None
== '''Technical''' ==
The cross hairs will flash on CRTCs with a fixed length VSYNC. i.e. Type 1 (UM6845R) or Type 2 (MC6845).
It doesn't flash on a CRTC with a variable length VSYNC i.e. Type 0 (HD6845S, UM6845), ASIC or Pre-ASIC.
== '''Prequels / Sequels''' ==