The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 27, 2001
Filed:
Nov. 10, 1998
Shyh An Chi, Tainan, TW;
Shisheng Shang, Kaohsiung, TW;
Abstract
In a fast response time pipelined data processor, an interrupt control device stores the interrupt service routine address or the target address of a branch instruction, as applicable, in a register. If an interrupt occurs while the pipelined data processor is processing a branch instruction, the branch instruction target address stored in the register is used as the return address, and is stored in a working space, so that the interrupt can be processed immediately. Similarly, if an interrupt occurs while the pipelined data processor is processing a prior interrupt or exception, and the first instruction of the interrupt service routine of the previous interrupt has not yet reached the memory access stage, the interrupt service routine as address of the previous interrupt stored in the register is used as the return address, and is stored in the working space, so that the next interrupt can be processed immediately.