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The MIL-STD-1750B was to be a successor architecture to the MIL-STD-1750A, with added and expanded features, some of which were optional. By the mid-1980s there was a published draft of the 1750B available, and some vendors began implementations for it. However, no finalized specification was ever
204:
Because MIL-STD-1750A does not define implementation details, 1750A products are available from a wide variety of companies in the form of component, board, and system-level offerings implemented in myriad technologies, often the most advanced and exotic of their respective periods (e.g.
390:
In addition, DDC-I provides its SCORE Integrated
Development Environment (IDE) with both Ada95 and C compilers, and TADS (Tartan Ada Development System) Ada83 development environment, both targeting processors based on MIL-STD-1750A.
151:
Most instructions are 16 bits, although some have a 16-bit extension. The standard computer has 16 general purpose 16-bit registers (0 through 15). Registers 1 through 15 can be used as
475:
Fully space-rated implementations make the 1750A one of the few types of computers that are applicable for use in deep space applications. Example spacecraft that use the 1750A are:
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1750A systems often offer high levels of protection from radiation and other hazardous environments, making them particularly suited for military, aviation and space applications.
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that allows 2 16-bit words of memory using 512 page mapping registers (in the I/O space), defining separate instruction and data spaces, and keyed memory access control.
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and comprising the
Central Electronics Sub-Assembly and Antenna Sub-Assembly used a total of 42 GEC-Plessey MA31750A processors in a dual-redundant configuration
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HX1750, fabricated on
Honeywell's Silicon on Insulator CMOS (SOI-IV) process giving radiation hardness. The HX1750 includes an FPU and peripherals on chip.
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188:. I/O is generally via the I/O instructions (XIO and VIO), which have a separate 2 16-bit word address space and may have a specialized bus.
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defined the standard in order to have a common computing architecture and thereby reduce the costs of software and computer systems for all
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needs. This includes embedded tasks such as aircraft and missile control systems as well as more mundane general military computing needs.
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The advantages of this concept are recognized outside of the USAF, and the 1750A has been adopted by other organizations such as the
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RH1750, a radiation-hardened version for aerospace and space flight applications. GEC-Plessey, under its previous iteration as
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Electronic
Devices, also initially developed the MAS281 and MA31750A series of processors, later made available through
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issued for the 1750B, as military and industry attention shifted to 32-bit architectural alternatives such as the
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contain support for MIL-STD-1750A; it was declared obsolete in version 3.1, and removed in subsequent versions.
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81:
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316:(MMU), the P1754 Processor Interface Chip (PIC) and the P1757ME Multi-Chip Module. This line was passed to
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McDonnell-Douglas MD-281. A radiation hardened SoS three-die implementation on a 64-pin multichip module.
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The 1750A supports 2 16-bit words of memory for the core standard. The standard defines an optional
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Software vendor from the 1980s offering cross-compilers from three language languages to the 1750A
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The computer has instructions for 16- and 32-bit binary arithmetic, as well as 32- and 48-bit
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486:
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173:), but only register 15 is used as the stack pointer for the PSHM and POPM instructions (
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architecture (ISA), including both required and optional components, as described by the
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document MIL-STD-1750A (1980). Since August 1996, it has been inactive for new designs.
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660:"Onboard processor validation for space applications - IEEE Conference Publication".
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In addition to the core ISA, the definition defines optional instructions, such as a
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632:"An Implementation of MIL-STD-1750 Airborne Computer Instruction Set Architecture"
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330:
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ftp://ftp.elet.polimi.it/users/Marco.Lovera/ESAGNC08/S08/07_Veeraraghavan.pdf
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309:
269:
807:"Software Considerations for Interfacing Avionics Computers and Mux Buses"
312:. The family includes the P1750A CPU, the P1750AE Enhanced CPU, the P1753
279:(JHU/APL) MIL-STD-1750AAV space flight qualified processor. A multi-board
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Bound copy, from the 1980s, of the MIL-STD-1750A specification document
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designed to give existing applications a late life performance boost.
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ISRO Space
Recovery Experiment-1 Guidance and Navigation Computer
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implementation on a 64-pin multichip module with an optional MMU.
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Midcourse Space
Experiment (MSX) spacecraft developed at JHU/APL
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instruction set, but was adapted to run MIL-STD-1750A using new
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compilers, for example
Cleanscape XTC-1750A. Older versions of
381:
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IDE, Ada95, EC++ and ANSI C compilers for the 1750A processor
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Processors based on MIL-STD-1750A are often programmed in
155:. Registers 12 through 15 can be used as base registers.
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FlightLinux
Project Target Architecture Technical Report
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Digital Flight
Control System and Fire Control Computer
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Examples of military aircraft using the 1750A include:
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813:
Vol. 95, Section 7: Aerospace (1986), pp. 63–68.
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implementation specifically designed for space flight.
614:"mas31750 DataSheet - PDF - www.BestDatasheets.com"
223:Examples of MIL-STD-1750A implementations include:
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80:
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65:
55:
47:
37:
29:
21:
304:P1750A. The PACE normally runs a version of the
109:is the formal definition of a 16-bit computer
8:
576:commercial communication satellite platforms
16:
880:Pyramid Semiconductor P1750A-SOS Processor
840:(HTML), with updated Notice 1, 21 May 1982
441:(used in various roles including the USAF
834:(PDF), with updated Notice 1, 21 May 1982
158:Any of the 16 registers can be used as a
530:ISRO GSAT/INSAT/IRS series of spacecraft
324:Royal Aircraft Establishment Farnborough
910:Military of the United States standards
605:
320:and then Pyramid Semiconductor in 2003.
854:Ada83 compiler for the 1750A processor
738:: CS1 maint: archived copy as title (
731:
690:
679:
505:- Envisat's ASAR instrument, built by
230:CPU1750A-FB, a high performance 1750A
15:
875:Dynex Semiconductor MA31750 Processor
7:
849:Specification and vendor information
363:United States Department of Defense
915:Radiation-hardened microprocessors
165:for the SJS and URS instructions (
14:
422:, and many projects in academia.
289:Electronic Devices MIL-STD-1750A.
200:Performance Semiconductor P1750AE
326:MIL-STD-1750A implementation in
871:References to use in spacecraft
1:
296:Fairchild Semiconductor F9450
574:Orbital Sciences Corporation
466:RFCS Flight Control Computer
844:Software Vendor Information
666:10.1109/ICACCI.2015.7275677
420:Israeli Aircraft Industries
302:National Semiconductor PACE
936:
569:GOES-13, GOES-O and GOES-P
560:Naval Research Laboratory
277:Applied Physics Laboratory
838:DOD MIL-STD-1750 standard
832:DOD MIL-STD-1750 standard
827:DOD MIL-STD-1750 standard
533:ISRO Mars Orbiter Mission
452:Apache Longbow Helicopter
318:Performance Semiconductor
275:Johns Hopkins University
171:unstack return subroutine
96:Optional in specification
864:Ada and ANSI C compilers
439:AP-102 Avionics Computer
238:Delco Systems Operations
920:16-bit microprocessors
895:Instruction processing
689:Cite journal requires
365:which is derived from
350:
314:Memory Management Unit
240:Magic V 1750 Processor
201:
146:memory management unit
141:
412:European Space Agency
348:
199:
167:stack jump subroutine
139:
556:Mars Global Surveyor
359:programming language
228:CPU Technology, Inc.
43:CMOS, GaAs, ECL, SoS
507:Matra Marconi Space
436:IBM Federal Systems
281:silicon on sapphire
265:Dynex Semiconductor
244:Dynex Semiconductor
61:16-bit instructions
18:
905:Avionics computers
900:Military computers
805:S. Lloyd Plehaty,
618:bestdatasheets.com
405:military computing
373:was heavily used.
351:
248:radiation hardened
202:
142:
582:Guidance Computer
445:avionics upgrade)
306:Data General Nova
115:military standard
100:
99:
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811:SAE Transactions
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714:. Archived from
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638:. Archived from
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709:"Archived copy"
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542:MSTI-1, 2 and 3
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376:There are also
361:defined by the
357:, a high-level
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194:
192:Implementations
153:index registers
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111:instruction set
82:General-purpose
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821:External links
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691:|journal=
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551:NASA Landsat 7
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786:"Orbital ATK"
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765:"Orbital ATK"
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721:on 2014-09-01
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642:on 2011-08-23
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564:Lunar Orbiter
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526:Venus Express
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175:push multiple
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103:MIL-STD-1750A
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723:. Retrieved
716:the original
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682:cite journal
655:
644:. Retrieved
640:the original
635:
626:
617:
608:
590:
580:USAF Titan-4
520:Mars Express
474:
471:Use in space
424:
409:
398:
389:
375:
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222:
219:
203:
183:
179:pop multiple
178:
174:
170:
166:
157:
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143:
119:
106:
102:
101:
793:orbital.com
772:orbital.com
395:Deployments
341:Programming
336:technology.
257:GEC-Plessey
86:16 × 16-bit
889:Categories
725:2014-09-23
646:2010-06-10
600:References
594:MIPS R3000
562:Clementine
246:MAS281. A
66:Extensions
30:Introduced
369:. Later,
334:bit-slice
310:microcode
270:Honeywell
132:Internals
75:Registers
734:cite web
674:16385798
636:dtic.mil
448:US Army
430:IAI Lavi
367:ALGOL 58
69:FPU, MMU
57:Encoding
547:Cassini
514:Rosetta
503:Envisat
497:Cluster
432:fighter
298:series.
287:Marconi
261:Marconi
163:pointer
672:
462:USN
450:AH-64D
355:JOVIAL
39:Design
25:16-bit
789:(PDF)
768:(PDF)
719:(PDF)
712:(PDF)
670:S2CID
587:1750B
567:NOAA
554:NASA
545:NASA
491:Terra
455:USAF
443:F-111
160:stack
107:1750A
17:1750A
740:link
695:help
524:ESA
518:ESA
512:ESA
501:ESA
495:ESA
489:and
487:Aura
483:Aqua
464:F-18
457:F-16
416:NASA
399:The
331:2901
207:GaAs
177:and
169:and
124:and
51:CISC
48:Type
33:1980
22:Bits
662:doi
480:EOS
385:GCC
382:GNU
371:Ada
328:AMD
251:SOC
232:SOC
217:).
215:SoS
211:ECL
181:).
126:MMU
122:FPU
105:or
891::
809:,
791:.
770:.
736:}}
732:{{
686::
684:}}
680:{{
668:.
634:.
616:.
596:.
485:,
418:,
414:,
213:,
209:,
795:.
774:.
742:)
728:.
697:)
693:(
676:.
664::
649:.
620:.
378:C
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
