GB1324154A - Data processing systems - Google Patents

Data processing systems

Info

Publication number
GB1324154A
GB1324154A GB5926671A GB5926671A GB1324154A GB 1324154 A GB1324154 A GB 1324154A GB 5926671 A GB5926671 A GB 5926671A GB 5926671 A GB5926671 A GB 5926671A GB 1324154 A GB1324154 A GB 1324154A
Authority
GB
United Kingdom
Prior art keywords
instructions
programme
source
routine
sub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5926671A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1324154A publication Critical patent/GB1324154A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45504—Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators

Abstract

1324154 Data processing INTERNATIONAL BUSINESS MACHINES CORP 21 Dec 1971 [21 Jan 1971] 59266/71 Heading G4A A digital electric data processing system is adapted to execute a source programme written for a different type of system and not directly executable by the first mentioned system. Analysis of selected programme instructions causes the first mentioned system to be controlled by a group of instructions which replace a group of instructions in the source programme and inhibit analysis of instructions within the replaced group. In a first embodiment (Fig. 4), a source programme comprises a programme sequence A1-Aa having a sub-routine B1-Bb and a simulator programme having a main routine S1-S12 and sub-routines T1-Tt, V1-Vv &c. The simulator programme goes through the source programme instructions one by one but when it comes to certain marked instructions, e.g. B1, B1 is replaced by an instruction B<SP>1</SP>l. B<SP>1</SP>l would be an invalid instruction for the source routine but it causes the group of instructions B1-Bb to be replaced by instructions X1-Xx which are then executed. This is stated to save time in that the instructions B1 to Bb do not have to be analysed individually. In one embodiment (Fig. 5, not shown) the source programme instructions calling for the sub-routine are modified and in another embodiment (Fig. 6, not shown) the simulator determines from analysis of the instructions and, if required, of the adjoining instructions, whether the instruction is calling for a standard subroutine. If it is, the sub-routine is replaced.
GB5926671A 1971-01-21 1971-12-21 Data processing systems Expired GB1324154A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7102569A FR2122802A5 (en) 1971-01-21 1971-01-21

Publications (1)

Publication Number Publication Date
GB1324154A true GB1324154A (en) 1973-07-18

Family

ID=9070928

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5926671A Expired GB1324154A (en) 1971-01-21 1971-12-21 Data processing systems

Country Status (2)

Country Link
FR (1) FR2122802A5 (en)
GB (1) GB1324154A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262367A (en) * 1991-12-13 1993-06-16 Uken Interfacing of computer operating systems.
US6128590A (en) * 1996-07-09 2000-10-03 Siemens Nixdorf Informationssysteme Aktiengesellschaft Method for the migration of hardware-proximate, subprogram-independent programs with portable and non-portable program parts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2262367A (en) * 1991-12-13 1993-06-16 Uken Interfacing of computer operating systems.
US6128590A (en) * 1996-07-09 2000-10-03 Siemens Nixdorf Informationssysteme Aktiengesellschaft Method for the migration of hardware-proximate, subprogram-independent programs with portable and non-portable program parts

Also Published As

Publication number Publication date
FR2122802A5 (en) 1972-09-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee