{"id":19854340,"url":"https://github.com/rhaamo/kicad-amiga2000","last_synced_at":"2026-03-05T01:34:25.358Z","repository":{"id":137209363,"uuid":"198198647","full_name":"rhaamo/kicad-amiga2000","owner":"rhaamo","description":" Amiga 2000 revision 6.2 motherboard re-done in KiCAD.  WARNING: stability issue with Wicher 500i, could be noise related from accelerator speed. 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resistor net around the 68k have been removed from schematics.\n- The two res net soldered to U603 and U604 have a dedicated footprint on PCB\n- The bridge C1/R1 also has footprint, same for R2 from U800\n- The PST reset have dedicated footprint, diode have been removed\n- There is an aditionnal header, J3, with OVR and INT2 breakout for accelerator cards, easier than clipping on chips\n- Jumpers should have a default working configuration labelled on the PCB plus various notes\n- The keyboard connector footprint have been modified to handle either the original one, or a standard MIDI one\n- The battery terminals are just a two pins header, just plug some wires and use any battery you want aside or glued or whatever\n\n# TODO\n\n- Check if there is no useless local labels that could have generated spurious nets connected in the PCB\n\n# Notes\n\nThe capacitors on the left of the POWER Connector are somewhat troubling if you don't have a lot of experience.\n\nSo the five caps should be placed like this (IGNORE the + footprint on the PCB):\n\n- C400, GND pin on left\n- C406, GND pin on left\n- C408, GND pin on right\n- C410, GND pin on left\n- C412, GND pin on right\n\nIf using an A500-Flash from Retro 7-bit, U540 and U203 can't be socketted or they will be too high.\n\n# Building\n\nThe file `amiga2000.csv` contains a full Mouser BOM, around ~150€.\n\nMemory and RTC chip should be got from eBay, same for the PST reset thingy (U1).\n\nThe ISA (8bit and 16bit connectors) fits perfectly a full-length connector got from like an old PC motherboard.\n\nThe the table at the bottom of this README for a list of DigiKey and Mouser P/N for ZORRO, CoPro, Video and ISA slots.\n\nOther chips (paula, denise, CIA, etc.) are got from a donor motherboard.\n\nIf building it for real: first test the PCB for short between GND and the various power lines (+5V, -5V, +12V, +5V_USER, etc.), the zorro should have all.\n\nThen solder all the electrolytics caps, connect power, re-test all the lines.\n\nSolder everything else, don't populate ICs yet, re-power and re-test.\n\nThen you can add ICs and run DiagROM and then enjoy.\n\nDO NOT POPULATE: J1, J2, C902, C917, R901, FB904, FB906, RP904, RP906, RP905, C230, C240, they are unpopulated on factory 6.2 rev, so, let them as-is.\n\n# Testing\n\nMy first prototype have been tested with DiagROM v1.1.\n\nWorking: mouse, zorro listing of detected cards, composite video out, video out, serial (out at least), one audio ch (the other one should work too), keyboard.\nBooting a workbench from the accelerator CF sorta work until noise issue or something make any disk I/O hang and crash.\n\nLeft to test: floppy, parallel port, if the RTC works properly.\n\nThe DiagROM detects 1024kB of chipmem, the extended test goes all the way up to 1023kB and then throw an error, I'm not sure if it's a DiagROM issue or just expected.\n\n# Libraries\n\nUses libraries from https://dev.sigpipe.me/dashieelectronics/kicad_libraries\n\n# Various tools\n\n## extract_labels.py\nNOTE: Broken since format change with KiCAD 7.0\n\nUse this script to quickly extract all Global Labels from wanted sheets.\n\n```\n./extract_labels.py agnus.kicad_sch amiga2000.kicad_sch chipram.kicad_sch coprocessor\\ slot.kicad_sch denise.kicad_sch expansion\\ logic.kicad_sch parallel.kicad_sch paula.kicad_sch pc\\ slots.kicad_sch power.kicad_sch processor.kicad_sch serial.kicad_sch zorro.kicad_sch\n```\n\n# License\n\nCC0\n\n# Sources\n\nMy own dying 6.2 A2000 board.\n\nThis pre-6.2 schematics, best scan quality available...:\n- http://amiga.serveftp.net/Schematics/A2000_schematics/A2000_rev6_schematics_scanned.pdf\n\nA big thanks for Floppie209 for his 1:1 board replica:\n- https://github.com/Floppie209/Amiga2000-remake/\n\nWhithout Floppie work I wouldn't have had enough motivation to sacrifice a sorta working board for measurements.\n\nDocumented 6.2 fixes: https://wiki.sigpipe.me/amiga:a2000:rev6.2fixes\n\n# Random parts numbers\n\n| for | Digikey PN | Mouser PN | Manufacturer PN | EOL |\n|-----|------------|-----------|-----------------|-----|\n| Zorro (100pins) | A121376-ND | 571-5645235-3 | 5645235-3 | no |\n| CoPro (86pins) | A144213-ND | 571-1-5530843-0 | 1-5530843-0 | no |\n| Video Slots and ISA16bit (36p) | A31716-ND |  571-5530843-3 | 5530843-3 | no |\n| ISA 8bit (62) | A121053-ND |  571-7-5530843-0  | 7-5530843-0 | no |\n| Full lenght ISA slots | A101941-ND |  571-5176139-2  | 5176139-2 | no |\n| Power connector, 14 pins |   | 538-26-60-4140 | 26-60-4140 | no |\n\n# Pictures\n\n\u003cimg width=\"400\" src=\"https://raw.githubusercontent.com/rhaamo/kicad-amiga2000/master/pictures/IMG_8130.jpeg\" alt=\"\"\u003e\n\u003cimg width=\"400\" src=\"https://raw.githubusercontent.com/rhaamo/kicad-amiga2000/master/pictures/IMG_8156.jpeg\" alt=\"\"\u003e\n\u003cimg width=\"400\" src=\"https://raw.githubusercontent.com/rhaamo/kicad-amiga2000/master/pictures/IMG_8158.jpeg\" alt=\"\"\u003e\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frhaamo%2Fkicad-amiga2000","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Frhaamo%2Fkicad-amiga2000","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frhaamo%2Fkicad-amiga2000/lists"}