The A4000 originally came in a white desktop box with a separate keyboard.
There was also a tower version called the A4000T, produced in small numbers.
Features of the desktop version:
The tower version was the only Amiga ever to have both SCSI and IDE interfaces built-in on the motherboard. Having driver software for both interfaces on the ROM meant that some other parts of AmigaOS had to be moved from the ROM, and thus the A4000T is the only machine to have the file "
workbench.library" stored on disk. It was also the only Amiga to use a PC form factor for the motherboard, and the first (and only) to use a Lithium Ion backup battery instead of a NiCd.
This was the final "big-box" machine to be put out by Commodore International. Only a couple hundred 4000T's were produced before the whole company folded. Production of the 4000T's was restarted after ESCOM bought the AMIGA assets. The ESCOM-manufactured 4000T's had minor differences with the old one, including the substitution of the high density floppy drive with a double density one.
The A4000 designation was also used on an Acorn Archimedes model.