That did the trick 😀 Set some stopping points for debugging in disney_write and the disney.data of the current instance contains my data. I think I just go from here with remodeling disney/covox stuff. Thank you very much 😀 Can anyone close this thread or mark it as solved?

Sadly it then doesn't forward (at which port the internal LPT-Device would have to be configured then?) after disabling COVOX/DISNEY in config. Is there any premade Code, which lists all port Communication between the DOSbox and the running program (With sent data and port). If not, where would such …

Well I am propably confusing you (I'm not a native speaker, neither writer :)) Chain is as follows: Normal: Test programm decides to sent a byte (let's say 01110111) to LPT1 -> it sents 0x77 (byte above) to the port 0x378 Dosbox catches that and internally forwards byte 0x77 to an instance of device …

The USB-LPT device is developed by me and my classmates, so we know it's working :). Currently, it's only about getting the data out of the dosbox. I have no LPT-port attached, so i doubt intereference is the issue here. The dosbox is playing audio signals (verified with several computers) which are …

Hi, i'm currently developing an LPT-Drive within DOSBOX to fit an FT245 Chip to use directly for CNC-Stepmotor-Control. When I run my CNC-Program (developed by a friend in the early 90s - no source available), the output seems to go to the speakers (even with standard DOSBOX). At least my speakers …