verilog4* 4 keyboard scan codes source file, there is debounced, verify available.

keyscan
.......\db
.......\..\keyscan.amm.cdb
.......\..\keyscan.asm.qmsg
.......\..\keyscan.asm.rdb
.......\..\keyscan.asm_labs.ddb
.......\..\keyscan.cbx.xml
.......\..\keyscan.cmp.bpm
.......\..\keyscan.cmp.cdb
.......\..\keyscan.cmp.hdb
.......\..\keyscan.cmp.kpt
.......\..\keyscan.cmp.logdb
.......\..\keyscan.cmp.rdb
.......\..\keyscan.cmp0.ddb
.......\..\keyscan.cmp1.ddb
.......\..\keyscan.cmp2.ddb
.......\..\keyscan.cmp_merge.kpt
.......\..\keyscan.db_info
.......\..\keyscan.eda.qmsg
.......\..\keyscan.fit.qmsg
.......\..\keyscan.hier_info
.......\..\keyscan.hif
.......\..\keyscan.idb.cdb
.......\..\keyscan.lpc.html
.......\..\keyscan.lpc.rdb
.......\..\keyscan.lpc.txt
.......\..\keyscan.map.bpm
.......\..\keyscan.map.cdb
.......\..\keyscan.map.hdb
.......\..\keyscan.map.kpt
.......\..\keyscan.map.logdb
.......\..\keyscan.map.qmsg
.......\..\keyscan.map_bb.cdb
.......\..\keyscan.map_bb.hdb
.......\..\keyscan.map_bb.logdb
.......\..\keyscan.pre_map.cdb
.......\..\keyscan.pre_map.hdb
.......\..\keyscan.rtlv.hdb
.......\..\keyscan.rtlv_sg.cdb
.......\..\keyscan.rtlv_sg_swap.cdb
.......\..\keyscan.sgdiff.cdb
.......\..\keyscan.sgdiff.hdb
.......\..\keyscan.sld_design_entry.sci
.......\..\keyscan.sld_design_entry_dsc.sci
.......\..\keyscan.smart_action.txt
.......\..\keyscan.sta.qmsg
.......\..\keyscan.sta.rdb
.......\..\keyscan.sta_cmp.8_slow.tdb
.......\..\keyscan.syn_hier_info
.......\..\keyscan.tis_db_list.ddb
.......\..\keyscan.tmw_info
.......\..\logic_util_heursitic.dat
.......\..\prev_cmp_keyscan.qmsg
.......\incremental_db
.......\..............\README
.......\..............\compiled_partitions
.......\..............\...................\keyscan.db_info
.......\..............\...................\keyscan.root_partition.cmp.cdb
.......\..............\...................\keyscan.root_partition.cmp.dfp
.......\..............\...................\keyscan.root_partition.cmp.hdb
.......\..............\...................\keyscan.root_partition.cmp.kpt
.......\..............\...................\keyscan.root_partition.cmp.logdb
.......\..............\...................\keyscan.root_partition.cmp.rcfdb
.......\..............\...................\keyscan.root_partition.map.cdb
.......\..............\...................\keyscan.root_partition.map.dpi
.......\..............\...................\keyscan.root_partition.map.hbdb.cdb
.......\..............\...................\keyscan.root_partition.map.hbdb.hb_info
.......\..............\...................\keyscan.root_partition.map.hbdb.hdb
.......\..............\...................\keyscan.root_partition.map.hbdb.sig
.......\..............\...................\keyscan.root_partition.map.hdb
.......\..............\...................\keyscan.root_partition.map.kpt
.......\keyscan.asm.rpt
.......\keyscan.done
.......\keyscan.eda.rpt
.......\keyscan.fit.rpt
.......\keyscan.fit.smsg
.......\keyscan.fit.summary
.......\keyscan.flow.rpt
.......\keyscan.map.rpt
.......\keyscan.map.summary
.......\keyscan.pin
.......\keyscan.pof
.......\keyscan.qpf
.......\keyscan.qsf
.......\keyscan.sof
.......\keyscan.sta.rpt
.......\keyscan.sta.summary
.......\keyscan.v
.......\keyscan.v.bak
.......\simulation
.......\..........\modelsim
.......\..........\........\keyscan.sft
.......\..........\........\keyscan.vo
.......\..........\........\keyscan_fast.vo
.......\..........\........\keyscan_modelsim.xrf
.......\..........\........\keyscan_v.sdo
.......\..........\........\keyscan_v_fast.sdo

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