gloriouscowHnng.
Normies will never understand the ecstasy of imaging a never before imaged floppy.
I'm going to need to build a 486 now, won't I...
Everything on the PXL-380 CGA/EGA light pen card is a standard component. All 74 series logic.
It looks like the card is not actually doing cursor position calculation, it's just running two binary counters that reset on hsync and vsync which the driver can read and do the math in software.
Its also a two layer board. So the good news is we can make new light pen boards!
gmc@gloriouscow Interesting. Can we alo make new light pens??
Lockpick Extreme@gmc @gloriouscow Way back when, I built a simple light pen for my Atari 400. It needed a cathode ray TV and some code (I wrote in Basic).