Method and device for carrying out a function assigned to an instruction code
US6339820B1 · kind B1 · utility
10Cited by
6References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | Jan 15, 2002 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/45504
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A space-efficient and flexible mechanism for implementing a virtual machine in a resource-constrained environment such as a smartcard is proposed. The virtual machine is designed for interpreting or carrying out instructions which are identified by an instruction code, also called opcode. Both, the addresses, respectively identifiers, of the functions implementing the instruction codes, respectively opcodes, which the virtual machine interprets, as well as parameters to those functions are kept within lookup tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.