Using VHDL in quartus2 achieve calculator. Input 4* 4 matrix keyboard, the output data lines for sharing of digital control. Can achieve a simple mathematical operations, logical operations, binary conversion, continuous operations and other functions.

calculator-advanced\alu.bsf
...................\alu.vhd
...................\alu.vhd.bak
...................\calculator.asm.rpt
...................\calculator.bdf
...................\calculator.cdf
...................\calculator.done
...................\calculator.fit.rpt
...................\calculator.fit.smsg
...................\calculator.fit.summary
...................\calculator.flow.rpt
...................\calculator.map.rpt
...................\calculator.map.summary
...................\calculator.pin
...................\calculator.pof
...................\calculator.qpf
...................\calculator.qsf
...................\calculator.qws
...................\calculator.sof
...................\calculator.tan.rpt
...................\calculator.tan.summary
...................\calculator_assignment_defaults.qdf
...................\db\calculator.asm.qmsg
...................\..\calculator.asm_labs.ddb
...................\..\calculator.cbx.xml
...................\..\calculator.cmp.bpm
...................\..\calculator.cmp.cdb
...................\..\calculator.cmp.ecobp
...................\..\calculator.cmp.hdb
...................\..\calculator.cmp.kpt
...................\..\calculator.cmp.logdb
...................\..\calculator.cmp.rdb
...................\..\calculator.cmp.tdb
...................\..\calculator.cmp0.ddb
...................\..\calculator.cmp2.ddb
...................\..\calculator.cmp_merge.kpt
...................\..\calculator.db_info
...................\..\calculator.eco.cdb
...................\..\calculator.fit.qmsg
...................\..\calculator.hier_info
...................\..\calculator.hif
...................\..\calculator.lpc.html
...................\..\calculator.lpc.rdb
...................\..\calculator.lpc.txt
...................\..\calculator.map.bpm
...................\..\calculator.map.cdb
...................\..\calculator.map.ecobp
...................\..\calculator.map.hdb
...................\..\calculator.map.kpt
...................\..\calculator.map.logdb
...................\..\calculator.map.qmsg
...................\..\calculator.map_bb.cdb
...................\..\calculator.map_bb.hdb
...................\..\calculator.map_bb.logdb
...................\..\calculator.pre_map.cdb
...................\..\calculator.pre_map.hdb
...................\..\calculator.rtlv.hdb
...................\..\calculator.rtlv_sg.cdb
...................\..\calculator.rtlv_sg_swap.cdb
...................\..\calculator.sgdiff.cdb
...................\..\calculator.sgdiff.hdb
...................\..\calculator.sld_design_entry.sci
...................\..\calculator.sld_design_entry_dsc.sci
...................\..\calculator.smp_dump.txt
...................\..\calculator.syn_hier_info
...................\..\calculator.tan.qmsg
...................\..\calculator.tis_db_list.ddb
...................\..\calculator.tmw_info
...................\..\calculator_global_asgn_op.abo
...................\..\prev_cmp_calculator.asm.qmsg
...................\..\prev_cmp_calculator.fit.qmsg
...................\..\prev_cmp_calculator.map.qmsg
...................\..\prev_cmp_calculator.qmsg
...................\..\prev_cmp_calculator.tan.qmsg
...................\divider.bsf
...................\divider.vhd
...................\divider.vhd.bak
...................\incremental_db\compiled_partitions\calculator.root_partition.cmp.atm
...................\..............\...................\calculator.root_partition.cmp.dfp
...................\..............\...................\calculator.root_partition.cmp.hdbx
...................\..............\...................\calculator.root_partition.cmp.kpt
...................\..............\...................\calculator.root_partition.cmp.logdb
...................\..............\...................\calculator.root_partition.cmp.rcf
...................\..............\...................\calculator.root_partition.map.atm
...................\..............\...................\calculator.root_partition.map.dpi
...................\..............\...................\calculator.root_partition.map.hdbx
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