[DirectX 6 Programmer's Reference] Vertical Blanking Interval Data (100%)

DirectX Foundation > DirectDraw > DirectDraw Essentials > Advanced DirectDraw Topics > Video-Ports

[DirectX 7 Programmer's Reference] Vertical Blanking Interval Data (97.7272727272727%)

Microsoft DirectX 7.0 > DirectDraw > DirectDraw Essentials > Advanced DirectDraw Topics > Video Ports