After a weekend's study, some progress of netmerc was made:
The model-1's geo processors are also capable of triangles, in addition to quads.
The flickering background is still a headache. It seems related to v60 cpu emulation -- from disassembling, some instructions seem to test double-buffer 3D registers(@0x680000), but currently write the lower-word of PC value to 0x53fff8, and then copied to palette no. 0
I'm not familiar with v60 cpu. Any friend would like to take a loot at it?
[Posted by: Naibo]