公开(公告)号：DE69122536T2

公开(公告)日：1997-04-17

申请号：DE69122536

申请日：1991-02-21

Applicant: IBM

Inventor： BERTRAM RANDAL LEE ,  CRUMP DWAYNE THOMAS ,  FORD JEFFREY VERNON ,  WELMAN GLENN EUGENE ,  WRIGHT JOHN PAUL

IPC: G06F1/24 ,  G06F9/06 ,  G06F9/445

Abstract: A computer system with read-only memory and permanent read/write memory provides the user with the capability of loading an alternate operating system at the conclusion of a session without turning the computer off and then on. A customization word with a system request (SR) bit is located in read/write memory and is set by routines located in ROM upon user request. A reinitialization is then forced which resets the SR bit and brings up the machine in the alternate operating system located in external memory on a diskette or fixed disk. A flexible initialization system is also disclosed providing customized initialization in a variety of operating systems and applications. The preferred customized initialization is maintained for future system start-ups due to the resetting of the SR bit.

公开(公告)号：DE69122536D1

公开(公告)日：1996-11-14

申请号：DE69122536

申请日：1991-02-21

Applicant: IBM

Inventor： BERTRAM RANDAL LEE ,  CRUMP DWAYNE THOMAS ,  FORD JEFFREY VERNON ,  WELMAN GLENN EUGENE ,  WRIGHT JOHN PAUL

IPC: G06F1/24 ,  G06F9/06 ,  G06F9/445

Abstract: A computer system with read-only memory and permanent read/write memory provides the user with the capability of loading an alternate operating system at the conclusion of a session without turning the computer off and then on. A customization word with a system request (SR) bit is located in read/write memory and is set by routines located in ROM upon user request. A reinitialization is then forced which resets the SR bit and brings up the machine in the alternate operating system located in external memory on a diskette or fixed disk. A flexible initialization system is also disclosed providing customized initialization in a variety of operating systems and applications. The preferred customized initialization is maintained for future system start-ups due to the resetting of the SR bit.