How to Replace a CMOS Battery on IBM Personal Computer XT model year between 1980-87 It boot with ROM BASIC. its means no required Hard Disk or Floppy Disk for boot purposes.. Where is the location of CMOS Battery ? whether battery installed in power supply or motherboard ? I'm remembering and reading on the internet, that the original PC and PC-XT lacked a CMOS battery, and adapters such as AST SixPak allowed customers to add a battery backed clock to their PC. I think the original PC and PC-XT required the customer to enter the date and time on every boot. Thanks
johnnyhenderson replied
406 weeks ago