[-- Attachment #1.1: Type: text/plain, Size: 106 bytes --] I have not seen this before. Nice article on porting Unix includes an 8086 CPU. Ken -- WWL 📚 [-- Attachment #1.2: Type: text/html, Size: 392 bytes --] [-- Attachment #2: UNIX_Operating_System_Porting_Experiences.pdf --] [-- Type: application/pdf, Size: 55990 bytes --]