58 lines
2.9 KiB
Markdown
58 lines
2.9 KiB
Markdown
---
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layout: page
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title: Columbia Data Products Color Graphics Adapter (CGA)
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permalink: /devices/pcx86/video/cdp/cga/
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redirect_from:
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- /devices/pc/video/cdp/cga/
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---
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Columbia Data Products Color Graphics Adapter (CGA)
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---
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We don't have a Columbia Data Products CGA card, so we cannot say to what extent it may differ from
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an IBM CGA card (if at all). All we have is what's believed to be a copy of their CGA character ROM,
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and it is *identical* the CGA portion of the [IBM CGA](/devices/pcx86/video/ibm/cga/) character ROM.
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### Columbia Data Products CGA Configurations
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The easiest way for a machine to include an CGA *[Video](/docs/pcx86/video/)* component in its XML configuration file
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is to reference the project's predefined CGA configuration file, using the *ref* attribute; eg:
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```xml
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<video ref="/devices/pcx86/video/cdp/cga/cdp-cga.xml"/>
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```
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The referenced XML file automatically defines visual elements (eg, dimensions of the display window and other
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visual indicators), display behaviors (eg, touchscreen support, mouse pointer locking), and the character ROM to load.
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Here's what *cdp-cga.xml* currently looks like:
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```xml
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<video id="videoCGA" model="cga" screenwidth="960" screenheight="480" scale="true" charset="/devices/pcx86/video/cdp/cga/MPC_VID-1.0.json" pos="center" padding="8px">
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<menu>
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<title>Color Display</title>
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<control type="container" pos="right">
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<control type="led" label="Caps" binding="caps-lock" padleft="8px"/>
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<control type="led" label="Num" binding="num-lock" padleft="8px"/>
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<control type="led" label="Scroll" binding="scroll-lock" padleft="8px"/>
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</control>
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</menu>
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</video>
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```
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### Columbia Data Products CGA Character ROM
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There is only one known Columbia Data Products CGA Character ROM ([MPC_VID-10.json](MPC_VID-1.0.json)), and it is
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*identical* to the CGA portion of the [IBM CGA](/devices/pcx86/video/ibm/cga/) character ROM.
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For reference, here are the first 0x80 bytes at offset 0x0000 from this ROM, which contain the font data for the first
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16 8x8 characters:
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x81,0xA5,0x81,0xBD,0x99,0x81,0x7E, // 0x00000000 ........~......~
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0x7E,0xFF,0xDB,0xFF,0xC3,0xE7,0xFF,0x7E,0x6C,0xFE,0xFE,0xFE,0x7C,0x38,0x10,0x00, // 0x00000010 ~......~l...|8..
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0x10,0x38,0x7C,0xFE,0x7C,0x38,0x10,0x00,0x38,0x7C,0x38,0xFE,0xFE,0xD6,0x10,0x38, // 0x00000020 .8|.|8..8|8....8
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0x10,0x10,0x38,0x7C,0xFE,0x7C,0x10,0x38,0x00,0x00,0x18,0x3C,0x3C,0x18,0x00,0x00, // 0x00000030 ..8|.|.8........
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0xFF,0xFF,0xE7,0xC3,0xC3,0xE7,0xFF,0xFF,0x00,0x3C,0x66,0x42,0x42,0x66,0x3C,0x00, // 0x00000040 ..........fBBf..
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0xFF,0xC3,0x99,0xBD,0xBD,0x99,0xC3,0xFF,0x0F,0x07,0x0F,0x7D,0xCC,0xCC,0xCC,0x78, // 0x00000050 ...........}...x
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0x3C,0x66,0x66,0x66,0x3C,0x18,0x7E,0x18,0x3F,0x33,0x3F,0x30,0x30,0x70,0xF0,0xE0, // 0x00000060 .fff..~.?3?00p..
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0x7F,0x63,0x7F,0x63,0x63,0x67,0xE6,0xC0,0x18,0xDB,0x3C,0xE7,0xE7,0x3C,0xDB,0x18, // 0x00000070 .c.ccg..........
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