| Previous | 199869 Revisions | Next |
| r111614 Tuesday 21st August, 2018 at 05:57:52 UTC by patrick.mackinlay |
|---|
| bt459: add contrast control (nw) Use a simplistic multiply to simulate contrast control. InterPro systems write to a "virtual contrast DAC" register/latch of some kind, which presumably adjusts the reference voltage produced by the Bt438 before it enters the RAMDAC; this approximation is very crude, however it's simple and produces a satisfactory visual result. |
| [src/devices/video] | bt459.cpp bt459.h |
| https://github.com/mamedev/mame/commit/970c812877ecf39a885c9161fe0d133a8258a429 |
| Previous | 199869 Revisions | Next |