Vintage Casio FX-502P Scientific Programmable Calculator from '80 *RARE*See original listing
10 Jul, 2012 06:16:45 BST
£12.00 Standard Delivery from outside UK | See details
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Drobeta Turnu Severin, Mehedinti, Romania
Used: An item that has been previously used. The item may have some signs of cosmetic wear, but is fully ... Read moreabout the condition
This FX-502P is a programmable calculators, manufactured by CASIO from 1978. They were the predecessors of the Casio FX-601P and Casio FX-602P.
The item is in very good condition and works! Please see the picture. It will comes with special overlay and international conversions sheet.
Information, manuals, and free programs can downloaded free at: Casio FX-502P Geek.
The FX-502P series use the algebraic logic as was state of the art at the time.
The FX-502P featured a single line 7-segment liquid crystal display with 10 digits as main display. An additional 3 digits 7-segment display used to display exponents and program steps when entering or debugging programs and 10 status indicators. The display was covered with a yellow filter, supposedly to prevent ultra-violet radiation damage.
Programming The programming model employed was key stroke programming by which each key pressed was recorded and later played back. On record multiple key presses were merged into in a single programming step. All operations fitted into one program step. The FX-502P can store 256 steps, with 22 memory registers. Conditional and Unconditional jumps as well as subroutines where supported. The FX-502P series supported 10 labels for programs and subroutines called P0.. P9. Each program or subroutine could have up to 10 local labels called LBL0.. LBL9 for jumps and branches. The FX-502P supported indirect addressing both for memory access and jumps and therefore the programming model could be considered Turing complete. Since the FX-502P only employed a Seven-segment display each program step was represented by a special 2 digit codes made op of the digits 0.. 9 and the character C, E, F and P. The Calculator came with a special overlay so the user need not memorize the mapping between code and actual command.
I believe it was the top of the range Casio calculator at the time. Information, manuals, and free programs can downloaded free at: Casio FX-502P Geek.
Thank you for your interest in this vintage Casio Scientific Programmable Calculator.