MTH DCS

I have the same question. I was able to find some, if not all, of the added features and bug fixes for some of the versions of the DCS software. They can be found at this site.

http://www.rayman4449.com/DCS_Tips.htm

Just scroll down till you find the DCS Software section.  This may not be complete, I have no way of knowing, but it is some information.

the website doesn't say what the upgrades do or solve)

Really??

From the MTH Protosound2.com web site:

DCS 4.20 Upgrade Revision Available

December 21, 2010 - The latest version (4.20) of the software used in the DCS system includes several new features detailed below. The software can now be downloaded from the M.T.H. Proto-Sound 2.0 Website.

Because the memory assignments are dramatically different in software Versions 3.X and earlier, upgrading the code is required in both the remote and the TIU. The system will not function correctly if only one of the two components has been updated. In addition, if the remote and the TIU are currently running any version of 2.X DCS software, both must be reset using the appropriate System menu commands prior to uploading the Version 4.01 software into the remote and the TIU. By resetting both components, all previous information and settings (engines, accessories, switches, etc.) entered into the remote and TIU will be lost and must be reentered by the user after the software update has been completed. Users upgrading from 3.X and higher will not have to reset the remote and TIU prior to uploading the new 4.00 software.

There are two software files attached to the download. Both feature the same numeric code and should be used together (the appropriate file for the remote and TIU) when migrating from Version 3.X or earlier.

The user should use the most recent DCS Loader Program, Version 2.20 to upload Version 4.20 into the TIU and Remote. Earlier versions of the DCS Loader Program prior to version 2.20 will not function with the Version 4.20 code.

Version 4.20 New Features

• Adds support for larger engine board memory sizes (4MB or larger). The engines that use these new boards are the PS3.0 HO Diesels and the PS3.0 Steam/Diesels.
• Adds support for HO Pantograph operation.
• When loading either a PS3.0 HO Steam/Diesel or a PS3.0 Steam/Diesel engine you MUST have DCS 4.20 software installed in your TIU.

Version 4.10 New Features

• Recover Engine – Allows you to recover an engine that has lost its address
• Engine in Remote Message – prompts you with a message if the engine you are trying to add already exists in the remote

You'll find complete instructions for installing and using the DCS 4.10 Features by clicking HERE.

Version 4.10 Fixes

• Corrects bug in engine add routine
• Read feature reliability improved
• Engine add routine improved to increase reliability
• If running the remote in Speed Operating mode – The remote will switch to Normal Operating mode when performing operations that require two-way communication with the TIU/Engine then switch back to Speed mode
• Corrects sticky relay issue on AIU

Version 4.00 History Of Features & Fixes

Version 4.00 New Features

• Recover Engine – Allows you to recover an engine that has lost its address
• Engine in Remote Message – prompts you with a message if the engine you are trying to add already exists in the remote
• All mode includes MTH lash-up control
• Boost/Brake settings can be set to stay instead of always returning to zero
• Ability to play quillable Proto-Whistle Sounds (locomotive dependent)
• Adds Speed mode to remote to increase command throughput
• Adds Auto-Coupler Slack sound
• Adds Double-tap brake to send engine speed to 0 SMPH
• Adds TMCC Lash-up capability
• Adds Relative Speed control in TMCC mode
• Adds ALL Track control to TIU and Z4K Tracks
• Adds two softkeys for ALL Tracks to allow one-button power on/off of your Z4K and TIU tracks (TSV/TZV softkeys)
• Adds Remote Power down timer from 1-60 minutes
• Adds Remote Cloning Feature (requires Data Loader.exe)
• Adds Quickset Speed

Version 4.00 Improvements

• Improves TMCC interface on DCS Remote
• Improves Super TIU mode operation
• Improves E-Stop functionality in Track Mode
• Sped up Master Volume +/- operation
• Improves Remote Messages On/Off operation
• Improves Reset Remote feature

Version 4.01 Additions

• A Hold message is now displayed on the remote LCD when resetting a TIU

Version 4.01 Fixes

• Variable 1 on Rev G TIU not having any voltage output or DCS signaling
• When exiting PFA playing two coupler slack sound if the speed is changed
• Boost from 0sMPH would not play coupler slack
• Engine 99 is missing from Engien List - This can only be corrected if the remote is Reset. Cloning the remote will not restore engine #99
• AIU switch relays sticking intermittently
• ACC/DEC Rates changing intermittently when using Boost/Brake

Version 4.02 Fixes

• Corrects missing engine at address #1. Requires Remote reset to get engine location restored
• Corrects PFA Lash-up issue. Previously, the head engine would pull away at the end of the PFA sequence while the trailing engines would not move

DCS 4.00 & Later Operating Instructions

HERE

Previous DCS Software Release Features

CLICKING HERE

As always, you'll find the 4.20 download FREE by clicking HERE.

Thank you sir, it didn't come up so easily for me and I'm supposed to be working! Sounds like I should do the upgrades before running my P3's 

Charlie,

but when you look at the website it say nothing about revision notes, bug fixes, enhancements. I believe I found this by accident by clicking on every text link in the site. But the link that you displayed just says DCS Version 4.20, above says click for description. So you have to know what is there before you click it or you have to read everything on the web site to find it. 

What's so difficult? It's all right in front of you:

• Got to www.protosound2.com
• Look at the table "DCS Software Updates:"
• Look at the line in the table:

  Date              File Name               Description                 Release

                                               (Click for Description)          Date

"12/21/2010   DCS Version 4.20        DCS Version 4.20         Download Now!"

• Click on either of the underlined links, either in the table or above.

Nope he's right if you have a question on ps3 go to a site for ps2. Come on guys wheres the love ! The whole point of a forum is to talk to people to avoid hours of googling.  We we are all experts with the internet but is not the whole point of a forum to have a discussion? I think you need to review the point of having a forum, it's to share knowledge not to to show me you  know where the information is.