This based on the FPGA development board NEXYS3 a verilog program, is a ps2 keyboard module, including detection and decoding module

PS2_keyboard\clkdiv.bld
............\clkdiv.cmd_log
............\clkdiv.lso
............\clkdiv.ncd
............\clkdiv.ngc
............\clkdiv.ngd
............\clkdiv.ngr
............\clkdiv.par
............\clkdiv.pcf
............\clkdiv.prj
............\clkdiv.stx
............\clkdiv.syr
............\clkdiv.twr
............\clkdiv.twx
............\clkdiv.unroutes
............\clkdiv.v
............\clkdiv.xst
............\clkdiv_envsettings.html
............\clkdiv_guide.ncd
............\clkdiv_map.map
............\clkdiv_map.mrp
............\clkdiv_map.ncd
............\clkdiv_map.ngm
............\clkdiv_pad.csv
............\clkdiv_pad.txt
............\clkdiv_summary.html
............\clkdiv_t.v
............\clkdiv_t_beh.prj
............\clkdiv_t_isim_beh.exe
............\clkdiv_t_isim_beh.wdb
............\clkdiv_t_stx_beh.prj
............\clkdiv_xst.xrpt
............\deshake.v
............\fuse.log
............\fuse.xmsgs
............\fuseRelaunch.cmd
............\ipcore_dir\coregen.log
............\..........\create_dcm.tcl
............\..........\tmp\_cg\_dbg\xil_199.in
............\..........\...\...\....\xil_199.out
............\..........\_xmsgs\cg.xmsgs
............\.seconfig\clkdiv.xreport
............\.........\PS2_decode_module.xreport
............\.........\PS2_keyboard.projectmgr
............\.........\PS2_keyboard_top.xreport
............\.........\PS_2_detect_module.xreport
............\..im\clkdiv_t_isim_beh.exe.sim\clkdiv_t_isim_beh.exe
............\....\.........................\isimcrash.log
............\....\.........................\ISimEngine-DesignHierarchy.dbg
............\....\.........................\isimkernel.log
............\....\.........................\netId.dat
............\....\.........................\tmp_save\_1
............\....\.........................\work\clkdiv_t_isim_beh.exe_main.c
............\....\.........................\....\clkdiv_t_isim_beh.exe_main.nt.obj
............\....\.........................\....\m_00000000000352031744_3004165309.c
............\....\.........................\....\m_00000000000352031744_3004165309.didat
............\....\.........................\....\m_00000000000352031744_3004165309.nt.obj
............\....\.........................\....\m_00000000003914166892_2858095548.c
............\....\.........................\....\m_00000000003914166892_2858095548.didat
............\....\.........................\....\m_00000000003914166892_2858095548.nt.obj
............\....\.........................\....\m_00000000004134447467_2073120511.c
............\....\.........................\....\m_00000000004134447467_2073120511.didat
............\....\.........................\....\m_00000000004134447467_2073120511.nt.obj
............\....\isim_usage_statistics.html
............\....\pn_info
............\....\temp\clkdiv.sdb
............\....\....\clkdiv_t.sdb
............\....\....\glbl.sdb
............\....\work\clkdiv.sdb
............\....\....\clkdiv_t.sdb
............\....\....\glbl.sdb
............\isim.cmd
............\isim.log
............\led_segment_displays.v
............\lifo.v
............\mux4AN.v
............\pa.fromNetlist.tcl
............\par_usage_statistics.html
............\planAhead.ngc2edif.log
............\........._run_1\planAhead.jou
............\...............\planAhead.log
............\...............\planAhead_run.log
............\..............2\planAhead.jou
............\...............\planAhead.log
............\...............\planAhead_run.log
............\...............\PS2_keyboard.data\cache\PS2_keyboard_top_ngc_f656100b.edif
............\...............\.................\.onstrs_1\fileset.xml
............\...............\.................\runs\impl_1.psg
............\...............\.................\....\runs.xml
............\...............\.................\sim_1\fileset.xml
............\...............\.................\.ources_1\fileset.xml
............\...............\.................\wt\project.wpc
............\...............\.................\..\webtalk_pa.xml
............\...............\PS2_keyboard.ppr

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