{"id":13838971,"url":"https://github.com/maccasoft/propeller-graphics-card","last_synced_at":"2026-02-15T11:12:36.071Z","repository":{"id":63276838,"uuid":"125013485","full_name":"maccasoft/propeller-graphics-card","owner":"maccasoft","description":"Add-on board and firmware for the RC2014 computer to provide graphics 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Propeller Graphics Card\n\nAdd-on board and firmware designed for the [RC2014](http://rc2014.co.uk/) computer to provide graphics capabilities.\n\n![The board](board.jpg)\n\n### Specifications\n\n * Resolution up to 320x240 pixels with 64 colors\n * Tile graphics with 8x8 pixels tiles\n * Sprites with 8x8 up to 32x32 pixels\n * Full screen scroll\n * Overlays for score and indicators\n * Bitmap graphics modes 320x240x3bpp, 256x192x4bpp and 256x224x4bpp\n * RGB PAL, NTSC and VGA output\n\nThe board uses I/O ports **40H, 41H, 42H and 43H** for programming.\n\nSee the [Wiki](https://github.com/maccasoft/propeller-graphics-card/wiki) pages for the documentation.\n\n### Schematic\n\n![The schematic](schematic.png)\n\n\n| Parts List            |                     |          |                                 |\n| --------------------- | ------------------- | -------- | ------------------------------- |\n| R1, R2, R16-R31       | 4.700 ohm 1/4 watt  | IC1      | MCP1700-3302E/TO                |\n| R3                    | 1.200 ohm 1/4 watt  | IC2      | P8X32A-D40                      |\n| R4                    | 33.000 ohm 1/4 watt | IC3      | 24LC512                         |\n| R5, R7, R9            | 510 ohm 1/4 watt 1% | TR1      | NPN Transistor BC547            |\n| R6, R8, R10, R11, R12 | 240 ohm 1/4 watt 1% | JP1      | 3 pin male header               |\n| R13, R14, R15         | 130 ohm 1/4 watt 1% | JP2      | 1 pin male header               |\n| R32, R33, R34         | 10.000 ohm 1/4 watt | JP3, JP4 | 2 pin male header               |\n| C1, C5                | 10 uF 63v elettr.   | CN1      | 40 pin male header, right angle |\n| C2, C3, C4            | 100.000 pF poly.    | CN2      | DB15 HD female connector        |\n| D1, D2, D3, D4, D5    | 1N4148              | CN4      | 5 pin male header               |\n| XTAL1                 | 5 MHz crystal       |          |                                 |\n\n\nBoard shared on [OSHPark](https://oshpark.com/shared_projects/1gud4wQD) and available on [Tindie](https://www.tindie.com/stores/maccasoft/).\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmaccasoft%2Fpropeller-graphics-card","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmaccasoft%2Fpropeller-graphics-card","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmaccasoft%2Fpropeller-graphics-card/lists"}