The system uses AT89S52 as the control core. The system consists of 4* 4 matrix input device, cpu parts as well as through an 8-bit digital tube display dynamic scan 0-F 16 digits. Input is controlled by the composition of 16 key switches cpu in part by the 51 microcontroller, crystal pieces, as well as capacitors etc. display by an 8-bit 7-segment decoder tubes and resistors composition.

4个独立键盘
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...........\11.c
...........\11.hex
...........\11.lnp
...........\11.LST
...........\11.M51
...........\11.OBJ
...........\11.plg
...........\11.uv2
...........\22
...........\22.c
...........\22.hex
...........\22.lnp
...........\22.LST
...........\22.M51
...........\22.OBJ
...........\22.Opt
...........\22.plg
...........\22.Uv2
...........\22_Opt.Bak
...........\22_Uv2.Bak
...........\STARTUP.A51

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