I think from what I remember reading is that the max baud rate for the v3 was 57.600 but port D0 could get up to 115.200, where as the v4 can deliver 115.200 on all 24 digital ports.

I believe that's correct and hope it helps. I'll try and find the thread where I saw it and post a link.

Well it does 115200 on D0 because that is the Roomba control port. The rest are a lower rate something like 57600... Either way it can do way faster than 9600 that's for sure... What are you trying to connect it to any way?

I found the thread I saw this info on, and posted the link below.

synthiam.com/Community/Questions/5412

And just confirm it, the link below is from the EZ-B v3 support page where it mentions the baud rate it can use (scroll about half way down the page).

synthiam.com/Tutorials/EZ-Bv3.aspx

Thank You ALL. You ALL deserve the credit.

No problem. I just added another link to the post above that mentions about what baud rates the v3 can use.