David Galloway pointed out a bugfix in the above areas re some cranky vectrexes...

"The crux of the change is moving the disable zero / blank - IE putting 0xCE into dp_VIA_cnt1 down after setting dp_VIA_port_b = 0"

See https://github.com/phoboz/spidex/commit/47b93345d4ee22ba293264f3586ceb56846d1623


There may be other places in my programs where this needs to be applied.  These ones show up in a quick grep for 0xce ...


CineTanks/main.c:		dp_VIA_cntl = (unsigned int)0xce;	// disable zero, disable all blank
CineTanks/main.c:			dp_VIA_cntl = (unsigned int)0xce;	// disable zero, disable all blank
CineTanks/main.c:					dp_VIA_cntl = (unsigned int)0xce;	// disable zero, disable all blank

stevedore/stevedore.c:	  dp_VIA_cntl = (uint8)0xce;	// disable zero, disable all blank
stevedore/stevedore.c:          dp_VIA_cntl = (uint8)0xce;      // disable zero, disable all blank

Not yet applied anywhere.