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Joined: Aug 2005
I don't think there ever was a production machine called an HP71. But it's not uncommon for the machines shown on the front of manuals/books to be slightly different from the machines that were
actaully sold. For example many of the HP75 solution books show a machine with a slightly different keyboard layout to the HP75s that were shipped.
From the PCB layouts and hardware IDS, it appears that a 4K HP71 was possibly planned. There's space on the PCB for a link to
complete the configuration chain if only 1 RAM hybrid is soldered to the PCB (instead of the 4 in every standard HP71B, giving 16K RAM). Perhaps a machine
with less memory was planned at one point.