David Cook
Well-known member
I recently came across a trove of interesting documents on Internet Archive. One of the documents seems very relevant to this thread. It is an internal document from Apple, published in 1989, documenting an effort to clean up and consolidate the ROM codebase into a single Universal ROM. It's a nice little discussion of what they were working to improve and a nice rundown of issues with prior releases:
Given the date of the document, and the fact that those machines are not mentioned, I suspect the document is talking about work that was being done for the IIci and IIfx.
Very cool