I have an ancient POS printer Axhiohm A470 http://www.racoindustries.com/axa470.htm. Windows 7 64bit doesn't detect this printer and drivers don't exist. Only way to print (text mode only) is to send print job directly to LPT. After some digging I found that it's pretty easy. Only thing you have to do is correctly create file LPT1 and write to it.
Now I would like to take one step further and send print job to second feeder. First one is roll of paper inside the printer (prints receipt). This one prints by the code above (it's called validation or something like that). Second one is a slit that is used to put in another receipt. I don't know how to send print job there.
If you think you can help me but don't understand what am I saying (it sounds a little bit cryptic) just ask and I try to make it more clear.
The thing is that the there are two pieces that have to open first before you can put receipt in to validate. I guess, the printer has to receive some command to do that but I have no idea what that would be.