Oh god the repressed memories. I believe there was a SCSI thingy to do some basic sysex (or whatever format they were using) and presets save/load from 68K macintoshes?
For the A-samplers? There are a number of tools out there for manipulating the A-sampler data with a PC - I wrote one of them (DiskY) which makes filesystem management over SCSI with a Windows PC a lot smoother/faster than using the onboard OS, and there is also b.Zone, which is an editor that uses MIDI CC and Sysex to do editing.
Together, they make the A-sampler .. almost .. usable. ;)
I would love to dig further into the A-sampler ROM and figure out a few more of its secrets. I'd especially like to know the exact reason why the A-samplers SCSI subsystem is .. so .. darn .. slow .. so maybe there's a chance to dig into this at some point.
Can't remember to save my life if it was a TX 802 or an A-Series Sampler to be honest. Probably the latter because I fully remember the grating loading times.