AIR 486EL - raskolnikov
28 April 2010
Contents
Problem Log
CMOS Battery Low error
After completing memory test and installing AHA-2742 BIOS extension, AIR 486EL mainboard self-test reports
CMOS Battery Low Press F1 to continue
The NVRAM is latched read-only when VCC falls below threshhold. Some setup values reset to defaults. If the values are changed and saved, they do not persist, even during warm reboot.
The internal battery in the Dallas DS1287 RTC has failed. Replace with DS12887 or rework part with external battery. Setup values must be reset, but EISA configuration remains intact.
No interrupt from FDC with ImageDisk
When attempting to do floppy disk drive operations, ImageDisk reports
No interrupt from FDC!
Do not attempt to run ImageDisk from an MS-DOS session under Windows.