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Contrib
[88]
Статьи, взятые из разных источников.
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My atticle
[2]
Статьи,написаные лично мною
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Forex
[22]
Всё о заработке на рынке FOREX
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Всего материалов в каталоге: 112
Показано материалов: 71-80 |
Страницы: « 1 2 ... 6 7 8 9 10 11 12 » |
Evolution of the PDP-11 family of computers. |
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The PDP-11, as the PDP-8 before it, was cloned and copied
extensively behind the so-called Iron Curtain. A number of plants
produced PDP-11 compatible systems in the Soviet Union, including
Elektronika-79 (11/70) and several machines without direct DEC
analogues (DWK-4 with proprietary video controller). |
The PDP-11 Maintenance Panel was introduced with the 11/20. It comprised
of two single height boards, a lamp driver and a lamp/switch board.
Through the use of the four switches, the processor clock could be
interrupted and single stepped through the ISR and BSR timing states of
the 11/20. Timing state numbers, Condition Codes and certain other flags
were displayed on the maintenance panels 16(?) lamps. Of course, having
the machine frozen in suspended animation also facilitated the
troubleshooting of the internal circuits by oscilloscope.
On the 11/40 there were two slots into which a maintenance panel could
be plugged. In the first slot you could single step the processor clock
and cycle through the microcode program. The processor could be made to
stop at a specific microcode address (MPC) set in the front panel
switches. The panel could be plugged into a different slot and perform
the same function for the Floating Point Processor. If you thought that
the PDP-11 had wide and complex micro-instructions, you should have
seen the FPP! |
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The instruction set of the PDP-11 was designed towards a clean,
general, symmetric instruction set. It can be used as a
register-based, stack-based, or memory-based machine, depending
on the programmer's preferences. Interrupt responsiveness is
also important, supported with multiple interrupt levels for
real-time computing as well as allowing for a separate interrupt
handler for each device that generates interrupts. |
ere's an excerpt from an old Micronote (#039) (Thanks Richard Wallace)
+---------------+ +-----------------+
| d i g i t a l | | uNOTE # 039 |
+---------------+ +-----------------+
+----------------------------------------------------+-----------------+
| Title: Differences between KDJ11-A and KDJ11-B | Date: 8-Aug-85 |
+----------------------------------------------------+-----------------+
| Originator: Peter Kent | Page 1 of 5 |
+----------------------------------------------------+-----------------+ |
Международная выставка на ВДНХ СССР "Вычислительная техника и информатика-89"
В.С. Грязнов, И.А. Данильченко
С 29 мая по 11 июня 1989 г. в Москве на ВДНХ СССР
проводилась Международная выставка "Вычислительная техника и
информатика-89", которая была посвящена 20-летию сотрудничества
социалистических стран в области разработки, производства и применения
средств вычислительной техники .
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СМ ЭВМ. Детальный обзор.СМ ЭВМ была построена как агрегатная система
технических и программных средств вычислительной техники, нормативного, методического
и эксплуатационного обеспечения и стандартов, позволившая добиться рациональной
совместимости и унификации системных, архитектурных, схемотехнических и
конструктивных решений.
Разработанные принципы технологии и стандарты СМ ЭВМ
охватывали все аспекты унификации элементов, узлов и устройств, конструкций,
моделей ЭВМ, программных средств с учетом технологии и мощности отечественной
промышленности и позволили организовать крупносерийное производство.
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