| slovo | definícia |
superzap
(foldoc) | SuperZap
An IBM utility program used to quickly patch
{operating
system} or application program executable code or disk VTOCs in
preference to editing the source code and recompiling. SuperZap
could write
data given as a string of hex digits to a given disk location in a
matter of
seconds.
The SuperZAP program was a quick hack written by one IBM
Engineer, possibly from IBM UK, in the late 1960s to directly
fix executable files. He needed to fix a bug but it would
have taken hours to rebuild the vast OS/360 executables.
Soon the IBM development labs were releasing all Programming
Temporary Fixes (PTFs) to OS/360 in this form. OS/360
included a version called IMASPZAP or AMASPZAP which persisted
through MVS, MVS/SP, MVS/XA, OS/390 and probably still
remains in z/OS, the distant descendent of OS/360.
The program name owed less to its use of the Zero and Add Packed
(ZAP)
instruction and more to SF films in which aliens were zapped with
lasers.
[2004-02-05 e-mail from Chris Gage and 2015-01-03 email
from Ray Saunders, both IBM employees and SuperZap users].
(2021-03-21)
|
| | podobné slovo | definícia |
superzap
(foldoc) | SuperZap
An IBM utility program used to quickly patch
{operating
system} or application program executable code or disk VTOCs in
preference to editing the source code and recompiling. SuperZap
could write
data given as a string of hex digits to a given disk location in a
matter of
seconds.
The SuperZAP program was a quick hack written by one IBM
Engineer, possibly from IBM UK, in the late 1960s to directly
fix executable files. He needed to fix a bug but it would
have taken hours to rebuild the vast OS/360 executables.
Soon the IBM development labs were releasing all Programming
Temporary Fixes (PTFs) to OS/360 in this form. OS/360
included a version called IMASPZAP or AMASPZAP which persisted
through MVS, MVS/SP, MVS/XA, OS/390 and probably still
remains in z/OS, the distant descendent of OS/360.
The program name owed less to its use of the Zero and Add Packed
(ZAP)
instruction and more to SF films in which aliens were zapped with
lasers.
[2004-02-05 e-mail from Chris Gage and 2015-01-03 email
from Ray Saunders, both IBM employees and SuperZap users].
(2021-03-21)
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