Regarding the SNES CD-ROM, there were at least three completely
different, seperate systems / formats:
1.) 16-bit Sony-Nintendo Play Station (1988-1991).
There was both an add-on and a standalone combined all-in-one console, which I posted in my OP.
2.) 16-bit Phillips CD-ROM (1991), an add-on only
3.) 32-bit Nintendo Disc / Philips CD-ROM XA (1992).
Sony was involved with this also. An add-on only (also in my OP)
There also seems to be various prototypes/mockups of each thus, it gets confusing!
prototype of the 16-bit Sony Play Station SNES CD-ROM addon.
patent of the 16-bit Sony/Nintendo Play Station combined standalone unit.
mock-up of the 32-bit Nintendo Disc
early EGM article on (i think) the 32-bit Nintendo Disk CD-ROM
another early EGM article, definitely on 32-bit Nintendo Disc
later EGM article on 32-bit Nintendo Disc
EGM article on Nintendo Disk years after it was canceled
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