├── .gitattributes ├── .github └── workflows │ └── ci.yml ├── .gitignore ├── .reuse └── dep5 ├── LICENSES ├── Apache-2.0.txt ├── CC-BY-4.0.txt ├── CC0-1.0.txt └── MIT.txt ├── README.markdown ├── mbc1b ├── MBC1B.jpg ├── MBC1B.svg ├── MBC1B_chip.jpg ├── README.markdown ├── hdl │ ├── cells │ │ ├── aoi22.vhd │ │ ├── cells.vhd │ │ ├── dffr.vhd │ │ ├── inv.vhd │ │ ├── nand2.vhd │ │ ├── nand2_pwr.vhd │ │ ├── nand4.vhd │ │ ├── nand5.vhd │ │ ├── nor2_pwr.vhd │ │ ├── oai21.vhd │ │ ├── obuf.vhd │ │ ├── odrv.vhd │ │ └── schmitt.vhd │ ├── generated │ │ ├── .gitignore │ │ ├── MBC1B.vhd │ │ ├── bank1_register.vhd │ │ ├── bank2_register.vhd │ │ ├── input_gating.vhd │ │ ├── mode_register.vhd │ │ ├── modules.vhd │ │ ├── output_addr_decoding.vhd │ │ ├── ramg_register.vhd │ │ └── write_addr_decoding.vhd │ ├── mbc1b_hdl │ │ └── vunit.py │ ├── mbc1b_tb.vhd │ ├── pyproject.toml │ ├── task.py │ └── uv.lock ├── justfile └── schematic │ ├── MBC1B.kicad_pro │ ├── MBC1B.kicad_sch │ ├── MBC1B.kicad_sym │ ├── MBC1B.pdf │ ├── MBC1B.pdf.license │ ├── bank1_register.kicad_sch │ ├── bank2_register.kicad_sch │ ├── input_gating.kicad_sch │ ├── mode_register.kicad_sch │ ├── output_addr_decoding.kicad_sch │ ├── ramg_register.kicad_sch │ ├── sym-lib-table │ └── write_addr_decoding.kicad_sch └── sm83-cpu-core ├── .gitignore ├── README.markdown ├── SGB-CPU_01_chip.jpg ├── SGB-CPU_01_sm83_core_40x.svg ├── SGB-CPU_01_sm83_core_40x.svg.license ├── hdl ├── .gitignore ├── alu.vhd ├── alu_stage1.vhd ├── alu_stage2.vhd ├── cells │ ├── dff.vhd │ ├── dlatch.vhd │ ├── io_cell.vhd │ ├── srlatch.vhd │ ├── ssdff.vhd │ └── ssdff_vector.vhd ├── control_unit.vhd ├── cpu_core.vhd ├── decoder.vhd ├── decoder_stage1.vhd ├── decoder_stage2.vhd ├── decoder_stage3.vhd ├── idu.vhd ├── interrupts.vhd ├── pyproject.toml ├── regfile.vhd ├── simulation │ ├── async_ram.vhd │ ├── decoder_tb.vhd │ ├── sm83_test_pkg.vhd │ ├── test_rom_tb.vhd │ └── test_soc.vhd ├── sm83_alu_pkg.vhd ├── sm83_decoder_pkg.vhd ├── sm83_hdl │ └── 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