One of the delights of the boring pre-VGA era is that you get to express your ... it supports a color graphic card to output RGB signals via its male DB15 connector. DEC Rainbow 100 to Princeton ...

Whereas the VGA standard defines the RGB signals along with a VSYNC and HSYNC signal, the Apple version can generate HSYNC, VSYC, but also CSYNC (composite sync). Which sync signal is generated ...