (up to 32 Entries 2 bytes per channel)

Channels (64 Bytes per Entry)

Byte​function

00​0x61=Analogue 0x62=Digital

01

02

03

04​Power Level H=0x24  L=0x04

05

06​Contact Index Low Byte

07​Contact Index High Byte

08

09

10

11

12​RX Group Index

13

14

15

16​Rx Freq Low   100hz, 10 hz​BCD

17​Rx Freq ​10 khz, 1khz​BCD

18​Rx Freq​1 mhz, 100khz​BCD

19​Rx Freq​100 mhz, 10 mhz​BCD

20​Tx Freq Low   100hz, 10 hz​BCD

21​Tx Freq ​10 khz, 1khz​BCD

22​Tx Freq​1 mhz, 100khz​BCD

23​Tx Freq​100 mhz, 10 mhz​BCD

24

25

26

27

28

29

30

31

32​Name Low Byte of first character 

33​Name High Byte of first character 

34-63​Name, Remaining 15 characters

THANK TO :::  

73 Colin G4EML

Posted by: colin@durbridg

[csidmr] .rdt file memory map

The file sits in the yahoo.com user group [csidmr]

cs800 .rdt file memory map, cs700 .rdt file memory map, cs750 .rdt file memory map

You can access this file at the URL:
https://groups.yahoo.com/neo/groups/csidmr/files/Programming%20Software%20and%20Guide/rdt%20file%20format.doc