I have an original 128k Mac which I bought in June of 1984. Are there any resources to help find the original system software and info on making internal adjustments to the CRT?
Information can also be found via a site such as 68kmla.org. However, please note that any work inside a compact Macintosh computer is dangerous because of the high voltages involved, and must be performed by someone with the necessary qualifications.
That Macintosh used 3.5" 400 KB floppy discs, formatted using the MFS filesystem. (This was a flat filesystem that had no subdirectories. Folders were just Finder illusions.)
You will not be able to read or write those discs on anything other than an old Mac that has an Apple-brand floppy drive, and that is running something earlier than System 7. Apple used a special chip (the Integrated Woz Machine, or IWM) to get 400 KB onto the disc where a 3.5" PC floppy drive (uncommon at the time) would have gotten only 360 KB.
A YouTube video you might have an interest in…
if it was me then I would look for
Is Macintosh System Software 1.0 (Classic MacOS) Free? - Ask Different
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original 128k mac original system software download - Google-
What sort of CRT adjustments do you need to accomplish?
I'd seriously try to avoid that. Yoke adjustments for example are extremely tedious, besides, once aligned properly readjustments should never be required for the life of the monitor. The CRT is degaussed automatically every time you turn it on. Of course if that isn't happening, it needs to be fixed before aligning anything.
If that's what you need to accomplish though, there are many online resources and they're not Mac-specific.
Support for original 128 k Macintosh
