achieved using Verilog 4 x 4 keyboard procedures, the Quartus II compiler on the adoption and successful

key_scan1
.........\com_digit.fit
.........\com_digit.hex
.........\com_digit.hif
.........\com_digit.mmf
.........\com_digit.ndb
.........\com_digit.pin
.........\com_digit.rpt
.........\com_digit.snf
.........\com_digit.v
.........\cout.hif
.........\cout6.bsf
.........\cout6.fit
.........\cout6.hex
.........\cout6.hif
.........\cout6.mmf
.........\cout6.ndb
.........\cout6.pin
.........\cout6.rpt
.........\cout6.snf
.........\cout6.v
.........\d.v
.........\db
.........\..\key_scan1.asm.qmsg
.........\..\key_scan1.cbx.xml
.........\..\key_scan1.cmp.cdb
.........\..\key_scan1.cmp.hdb
.........\..\key_scan1.cmp.tdb
.........\..\key_scan1.db_info
.........\..\key_scan1.eco.cdb
.........\..\key_scan1.fit.qmsg
.........\..\key_scan1.hier_info
.........\..\key_scan1.hif
.........\..\key_scan1.map.cdb
.........\..\key_scan1.map.hdb
.........\..\key_scan1.map.qmsg
.........\..\key_scan1.pre_map.cdb
.........\..\key_scan1.pre_map.hdb
.........\..\key_scan1.psp
.........\..\key_scan1.rtlv.hdb
.........\..\key_scan1.rtlv_sg.cdb
.........\..\key_scan1.rtlv_sg_swap.cdb
.........\..\key_scan1.sgdiff.cdb
.........\..\key_scan1.sgdiff.hdb
.........\..\key_scan1.sld_design_entry.sci
.........\..\key_scan1.sld_design_entry_dsc.sci
.........\..\key_scan1.smp_dump.txt
.........\..\key_scan1.syn_hier_info
.........\..\key_scan1.tan.qmsg
.........\..\key_scan1_cmp.qrpt
.........\decode47.v
.........\div_clk.bsf
.........\div_clk.fit
.........\div_clk.hex
.........\div_clk.hif
.........\div_clk.mmf
.........\div_clk.ndb
.........\div_clk.pin
.........\div_clk.rpt
.........\div_clk.snf
.........\div_clk.v
.........\key_scan.fit
.........\key_scan.hex
.........\key_scan.hif
.........\key_scan.mmf
.........\key_scan.ndb
.........\key_scan.pin
.........\key_scan.rpt
.........\key_scan.snf
.........\key_scan.v
.........\key_scan1.asm.rpt
.........\key_scan1.bdf
.........\key_scan1.cdf
.........\key_scan1.done
.........\key_scan1.fit
.........\key_scan1.fit.eqn
.........\key_scan1.fit.rpt
.........\key_scan1.fit.summary
.........\key_scan1.fld
.........\key_scan1.flow.rpt
.........\key_scan1.gdf
.........\key_scan1.hex
.........\key_scan1.hif
.........\key_scan1.map.eqn
.........\key_scan1.map.rpt
.........\key_scan1.map.summary
.........\key_scan1.mmf
.........\key_scan1.ndb
.........\key_scan1.pin
.........\key_scan1.ppl
.........\key_scan1.qpf
.........\key_scan1.qsf
.........\key_scan1.qws
.........\key_scan1.rpt
.........\key_scan1.snf
.........\key_scan1.tan.rpt
.........\key_scan1.tan.summary
.........\key_scan1.v
.........\key_scan1_assignment_defaults.qdf
.........\key_scan2.fit

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