{"id":22552658,"url":"https://github.com/aofarmakis/nibbling-bits","last_synced_at":"2025-04-10T04:15:00.143Z","repository":{"id":267009433,"uuid":"896601939","full_name":"aofarmakis/Nibbling-bits","owner":"aofarmakis","description":"Design and documentation for a very simple 4-bit processor named NibbleBuddy and its assembler.","archived":false,"fork":false,"pushed_at":"2024-12-07T16:54:10.000Z","size":4202,"stargazers_count":32,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-04-10T04:14:53.952Z","etag":null,"topics":["assembler","assembly","computer-architecture","computer-organization","hardware-description-language","instruction-set-architecture","processor-design","single-cycle-processor","verilog"],"latest_commit_sha":null,"homepage":"","language":"Verilog","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/aofarmakis.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2024-11-30T19:56:04.000Z","updated_at":"2025-03-28T15:19:13.000Z","dependencies_parsed_at":"2024-12-07T17:36:35.510Z","dependency_job_id":null,"html_url":"https://github.com/aofarmakis/Nibbling-bits","commit_stats":null,"previous_names":["aofarmakis/nibbling-bits"],"tags_count":2,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/aofarmakis%2FNibbling-bits","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/aofarmakis%2FNibbling-bits/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/aofarmakis%2FNibbling-bits/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/aofarmakis%2FNibbling-bits/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/aofarmakis","download_url":"https://codeload.github.com/aofarmakis/Nibbling-bits/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248154996,"owners_count":21056543,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["assembler","assembly","computer-architecture","computer-organization","hardware-description-language","instruction-set-architecture","processor-design","single-cycle-processor","verilog"],"created_at":"2024-12-07T18:06:49.362Z","updated_at":"2025-04-10T04:15:00.118Z","avatar_url":"https://github.com/aofarmakis.png","language":"Verilog","funding_links":[],"categories":[],"sub_categories":[],"readme":"# NibbleBuddy\nThis repository contains the design and documentation for a very simple 4-bit processor named NibbleBuddy. It's an educational tool meant to show how one defines an Instruction Set Architecture (ISA), builds it using discrete gates and MSI components (multiplexers, flip-flops etc), examines N-operand machines and develops a rudimentary ecosystem for said processor, that being an HDL-based design and an assembler to transform Assembly code into machine code.\n\n## Processor diagram\n![NibbleBuddy's Architecture Diagram](Images/CPU%20all.png)\n*Figure 1: NibbleBuddy's Architecture Diagram.*\n\n## Instructions\nNibbleBuddy supports immediate and direct addressing modes wherever applicable, and is an accumulator-based architecture. The instructions supported are as follows:\n- HALT\n- STA\n- LDA\n- ADC\n- NOR\n- SETC\n- JNZ\n- JNC\n- JMP\n\n## Memory\nNibbleBuddy is a 4-bit Harvard memory architecture processor with a 5-bit program counter and a 4-bit data memory address bus. Thus, it is limited to 32 instructions at most and 16 4-bit data memory addresses.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Faofarmakis%2Fnibbling-bits","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Faofarmakis%2Fnibbling-bits","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Faofarmakis%2Fnibbling-bits/lists"}