Welcome to Mr. Latch-up's C64 DTV Advice Column

Featured Dilemma:

Why does Hummer Racing start up in black and white when holding <cntrl>?

Dear Mr Latch,   I've attached a ps/2 keyboard to my Hummer Racing steering wheel.  Why does it default to black and white video when I hold <cntrl> at startup? Sincerly, Chad Hall Tonopah, NV

Dear Chad,   During software developement the prototypes were loaded with a slightly different crystal, so the debug routines (what happens when you hold <cntrl>) set the burst rate registers for the wrong crystal. The burst values for 32.7272 mhz NTSC should be: $D041 = $1c $D042 = $00 $D043 = $00