but one more time to come back on-topic. i just can't believe that NEC almost didn't anything concerned the PCE hardware-developement, since they where some of the pioneers for many electronic inventions just as CD-ROM used for data-storage, Plasma-screens for notebooks etc. which also was used in many add ons.
so even Hudson brought the idea and hardware recommendees for the design the engine, i still believe that NEC was the manufcturer of it, as well as the main-inventor for further adds just as CD-ROM, GT, LT, Duo Monitor etc.
2nd: i still don't think, many of the users recognized that Hudson was taking over a major part in the PCE development just because the HE-System. Hudson as a real brand was never shown on any of the PCE hardware units, on the contrary of the brand NEC. hudson only was well known as a software developer and inventor of the card-media (HuCrad, MSX bee-card).