I believe you are right...it WAS a hard limit but I believe it was addressed in win98se...the 512mb ceiling was an issue with the 1st edition of win98.
I got it running fine with 2gb but dos utilities running within windows weren't happy, and that is critical to the dat2wav software so I pulled the second 1gb stick out. I jockeyed things around in the PCI slots to get the video, sata raid and one of the usb busses on separate irq's...had to do some fooling in the bios but they're all separate. I'm going to be monitoring the results of the transfers using a Tascam US-224 and since that uses usb protocol I just felt better having the audio, video and hdd bussing on separate addresses.
I forgot to mention also that I'm using a 64mb 8x agp video card.
Now, I realize these specs don't sound impressive in today's world...I mean really...SINGLE core processor? Only ONE gb of ram? Video ram in the DOUBLE-digit mb range (rather than triple digit or into the gb range)? Really?? (yes I know I could be doing much worse...) But all that and a bag of chips running win98se...its just blistering fast and I think the sata raid stripe helps that too. Kinda fun to brush back up on my win98 chops.
Anyway, got the drive, cable and card from Jinn...stumbling through the whole scsi world since I was never too adept at that so I'll be sending you a pm, Don!
win98 had no problem pulling up a driver for the card, and the adapter is happy with the drive but windows can't find (nor can I find) a driver for the drive and I don't know if that matters or not, but my command string in dat2wav elicits a drive initialization error and I don't know if that has to do with win98 not being happy with the drive or if that is a firmware issue...
Almost there...I WILL say that the drive handles tapes just fine...I ran a cleaning tape through it a few times to make sure but the drive itself seems to be healthy!