This a 51 unit code of each program can be independent of the debugging is very easy to learn for beginners.

vhdl\addsub_core_.vhd
....\addsub_core_struc.vhd
....\addsub_core_struc_cfg.vhd
....\addsub_cy_.vhd
....\addsub_cy_rtl.vhd
....\addsub_cy_rtl_cfg.vhd
....\addsub_ovcy_.vhd
....\addsub_ovcy_rtl.vhd
....\addsub_ovcy_rtl_cfg.vhd
....\alucore_.vhd
....\alucore_rtl.vhd
....\alucore_rtl_cfg.vhd
....\alumux_.vhd
....\alumux_rtl.vhd
....\alumux_rtl_cfg.vhd
....\comb_divider_.vhd
....\comb_divider_rtl.vhd
....\comb_divider_rtl_cfg.vhd
....\comb_mltplr_.vhd
....\comb_mltplr_rtl.vhd
....\comb_mltplr_rtl_cfg.vhd
....\control_fsm_.vhd
....\control_fsm_rtl.vhd
....\control_fsm_rtl_cfg.vhd
....\control_mem_.vhd
....\control_mem_rtl.vhd
....\control_mem_rtl_cfg.vhd
....\dcml_adjust_.vhd
....\dcml_adjust_rtl.vhd
....\dcml_adjust_rtl_cfg.vhd
....\LGPL.TXT
....\mc8051_alu_.vhd
....\mc8051_alu_struc.vhd
....\mc8051_alu_struc_cfg.vhd
....\mc8051_control_.vhd
....\mc8051_control_struc.vhd
....\mc8051_control_struc_cfg.vhd
....\mc8051_core_.vhd
....\mc8051_core_struc.vhd
....\mc8051_core_struc_cfg.vhd
....\mc8051_p.vhd
....\mc8051_siu_.vhd
....\mc8051_siu_rtl.vhd
....\mc8051_siu_rtl_cfg.vhd
....\mc8051_tmrctr_.vhd
....\mc8051_tmrctr_rtl.vhd
....\mc8051_tmrctr_rtl_cfg.vhd
....\mc8051_top_.vhd
....\mc8051_top_struc.vhd
....\mc8051_top_struc_cfg.vhd
version.txt
dc\scr\synth_core_dc.scr
.ocu\comp_orig_ipcore.pdf
....\mc8051_overview.pdf
....\mc8051_user_guide.pdf
msim\hex2dual.c
....\keil.dua
....\keil.hex
....\mc8051_compile.do
....\mc8051_rom.dua
....\mc8051_sim.do
....\mc8051_wave.do
....\readme.txt
....\regs.log
....\tc1.asm
....\tc1.dua
....\tc1.hex
....\write2file.do
synpl\mc8051_core.prj
tb\mc8051_ramx_.vhd
..\mc8051_ramx_sim.vhd
..\mc8051_ramx_sim_cfg.vhd
..\mc8051_ram_.vhd
..\mc8051_ram_sim.vhd
..\mc8051_ram_sim_cfg.vhd
..\mc8051_rom_.vhd
..\mc8051_rom_sim.vhd
..\mc8051_rom_sim_cfg.vhd
..\tb_mc8051_alu_.vhd
..\tb_mc8051_alu_sim.vhd
..\tb_mc8051_alu_sim_cfg.vhd
..\tb_mc8051_core_.vhd
..\tb_mc8051_core_sim.vhd
..\tb_mc8051_core_sim_cfg.vhd
..\tb_mc8051_siu_.vhd
..\tb_mc8051_siu_sim.vhd
..\tb_mc8051_siu_sim_cfg.vhd
..\tb_mc8051_tmrctr_.vhd
..\tb_mc8051_tmrctr_sim.vhd
..\tb_mc8051_tmrctr_sim_cfg.vhd
..\tb_mc8051_top_.vhd
..\tb_mc8051_top_sim.vhd
..\tb_mc8051_top_sim_cfg.vhd
dc\scr
..\reports
..\log
..\lib
..\db
vhdl
vss

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