Question: How do I get my 756 modem to function in Linux 6.x? Answer: The CONFIG.OPTS file in Linux 6.x contains invalid memory addressing information. Edit the CONFIG.OPTS file and modify the line that reads: "include port 0x100-0x4ff, port 0x1000-0x17ff" to: "include port 0x100-0x4ff". You should also comment out the IBM Token Ring include line with a "pound" sign (#).