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Convert9918 - v168


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386 downloads total
windows.gif   Download Convert9918 for Windows. (1.1 mb)  

NOTE: Please download the latest code from GitHub: I haven't updated my local pages just yet. :)

This program can convert most modern graphics into a form compatible with the TMS9918A bitmap mode. It supports a drag-and-drop interface and handles resizing and scaling, several forms of user-configurable dithering, adjustable color selection, and more.

It also supports multi-color (64x48) mode, a dual-multicolor mode with flicker, and a half-multicolor mode that flickers multicolor with bitmap to get more colors.

Finally, it also supports two palette modes for the F18A VDP replacement - a 16-color palette mode, and a per-scanline palette mode (this mode uses most of the VDP RAM and requires the GPU to update the palette every scanline, but because it runs on the GPU the host CPU is not impacted at all!)

Sample video at

Last Updates (max 5)

  • Screen Scaling aware
  • Added slider to adjust offset of ordered dither
  • Reworked Ordered dithers: 1 is now a standard 2x2 matrix, 2 is the same but with error distribution, 3 is the same 4x4 matrix from previous releases, and 4 is the 4x4 with error distribution.
  • Numerous tweaks and source fixes

  • Added ability to gamma correct the source image

  • improvement to quality of ordered dither 1 - far less color shift
  • more minor speedups
  • fix order of palette output for F18A - to fix old files, remove index 2 and insert at index 14

    Fix crash bug when saving from GUI
  • 162 and 163 were not reading the last few palette entries correctly. Delete your INI if you have any color issues.

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    Last Update:2017-10-29

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