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It's missing but "mame dmv -slot6 c3282 -hard1 615-4-17_ncrdmv.chd -slot1 k208" worked for me.

Sorry I forgot to include that file ... my dmv.bat is somewhat more elaborate

mess -window dmv -slot1 k208 -slot3 k806 -slot4 c3282 -slot5 k803 -slot7 k234 -slot7a k235 -hard1 "\mame\media1\ncr\ncr dmv\Harddisk Images\615-4-17_ncrdmv.chd"

Edit this line for the name of your MAME/MESS executable and disk image location.

Thanks !

I've very recently got one of these that has those PROM chips on the fixed-disk controller socketed. Just have to figure how to get the main motherboard out so I can reach for them.

*Edit*
I see it's already been sorted. Still, I'd like to verify that they are indeed the same ones.

Also, none of the dropbox links in this thread works anymore. Is there some more up to date alternative?

The easiest way to determine if the ROMs match is to simply zip them and then check if the CRC32 matches what's in MAME. Or run ./mame -romident whatever.bin.

I know, I'm pretty well versed with how it can be done with hex-editors too, but first of all I need to actually dump the chips in my unit before I can check for similarities.

Oh, got it. I thought since you were asking about dropboxes and whatever that you already had dumped the chips.

Ah, no the question about links was mostly because it would be nice to have the technical reference manuals.

Ok, I have now dumped them.

From a binary compare, they are very similar to the ones on bitsavers, however there are a few addresses that contain differences in most of my ROMs:

* 0x0AE to 0x0B2
* 0x18F
* 0x2CE
* 0x2F9
* 0x2FD to 0x300

In addition to these, all three of my ROMs have an extra byte inserted at 0x301, shifting the remaining content by one byte compared to the bitsavers version. I am pretty confident that the one I have is a revision of the same microcode, but I am not 100% sure if it's an earlier or later revision. My card has an earlier serial number (12675 vs 13109), but the datecode on the chips of my card (sprint 1983) is also just a little later in general than the one on bitsavers.

*EDIT*
I had a bit of a look around on the bitsavers page, and my ROMs match the one in this directory: http://www.bitsavers.org/pdf/westernDigital/WD100x/WD1001_NCR_Decision_Mate_V/ Further looking on the different folders, it seems like all of the different cards there have either the one linked on page 12 of this thread, or the one I got.

On an earlier post there was a command for the RS232 which was named -bitbngr

dmv -slot1 k202 -slot3 k211 -slot7a k235 -bitbngr socket.127.0.0.1:10000 -window

but on actual mame271 i got an error: unknown option: -bitbngr