Method of loading initial program in processor system

Details Method of loading initial program in processor system Method of loading initial program in processor system

2005-01-04

2005-01-04

Butler, Dennis M. (Department: 2115)

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

Loading initialization program

C713S001000, C710S010000

Reexamination Certificate

active

06839835

ABSTRACT:
In a processor system having a CPU, a RAM, and a communication portion for external communication, the operation of the central processing unit is stopped when an IPL operation mode is selected by an operation mode selection switch. An IPL program transferred from the outside through the communication portion is then written to the RAM starting from a predetermined address, and the stoppage of the operation of the CPU is thereafter canceled. The CPU restarting the operation executes the IPL program written to the RAM by first reading the predetermined address to download a system program. Since the IPL program is transferred from the outside, the IPL program to be used can be easily changed.

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patent: 5848296 (1998-12-01), Suzuki
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patent: 02238558 (1990-09-01), None
IBM, Initial Machine Load Process for Personal Computer Network System, Sep. 1, 1993, vol. 36, Issue 9B, pp. 541-542.

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