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    Then again, the 4P was meant as professional machine, like an Osborne or Kaypro, not a home computer. Commented Aug 23, 2020 at 22:06
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    Also the Heath H-89 and other computers that could run CP/M. Commented Aug 23, 2020 at 23:29
  • Note that the Apple had two different BASICs. The original cassette basic was named Integer Basic. The later models switched to a port of Microsoft BASIC in ROM. It's outlined well at en.wikipedia.org/wiki/Integer_BASIC Commented Aug 25, 2020 at 17:53
  • @GregSmith you are referring to the Apple II, not the Apple 1, which had only a machine-language monitor in its (256 bytes!!) of ROM. The Apple 1 Cassette Interface included a second 256-byte program which could run the cassette functions. Those are the only two ROMs ever shipped by Apple for the Apple 1 in its short life. Commented Dec 11, 2022 at 19:45