https://github.com/maccasoft/propeller-graphics-card

Add-on board and firmware for the RC2014 computer to provide graphics capabilities
https://github.com/maccasoft/propeller-graphics-card

graphics ntsc pal parallax-propeller-microcontroller rc2014 rgb sprites vga

Last synced: about 22 hours ago
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Add-on board and firmware for the RC2014 computer to provide graphics capabilities

• Host: GitHub
• URL: https://github.com/maccasoft/propeller-graphics-card
• Owner: maccasoft
• Created: 2018-03-13T07:58:33.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-02-13T15:54:09.000Z (over 5 years ago)
• Last Synced: 2024-03-10T18:34:25.911Z (4 months ago)
• Topics: graphics, ntsc, pal, parallax-propeller-microcontroller, rc2014, rgb, sprites, vga
• Language: Assembly
• Size: 383 KB
• Stars: 39
• Watchers: 12
• Forks: 8
• Open Issues: 8
• Metadata Files:
  • Readme: README.md

Lists

• awesome-rc2014 - Propeller Graphics Card

README

        
## Propeller Graphics Card

Add-on board and firmware designed for the [RC2014](http://rc2014.co.uk/) computer to provide graphics capabilities.

![The board](board.jpg)

### Specifications

 * Resolution up to 320x240 pixels with 64 colors

 * Tile graphics with 8x8 pixels tiles

 * Sprites with 8x8 up to 32x32 pixels

 * Full screen scroll

 * Overlays for score and indicators

 * Bitmap graphics modes 320x240x3bpp, 256x192x4bpp and 256x224x4bpp

 * RGB PAL, NTSC and VGA output

The board uses I/O ports **40H, 41H, 42H and 43H** for programming.

See the [Wiki](https://github.com/maccasoft/propeller-graphics-card/wiki) pages for the documentation.

### Schematic

![The schematic](schematic.png)

| Parts List            |                     |          |                                 |

| --------------------- | ------------------- | -------- | ------------------------------- |

| R1, R2, R16-R31       | 4.700 ohm 1/4 watt  | IC1      | MCP1700-3302E/TO                |

| R3                    | 1.200 ohm 1/4 watt  | IC2      | P8X32A-D40                      |

| R4                    | 33.000 ohm 1/4 watt | IC3      | 24LC512                         |

| R5, R7, R9            | 510 ohm 1/4 watt 1% | TR1      | NPN Transistor BC547            |

| R6, R8, R10, R11, R12 | 240 ohm 1/4 watt 1% | JP1      | 3 pin male header               |

| R13, R14, R15         | 130 ohm 1/4 watt 1% | JP2      | 1 pin male header               |

| R32, R33, R34         | 10.000 ohm 1/4 watt | JP3, JP4 | 2 pin male header               |

| C1, C5                | 10 uF 63v elettr.   | CN1      | 40 pin male header, right angle |

| C2, C3, C4            | 100.000 pF poly.    | CN2      | DB15 HD female connector        |

| D1, D2, D3, D4, D5    | 1N4148              | CN4      | 5 pin male header               |

| XTAL1                 | 5 MHz crystal       |          |                                 |

Board shared on [OSHPark](https://oshpark.com/shared_projects/1gud4wQD) and available on [Tindie](https://www.tindie.com/stores/maccasoft/).