Description
Ever want to experiment with just sending crazy signals into your old CRT VGA monitor but couldn’t figure out that pesky Horizontal and Vertical Sync nonsense? Well, we got you covered, fam! This cheap little 8-pin DIP requires no external components, just +5v to generate the proper VGA sync signals for 640×480 at 75hz. (Check the Nerd Specs below for complete timing information…). Beware that some tradeoffs were made between precise timing and the ability to create the necessary signals without the need for external components. Due to the wide range of VGA displays available, we cannot guarantee that this chip will work with every display, but we’ve tested it on many displays and haven’t found one yet it didn’t work with. SEE THE MANUAL FOR COMPLETE USAGE INFORMATION: BLANKREG_INSTRUCTIONS.PDF
NERD SPECS Ideal Timing*: Mode name: IBM 640x480 75hz Pixel clock: 31.5 MHz Active horizontal video: 640 pixels Horizontal Front Porch: 16 pixels Horizontal Sync Pulse: 96 pixels Horizontal Back Porch: 48 pixels Active vertical video: 480 pixels Vertical Front Porch: 11 pixels Vertical Sync Pulse: 2 pixels Vertical Back Porch: 32 pixels *Timing may not be cycle-precise but MOST VGA displays are forgiving enough to display *something* :-)
