Radio-86RK

To implement this there were lot of things that should be changed and implemented.

First was Intel 8257 DMA controller autoload mode. Since this is part of MAME core first must be checked in their code so this machine will be available after next MAME release.

2nd thing to implement was 8275 CRT controller. For now there is a partial implementation which I am still improving.

Here are some images :






Please note that video mode is 78 x 30 chars, but not all have content that is why you see border on images, so it looks same as on real machine.