|the pro fx-1 is a rather unique machine and the big daddy
of the fx-201p & fx-202p
family. as far as i am aware, it is the only casio model with a magnetic
card read/writer, presumably the source of the pro moniker.
functionally, it is the same as the fx-201p,
but unlike the fx-202p, does not have the memory backup batteries; the
card reader replaces this. the number fx-1 is rather strange, maybe
this should be the pro fx-201 because there was already an fx-1
model. perhaps this was meant to be the first of a new range of pro mag
card enabled models. but casio did not return to magnetic storage until
much later with the fx-502p and fx-501p which
used a cassette interface rather than a card reader.
the build is solid and the extra headroom for the card reader means
that this model makes even the 201 look small. there is an additional led error
indicator (for read/write errors) and an extended middle switch adding read,
record and check selectors onto manual, comp
and write. the six position switch a throwback to the al-8.
unfortunately, it still only has 127 steps like the others. it would
have been rather cool to have had perhaps twice the memory and mag card
unlike hewlett packard models, like the hp65,
the card reader is not motorised, you simply draw the card through the
slot from left to right. this is quite a neat idea although (like hp) the
batteries need to be strong to operate the writer. like the other models,
the unit is powered by 4 AA cells.