<
computer> The generic name for the
CPUs and architecture
released by
IBM on 1964-04-07. The 360 was marketed as a
general purpose computer with 'all round' functionality -
hence 360 (degrees).
Models ranged from the 360/20 to the 360/65 and later the
360/95, with typical memory configurations from 16K to 1024K.
Elements of the architecture, such as the basic {instruction
set} are still in use on
IBM mainframes today. Operating
System/360 (
OS/360) was developed for
System/360. Other
associated
operating systems included
DOS,
OS/MFT and
OS/MVT.
The 360 architecture was based on an 8-bit
byte, 16 general
purpose
registers, 24-bit addressing, and a PSW (Program
Status Word) including a location counter.
Gene Amdahl, then an
IBM employee, is generally acknowledged
as the 360's chief architect. He later went on to found
Amdahl Corporaton, a manufacture of
PCM mainframe
equipment.
The 360's predecessors were the smaller
IBM 1401 and the
large
IBM 7090 series. If was followed by the
IBM 370.
See also
ABEND,
ALC,
BAL,
Big Red Switch,
HCF, {mode
bit},
PL360,
PL/S.
(2004-06-06)