This is the Intel recommended exception handler: • Store the NPX environment (control, status, and tag words, operand and instruction pointers) as it existed a

This is the Intel recommended exception handler: • Store the NPX environment (control, status, and tag words, operand and instruction pointers) as it existed at the time of the exception. • Clear the exception bits in the status word. • Enable interrupts on the CPU. • Identify the exception by examining the status and control words in the save environment. • Take some system-dependent action to rectify the exception. • Return to the interrupted program and resume normal execution. and one of the examples for writing the handler is this: SAVE_ENVIRONMENT PROC ; ; SAVE CPU REGISTERS, ALLOCATE STACK SPACE FOR 80287 ENVIRONMENT PUSH BP MOV BP,SP SUB SP, 14 ; SAVE ENVIRONMENT, WAIT FOR COMPLETION, ; ENABLE CPU INTERRUPTS FNSTENV [BP-14] FWAIT STI ; ; APPLICATION EXCEPTION-HANDLING CODE GOES HERE ; ; CLEAR EXCEPTION FLAGS IN STATUS WORD ; RESTORE MODIFIED ; ENVIRONMENT IMAGE MOV BYTE PTR [BP-12] , 0H FLDENV [BP-14] ; DE-ALLOCATE STACK SPACE, RESTORE CPU REGISTERS MOV SP,BP POP BP ; ; RETURN TO INTERRUPTED CALCULATION IRET SAVE_ENVIRONMENT ENDP Make of that as you like. I am somewhat curious about what happened here.