The other day I ran into my doc's about CGA displays, including the lightpen input. The light pen was a photo transistor and a switch that signaled the CGA board the light pen was pressing on the glass screen. The CGA display actually did the scanning (with a quickly flying 'light dot' to find the pen position) and reported it back to the computer through the CGA display card.
Now back to your daily dose of non-bone-kives-and-bear-skin-technology. -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
