- #Where do you put fonts for autocad 2013 full
- #Where do you put fonts for autocad 2013 software
- #Where do you put fonts for autocad 2013 Pc
- #Where do you put fonts for autocad 2013 series
#Where do you put fonts for autocad 2013 series
For cost reasons, this is not done using an RGB-to-YIQ converter as called for by the NTSC standard, but by a series of flip-flops and delay lines. With a composite color monitor/television set ĬGA's 16 colors when using the NTSC output (post-1983 card revision)įor the composite output, these four-bit color numbers are encoded by the CGA's onboard hardware into an NTSC-compatible signal fed to the card's RCA output jack.
#Where do you put fonts for autocad 2013 Pc
This "RGBI with tweaked brown" palette was retained as the default palette of later PC graphics standards such as EGA and VGA, which can select colors from much larger gamuts, but default to these until reprogrammed. The exact amount of reduction differed between monitor models: the original IBM 5153 Personal Computer Color Display reduces the green signal's amplitude by about one third, while the IBM 5154 Enhanced Color Display internally converts all 4-bit RGBI color numbers to 6-bit ECD color numbers, which amounts to halving the green signal's amplitude. Green := 2/3×( colorNumber & 2)/2 + 1/3×( colorNumber & 8)/8īlue := 2/3×( colorNumber & 1)/1 + 1/3×( colorNumber & 8)/8Ĭolor 6 is treated differently when using the formula above, color 6 would become dark yellow, as seen to the left, but in order to achieve a more pleasing brown tone, special circuitry in most RGBI monitors, starting with the IBM 5153 color display, makes an exception for color 6 and changes its hue from dark yellow to brown by reducing the analogue green signal's amplitude.
With respect to the RGBI color model described above, the monitor would use approximately the following formula to process the digital four-bit color number to analog voltages ranging from 0.0 to 1.0: Within the monitor, the four signals are interpreted to drive the red, green and blue color guns. When using a direct-drive monitor, the four color bits are output directly to the DE-9 connector at the back of the card.
#Where do you put fonts for autocad 2013 full
In the medium- and high-resolution modes, colors are stored at a lower bit depth and selected by fixed palette indexes, not direct selection from the full 16-color palette. Note the use of dithering to simulate gray tones and non-square pixel ratio that deforms the fonts.ĬGA uses a 16-color gamut, but not all colors are available at all times, depending on which graphics mode is being used. The 40×25 text and 320×200 graphics modes are usable with a television, and the 80×25 text and 640×200 graphics modes are intended for a monitor. IBM intended that CGA be compatible with a home television set.
#Where do you put fonts for autocad 2013 software
Some software achieved greater color depth by utilizing artifact color when connected to a composite monitor. 640×200 in 2 colors, one black, one chosen from a 16-color palette.320×200 in 4 colors, chosen from 3 fixed palettes, with high- and low-intensity variants, with color 1 chosen from a 16-color palette.160×100 in 16 colors, chosen from a 16-color palette, utilizing a specific configuration of the 80x25 text mode.Some third-party displays lacked the intensity input, reducing the number of available colors to eight, and many also lacked IBM's unique circuitry which rendered the dark-yellow color as brown, so any software which used brown would be displayed incorrectly. Īlthough IBM's own color display was not available, customers could either use the composite output (with an RF modulator if needed), or the direct-drive output with available third-party monitors that supported the RGBI format and scan rate.
IBM produced the 5153 Personal Computer Color Display for use with the CGA, but this was not available at release and would not be released until March 1983. The RCA connector provided only baseband video, so to connect the CGA card to a television set without a composite video input required a separate RF modulator. The CGA card could be connected either to a direct-drive CRT monitor using a 4-bit digital ( TTL) RGBI interface, such as the IBM 5153 color display, or to an NTSC-compatible television or composite video monitor via an RCA connector.
The highest display resolution of any mode was 640×200, and the highest color depth supported was 4-bit (16 colors). The original IBM CGA graphics card was built around the Motorola 6845 display controller, came with 16 kilobytes of video memory built in, and featured several graphics and text modes.