{"id":23586564,"url":"https://github.com/doctorwkt/2fisc","last_synced_at":"2025-05-07T07:47:16.366Z","repository":{"id":96057226,"uuid":"276090162","full_name":"DoctorWkt/2FISC","owner":"DoctorWkt","description":"FISC2: A TTL CPU with Some 16-bit Capabilities","archived":false,"fork":false,"pushed_at":"2020-07-11T07:12:36.000Z","size":6772,"stargazers_count":10,"open_issues_count":0,"forks_count":0,"subscribers_count":4,"default_branch":"master","last_synced_at":"2025-03-31T07:51:15.240Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Perl","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/DoctorWkt.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":"2020-06-30T12:19:18.000Z","updated_at":"2024-09-04T07:16:27.000Z","dependencies_parsed_at":null,"dependency_job_id":"c1d3777b-bc6f-47da-bd60-1fdd9446a0ba","html_url":"https://github.com/DoctorWkt/2FISC","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DoctorWkt%2F2FISC","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DoctorWkt%2F2FISC/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DoctorWkt%2F2FISC/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/DoctorWkt%2F2FISC/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/DoctorWkt","download_url":"https://codeload.github.com/DoctorWkt/2FISC/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":252839040,"owners_count":21812083,"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":[],"created_at":"2024-12-27T04:11:35.192Z","updated_at":"2025-05-07T07:47:16.358Z","avatar_url":"https://github.com/DoctorWkt.png","language":"Perl","funding_links":[],"categories":[],"sub_categories":[],"readme":"# FISC2: A TTL CPU with Some 16-bit Capabilities\n\nFISC2 is a microseqenced CPU built from discrete TTL-level components.\nIt provides\n + recursive **F**unctions,\n + **I**ndexed addressing,\n + **S**tack operations, and\n + some instructions on 16-bit data values\n\nas well as the usual load/store and arithmetic operations, comparisons,\nbranches and jumps.\n\nThe design uses 29 chips and has 8K of ROM, 336K of available RAM and a UART.\n\n![](Docs/Figs/pcb.jpg)\n\n## Documentation\n\nThe overall design of the CPU is covered in\n[Docs/arch_overview.md](Docs/arch_overview.md), and some details\nof the hardware implementation are in \n[Docs/fisc2_implementation.md](Docs/fisc2_implementation.md).\n\n## Implementation\n\nAt present, I have:\n\n + a Perl CPU simulator, [csim](csim)\n + an assembler, [cas](cas)\n + a simple compiler, [clc](clc)\n + example assembly and higher-level programs in [Examples](Examples)\n + a Verilog design in [Verilog](Verilog)\n + a final schematic in [Kicad/schematic.pdf](Kicad/schematic.pdf)\n\n## Status of the CPU\n\n**early-July, 2020**: Both the Perl simulator and the Verilog model work\nwell. I am happy with the design and I've ordered the PCBs and components.\n\nFor more detail on progress, you can read my [journal](Docs/journal.md).\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdoctorwkt%2F2fisc","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdoctorwkt%2F2fisc","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdoctorwkt%2F2fisc/lists"}