7. Known bugs and problems

There are some known problems in OpenCBM:

• cbmcopy is still known to have some protocol races, especially with 1581 drives; thus, it does not always work reliably.
• cbmctrl detect as well as cbmcopy and d64copy do not recognize the drive type if some custom ROM is used.
• Windows: If you have any other devices connected to your parallel port, you cannot use them as long as cbm4win is installed. In this case, either remove OpenCBM whenever you want to access that other device, or install OpenCBM with instcbm --lock=no and make sure to issue cbmctrl lock before accessing the drive, and cbmctrl unlock afterwards.
• Windows: Third party PCI parallel port cards are problematic. In fact, I tried several, but none of them did work with OpenCBM on Windows currently. Anyway, I have had at least one positive report that this is possible. It seems the drivers for such parallel port cards do not specifically allow the interrupt to be routed to the PC, as most parallel devices nowadays do not need the interrupt. Unfortunately, this is not true for OpenCBM, which actually needs it!