Toshiba XR-Z90 - Any info?

Hi All, not been here for a while.

I picked up one of these players from a thrift store today for £20, and it sounds pretty decent (relatively speaking) a bit sharp on the top end, but a nice weighty bass :)

I know next to nothing about this unit, apart from it being 'rare', originally costing 255,000 Japanese Yen, is a vertical loader and that it was manufactured in 1983...

If anyone has any info regarding the chipset for this unit, that'd be great :D

(I probably won't keep hold of it for long, seems that there is a market for these, one for sale at the moment for €599 / £317!!)