============================================================================= AST RESEARCH, INC. TECHNICAL BULLETIN #0728 12-26-91 ============================================================================= AST BRAVO 486/25 VIDEO BIOS ERRORS DURING POST PROBLEM: When using a third party video card as the primary video in an AST Bravo 486/25, the following error message will be displayed during POST: "Cannot shadow video BIOS in shadow ram" "Press F1 key to continue or CTRL-ALT-ESC to setup" AFFECTED SYSTEMS: Bravo 486/25 system board with the following part number: 202385-001 CAUSE: System BIOS Rel 1.10 does not have the option to disable the shadow BIOS. SOLUTION: This problem has been resolved with release 1.20 of the system BIOS. This system BIOS consist of two chips, part number 237801-003 and 237802-003 revision A. Customers experiencing the above problem should have the system BIOS upgraded.