At least in the U.S., during the 1970s and 1980s (and likely before), many tollways and other ticket-based systems used to use publicly distributed and collected "IBM-style" punched cards along with automated equipment. When someone entered a toll way, for example, one would receive a punched ca...

I just disconnected the system, gently moved it to other place, connected it back and I can't boot C128 mode, c64 works OK when C= key is held. Please help.

I'm designing a Z80 based computer and I want to hook up LEDs to the data, address and control busses (for added cool value). So far, the design is gonna be something like this: One board that the Z80 and RAM sits on, then that plugs into a mainboard with LEDs and slots for cards which connect to...

I recently installed FreeDOS on an old laptop and then transferred some dosbox based GOG games I own to the FreeDOS installation. The problem is the manuals for these games is in PDF format and I cannot find a working DOS based PDF viewer. The one program I could find, called "psview" crashed an...