"Free on-line dictionary of computing" - читать интересную книгу автора (Howe D.)

{coroutine}s.

["The 2.PAK Language: Goals and Description", L.F. Melli, Proc
IJCAI 1975].

(1995-01-25)

320xx

A series of {microprocessors} from {National
Semiconductor}. The 320xx processors have a {coprocessor}
interface which allows coprocessors such as {FPU}s and {MMU}s
to be attached in a chain.

The 320xx was the predecessor of the {Swordfish} processor.

[Details?]

(1994-11-17)

3270

{IBM 3270}

32-bit application

{IBM PC} software that runs
in a 32-bit {flat address space}.

The term {32-bit application} came about because {MS-DOS} and
{Microsoft Windows} were originally written for the {Intel
8088} and {80286} {microprocessors}. These are {16 bit}
microprocessors with a {segmented address space}. Programs
with more than 64 kilobytes of code and/or data therefore had
to switch between {segments} quite frequently. As this
operation is quite time consuming in comparison to other
machine operations, the application's performance may suffer.
Furthermore, programming with segments is more involved than
programming in a flat address space, giving rise to some
complications in programming languages like "{memory models}"
in {C} and {C++}.

The shift from 16-bit software to 32-bit software on {IBM PC}
{clones} became possible with the introduction of the {Intel
80386} microprocessor. This microprocessor and its successors
support a segmented address space with 16-bit and 32 bit
segments (more precisely: segments with 16- or 32-bit address
offset) or a linear 32-bit address space. For compatibility
reasons, however, much of the software is nevertheless written
in 16-bit models.

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