Might help if you put in an explanation of what the 4.15 ROM does that the previous versions don't. I know people could Google it, but it does help to just display that info. If got a GVP RAM/SCSI board, but I couldn't tell you if that is the same as the "Combo Board" you mentioned or not.
I've given GVP owners a little more credit for having greater knowledge about this topic than non-GVP owners. Also, this upgrade has been previously discussed here and on other forums just in case a Google search doesn't answer all your questions.
That being said, here's some more detailed info for you curiosity seekers:
- The 4.15 version is the latest ROM upgrade for GVP series II, Combo 030, G-Force 040 and A530 SCSI controller/accelerator cards.
- This version offers 4GB support and some minor performance/compatibility improvements (over previous versions).
- This version was never released by GVP. (It was released by Ralph Babel after GVP discontinued production of these SCSI controller/accelerator cards).