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DOS toolset; optimizes CGA output for TV sets. Includes a boot-sector version for booter game support.

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viler-int10h/TVCGAFix

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TVCGAFix Utilities

A small DOS toolset for improving CGA composite video on television sets. Main purposes:

  • Allow adjustment of the picture's horizontal position, for proper centering
  • Make color output in 80-column text modes more reliable, by working around a CGA design bug (or is it a feature?)

Includes:

  • TVCGAFIX: main TSR; allows you to adjust the H-position, improves color output with 80-column text, and makes the changes 'stick' for most programs/games
  • MAKEBOOT: boot-disk maker; allows you to load the fix at system startup (to support 'booter' games)
  • TVCGACAL: displays a calibration screen so you can find the optimal H-position
  • TV80: lets you make further adjustments specific to 80-column text mode

Coincidentally, TVCGAFIX also helps certain RGB capture devices get good color from a (converted) CGA signal... at least the Datapath VisionRGB E1s. Not written for that purpose, but consider it a bonus.

See README.TXT for detailed documentation.