Copy bin from NVRam & burn to eprom

[Beaker]

Hi everyone,
Wondering if anyone can assist.
I have a VN 304, 808 ECU with USB Comms board and NVRam module.
All working fine and using the abundance of information on PCMHacking have made 2 tunes in MapA and MapB.
What I can't get my head around is how and what to save from the NVRam (using Flash Tool if I'm correct) and then burning it to Eprom.
I have the pin B9 wired ready for switching (switches ground for MapB).

What size Eprom do I require (being x 2, I assume 32K - I have 16's, 32's and 64's) - I use them for work so that's a bonus.
What do I save from the NVRam so I have both tunes (A and B) in the correct address areas (offsets if required) ?

Any help mutely appreciated.

[antus]

Use the delco ose flash tool and do a get bin. This will read the whole thing and give you a bin file that includes calibration and operating system. It'll be 32kb. You can use 32Kb eeprom, just write it as is. Or you can use 64Kb, just leave the first half empty. You might put a 32Kb file of FF, or 00, or two copies of the bin, and only the second one will be used and the first is filler (also known as stacking). The bin B9 switch is implemented in software, not hardware so you'll get MAP A and MAP b in the one hit as a single file to burn.

[Beaker]

Thankyou very much Antus,

I was going crazy reading all the threads but it's ultimately really easy
Thanks for your quick response.