this is a very strange and pioneering casio
data bank calculator. in the early days the means of operating a personal
database were unclear and the pf-8000 represents an early foray into
the touchpad on the right is pressure sensitive and is overlaid with a
grid to delimit an array of normal calculator functions. furthermore this
touch area can be used to enter numbers and text by drawing the symbol
itself, rather like palm pilot jot. each character is drawn in a
particular way and the shape and direction required is depicted on the
inside of the cover.
internally the machine takes 3 batteries. 2xCR2032 for the main power
and 1xCR1220 to maintain the internal memory. there is also a removable
memory module, the casio or-20 which contains 2k of ram and an internal
buzzer. there is a contrast adjustment knob on the top right of the case.
the machine overall is very neatly made.
the calculator operates to ten digits, but requires a digit to display
the decimal point. the display is LCD with 12 digits of 8x5 dot matrix.
the databank capabilities are a phone book and a memo list, these can
be scrolled with keys or searched using the touchpad. there is a secret
mode where information can be locked with a 4 character combination.
the calculator is remarkably fast at displaying numerical answers,
although slow with data. i wondered if this was due to a faster than usual
processor being required to perform the pattern recognition.
have asked me about the manual for this and its operation. i used to have
one and knew how it all worked, because i used to use this machine to
store information. at some point i will sit down with it and try to figure
it all out again. i think i have lost the manual. when i do, i will write