Sorry, i didnt want to be nosey.

A new pull request is available on Github (Enhance DEC Rainbow 100 Option Graphics #1589).

It seems i am a bit at a dead end with the NEC GDC.

Perhaps someone more knowledgeable could have a look at vector mode and the odd FIG parameters - see section BUGS in #1589

+Interaction of Upd7220 and Rainbow.cpp:
+- FIG directions / params appear to be odd (lines go 45 degrees up or down instead of straight dir.),
+- RDAT with MOD 2 is unimplemented. WDAT appears to set "m_bitmap_mod" wrongly ("2" means all pixels will be reset)

Text looks funny too (see screenshots above) smile

Several assembly snippets and freeware games are here (ASM in folder EX32)

Last edited by Bavarese; 10/28/16 05:28 PM.