Firstly, a big thank you and kudos to whoever created the NEC Compatibility Guide (https://www.pcengine-fx.com/main/nec_compatibility_guide.html).
When I first started to gain an interest in the PC Engine, all the hardware variances were very confusing and frustrating. This guide helped me understand a great deal of information in a very short amount of time, it's a work of art.
I'd like to suggest a small amendment. Under the "JAPANESE RELEASED CONSOLE ADAPTERS" the "Super CD-ROM2 Unit" does not mention compatibility with the original white PC Engine console. I think it should, as it is compatible.
Hi - thanks for the comment on my guide! I am glad you found it helpful. Thanks for the amendment - I'll make sure to add it to the guide next time I update it.