H89 assembled or never assembled?

Yes. I guess what you cal lthe 'drive electronics board' is what I called the 'monitor PCB' -- the one flat i nthe bottom of the case thqt contains the defleciton circuitry, etc. I am pretty sure that di come as a bare PCB, and that the logic board, the one with the Z80, etc, on it, came ready-built and tested I have a Z90, ehivh id muvh the same machine as the h89, except that it came compleletelyu assembled and had exra options installed at the factory. Some of the docs I have really apply to the kit version, but of course the scheamtics, etc, are the same. I am told that toewards the end of the Heathkit era, they started selling computer 'kits' which rwere reall what is now called 'building a PC'. That is, screw the motherboard i nteh case, screw the PSU in, screw the drives in, plug in the cables. No soldering at all. And worse, no schematics (at least wit hthe H19, H89, etc you did get schematis of the pre-built boards). -tony