cds@atelabs.UUCP (David Shanks) (07/29/87)
DISCLAIMER: I have not attempted to do this with any display card. I am not recommending that you attempt it. I am only relating a method that has been published. In article <150@rocksvax.UUCP> martyl@rocksvax.UUCP (Marty Leisner) writes: >In article <471@phoenix.PRINCETON.EDU> pguhatha@phoenix.PRINCETON.EDU (Puragra Guhathakurta) writes: >>Does anyone know how to turn off the blinking cursor on a PC? >I seem to recall reading the 6845 video controller builds the cursor into >hardware and it must blink. Well, yes and no. Yes, the 6845 does control the cursor. That's why you can control the cursor's size by reprogramming the 6845. But the blink is not mandated by the 6845. IBM's display adapters generate cursor blink with some gate logic. An oscillating signal and the cursor signal are fed into an AND gate. The output is an oscillating (blinking) cursor signal. You can actually get rid of the blink by doing some surgery on your display card. All that you need to do is cut the proper trace and perhaps pull it high. This is all described in some detail in "Un-Blinking The PC's Blinkin' Cursor" by Sigi Kluger in _Micro_Cornucopia_, #31, Aug-Sept 1986. -- Dave Shanks ..!tektronix!tessi!atelabs!cds AT&E Laboratories cds@atelabs.UUCP 1400 NW Compton Suite 300 (503) 690-2000 Beaverton, OR 97006