CASIO PF-7000 Data Bank Super Memory-ComputerThe manufacturing dates for this model are not well established as of 2016.
Probably the production started in 1983, but it must lasted at least until 1986, because my machine was made in Japan on 1986, April (see below).
My machine has IC's date codes from 1985 (September for the Processor and August for the two RAM chips).
The machine serial number is 6D308A. Assuming a date code of y-m-nnnn, my machine was manufactured in 1986, April, which is possible considering the IC dates.
The few that survived probably will not work anymore, mostly having defective keyboards.
This is a pocket organizer store telephones and memos, along with a basic calculator, measuring just 11x108x65mm when folded.
Why "Super Memory-Computer"?
Well, CASIO designed it with 2KByte of RAM. That was a substantial amount of memory back in 1983 for a pocket machine.
Power switch and contrast adjustment.
It runs at 6.3VDC from two CR2025 battery cells in series.
One additional CR1220 for memory backup.
Power consumption: 0.01Watt (1.6mA)
Separating the vinyl cover/keyboard from the main body.
A zebra interface connects the keyboard connector to the main PCB.
2 x HD61914C 1KByte SRAM (date code 1985)
1 x HD61748 B01 SoC Processor (date code 1985)