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- Expires: 31 May 2004 11:22:46 GMT
- X-Last-Updated: 1996/01/12
- From: rboys@best.com
- Newsgroups: comp.arch.bus.vmebus,comp.answers,news.answers
- Subject: comp.arch.bus.vmebus Frequently Asked Questions (FAQ)
- Followup-To: comp.arch.bus.vmebus
- Organization: myself
- Reply-To: r.boys@genie.geis.com
- Approved: news-answers-request@MIT.EDU
- Summary: This posting contains a list of Frequently Asked Questions and
- other information about the VMEbus computer system. The
- VMEbus is an industrial grade open systems bus specification.
- This FAQ contains general information about the VMEbus and
- VXIbus specifications, where to obtain further information and
- answers to questions often asked on comp.arch.bus.vmebus.
- Originator: faqserv@penguin-lust.MIT.EDU
- Date: 17 Apr 2004 11:26:48 GMT
- Lines: 775
- NNTP-Posting-Host: penguin-lust.mit.edu
- X-Trace: 1082201208 senator-bedfellow.mit.edu 568 18.181.0.29
- Xref: senator-bedfellow.mit.edu comp.arch.bus.vmebus:5931 comp.answers:56853 news.answers:269777
-
- Archive-name: computer-arch/bus/vmebus-faq
- Posting-Frequency: monthly
- Last-modified: 1996/01/05
- Version: 9.0
-
- Frequently Asked Questions
- comp.arch.bus.vmebus
-
- This list is maintained by:
- Robert Boys
- San Jose, California
- formerly of Guelph, Ontario, CANADA
-
- Email: r.boys@genie.geis.com
- or
- rboys@best.com
-
- January 05, 1996
- Version # 9
-
- =======================================================================
- =======================================================================
- = =
- = I am finally updating this FAQ ! I have been fairly busy. :-) =
- = =
- = I hope all of you reading this, your families and friends had a =
- = wonderful and peaceful Christmas and New Year holiday wherever =
- = you may happen to live in the world. I wish that all of you =
- = have a continuing prosperous and safe 1996. =
- = =
- = As you may have noticed in my header - I have moved from the land =
- = of ice and snow (Canada) to sunny California. =
- = I now work for Hitex Development Tools - aka HiTOOLS Inc. =
- = They sell emulators and such. Watch for me at trade shows. =
- = VMEbus, M68K and HC11 info may now be sent to rboys@hitex.com =
- = =
- = I have a new Homepage- http://www2.best.com/~rboys in California =
- = The latest version of this FAQ will be stored there - i.e. the =
- = "work in process" version. I will be getting the site running =
- = in the next few weeks. This is also true for the FAQ for the M68k =
- = My backup Homepage is http://www.sentex.net/~rboys in Canada =
- = =
- = This FAQ is also stored on: =
- = http://www.hitex.com/automation/FAQ/vmefaq (California) =
- = http://www.ba-karlsruhe.de/automation/FAQ/vmefaq (Germany) =
- = http://www.ee.ualberta.ca/archive/vmefaq (Western Canada) =
- = =
- = You can get this entire FAQ with graphics by pointing your browser =
- = at the indicated Web pages and looking for the file vmefaq.zip. =
- = =
- =======================================================================
- =======================================================================
-
- The information contained in this FAQ is believed to be correct and up
- to date. Every effort has been made to ensure accuracy. The maintainer
- cannot be responsible for errors and omissions. This article is
- copyright (c) 1996 and all rights are reserved.
- This article may be reprinted provided it is intact, proper credit is
- given and no cost is levied. Contact the author for permissions.
-
- What's New! new parts are indicated with a ]
- ------------
-
-
- * US$150 C compiler offer from Introl Corp (non-commercial license)
- is now available in a Windows 95 version. http://www.introl.com
-
- * John Black's book - The Systems Engineer's Handbook is now only $60
-
- * Test & Measurement World magazine now has VXIbus information.
-
- * The VME64 mailing list has a new address.
-
-
- CONTENTS:
- ==========
-
- 1) The USENET Newsgroup comp.arch.bus.vmebus
-
- 2) The VMEbus - Technical Information
- A) The VMEbus - Introduction
- B) The VMEbus - Description
- C) DIN Connector Assignments
- D) VME64 - a new standard
-
- 3) The VXIbus - Technical Information
- A) The VXIbus - Introduction
- B) The VXIbus - Description
- C) DIN Connector Assignments
-
- 4) Information Sources
- A) VMEbus Systems Magazine
- B) VXI Journal
- C) Real Time Engineering
- D) Micrology pbt, Inc.
- E) VITA - VMEbus International Trade Association
- F) Computer Design
- G) Test & Measurement World
- H) The Manufacturers
- I) Unadvertised ftp and WWW Sites
-
- 5) Answers to Frequently Asked Questions
- A) Newbridge Microsystems
- B) Battery Clocks - MK48TO2B-xx
- C) Where does the name "VME" come from?
-
- 6) Profiles
-
- ////////////////////////////////////////////////////////////////////////
-
- 1) The USENET Newsgroup comp.arch.bus.vmebus
- ===============================================
- The questions that appear on this newsgroup generally pertain to
- specific technical questions that are beyond the scope of a FAQ, about
- where to locate information about the VMEbus, where to find boards to
- perform specific functions or the addresses of VMEbus manufacturers.
- Many manufacturers of VMEbus equipment and associated products and
- services monitor this newsgroup on a regular basis. They include:
-
- Motorola Newbridge EKF Elektronik
- Heurikon VITA Micrology pbt
- DY 4 RadiSys Schroff, Inc
- VMIC - VME Microsystems International Corp.
- Radstone Technology PLC (UK) Themis Computer
- Titan Electronics (San Diego) et al
- your firm name here (email me)
-
- The latest version of this FAQ is archived at:
- http://www.ee.ualberta.ca/archive/vmefaq.html
- or
- http://www.hitex.com/automation/FAQ/vmefaq (California)
- http://www.ba-karlsruhe.de/automation/FAQ/vmefaq (Germany)
- ftp://nyquist.ee.ualberta.ca/pub/motorola/general/vmefaq
- The working copy is on my Homepage - http://www.sentex.net/~rboys
-
- You can retrieve the entire HTML FAQ with the .gif files by pointing
- your browser at the above sites and look for vmefaq.zip
-
- 2) The VMEbus - Technical Information
- ========================================
-
- A) The VMEbus - Introduction
- ------------------------------
- VMEbus modules are state of the art products and are used to construct
- very powerful and rugged computer systems. The VMEbus is an industrial
- open standard system. VMEbus boards have data bus sizes of 16, 32 or 64
- bits and are designed to be plugged into a backplane that has up to 21
- slots for other boards. These other boards can be CPU boards or
- peripheral boards providing various functions.
-
- The VMEbus standard originated with the Motorola VERSAbus in 1979 which
- was designed using the then new MC68000 microprocessor. The VMEbus
- signals are patterned after the M68000 bus signals and timing. VMEbus
- boards now contain processors such as DEC Alpha, MIPS, i960, various DSP
- chips, AM29000 (RISC chip), PowerPC and 80486 in addition to the
- Motorola 680x0 line. Many peripheral boards exist including VGA,
- telecommunication, analyzers, data acquisition, video processors and
- memory (1 gigabyte!). The VMEbus originated in 1981.
-
- The VXIbus is an instrumentation bus compatible (sort-of) with the
- VMEbus. The VMEbus specification specifies the physical dimensions of
- the boards, backplane and the chassis as well as the electrical
- specifications of the bus and various communication protocols.
-
- In addition to the VMEbus, the VXIbus and Futurebus+ will be covered in
- this document in the future.
-
- A PMC (PCI Mezzanine Card) is a proposed IEEE specification for a low
- profile mezzanine expansion bus for VMEbus, Multibus II and Futurebus+
- systems. It has a 32 or 64 bit bus and has the same electrical
- specifications as the PCI bus (Peripheral Interconnect Bus).
-
- There are over 200 vendors supplying products to the VMEbus community.
- VMEbus suppliers are most active in the USA, Germany and Canada and
- range from large corporations to small custom shops. Specifying a
- VMEbus system releases the user from the expensive, time consuming and
- sometimes (often) risky business of in-house hardware design.
-
- Information resources for the VMEbus come mainly from three sources:
- VITA, the VMEbus Systems Magazines edited by John Black and the
- manufacturers. All prices quoted are in US dollars.
-
- B) The VMEbus - Description
- -----------------------------
- A VMEbus board can be either single or double height. A single height
- board is 100mm x 160mm with one 96 pin DIN 41612 connector called P1 on
- the rear that plugs into the backplane. A double height board is 233mm
- x 160mm and may have a second 96 pin DIN connector named P2. A single
- height board is also known as a 3U and a double height a 6U. There are
- 9U boards in existence but they are not part of the VMEbus
- specification. The front edge or face of a typical board is 20mm wide
- and may incorporate RS-232 connectors, indicator lights and switches.
-
- The backplane can have up to 21 slots providing the J1 connectors for
- the boards to plug into. The J2 connectors (if required) can be
- supplied with a second backplane board or in one piece with both J1 and
- J2 connectors. A J1 (on the backplane) matches to a P1 (on the board)
- and a J2 to a P2. The spacing between slots is 20.32 mm (0.8 inches).
-
- Power is supplied to the VMEbus board through P1 and P2 (if used). The
- DIN plugs used are arranged in three rows (A, B, C) of 32 pins on 0.1
- inch centres. These plugs are approximately 0.85 mm wide and 84 mm
- long.
-
- P1 supports 16 and 24 bit addressing and 8 and 16 bit data paths. P2
- uses the centre 32 pins to support full 32 bit data and addressing
- paths. The two outer rows of P2 are user defined and are used for i/o
- ports, disk drives and other external peripherals.
-
- C) DIN Connector Assignments
- ------------------------------
- ========================================================================
- J1/P1 Pin J2/P2 Pin
- Assignments Assignments
- ------------------------------------------------------------------------
- Pin # Row A Row B Row C Row B
-
- 1 D00 BBSY* D08 +5v
- 2 D01 BCLR* D09 GROUND
- 3 D02 ACFAIL* D10 RESERVED
- 4 D03 BG0IN* D11 A24
- 5 D04 BG0OUT* D12 A25
- 6 D05 BG1IN* D13 A26
- 7 D06 BG1OUT* D14 A27
- 8 D07 BG2IN* D15 A28
- 9 GROUND BG2OUT* GROUND A29
- 10 SYSCLK BG3IN* SYSFAIL* A30
- 11 GROUND BG3OUT* BERR* A31
- 12 DS1* BR0* SYSRESET* GROUND
- 13 DS0* BR1* LWORD* +5V
- 14 WRITE* BR2* AM5 D16
- 15 GROUND BR3* A23 D17
- 16 DTACK* AM0 A22 D18
- 17 GROUND AM1 A21 D19
- 18 AS* AM2 A20 D20
- 19 GROUND AM3 A19 D21
- 20 IACK* GROUND A18 D22
- 21 IACKIN* SERCLK* A17 D23
- 22 IACKOUT* SERDAT* A16 GROUND
- 23 AM4 GROUND A15 D24
- 24 A07 IRQ7* A14 D25
- 25 A06 IRQ6* A13 D26
- 26 A05 IRQ5* A12 D27
- 27 A04 IRQ4* A11 D28
- 28 A03 IRQ3* A10 D29
- 29 A02 IRQ2* A09 D30
- 30 A01 IRQ1* A08 D31
- 31 -12V +5V STDBY +12V GROUND
- 32 +5V +5V +5V +5V
- =======================================================================
- Notes:
- 1) J2/P2 Rows A and C are user defined. They are specified in the
- VXIbus which is one reason why the VXIbus and VMEbus are not totally
- compatible.
-
- 2) A01 to A31 is the address bus. Notice it is similar to the MC68000
- scheme ie without A0. DS0* and DS1* (DS = Data Strobe) specify the
- upper or lower portion of the data bus. (rather than having a A0) See
- the FAQ for comp.sys.m68k for a discussion of this issue.
-
- 3) * means an active low signal.
-
- D) VME64 - a new standard
- ---------------------------
- The regular VMEbus standard accommadates 32 bit address and data buses.
- Data transfers are 32, 16 and 8 bytes wide. One type of data transfer,
- called a Block Transfer, allow up to 256 bytes to be transferred with
- only the start address placed on the address bus once. For the rest of
- the transfer, the address bus is idle. The VME64 standard utilizes this
- unused bandwidth to enable 64 bit block transfers. The lower 32 bits
- are placed on the regular D0 to D31 and the upper 32 bits placed on the
- idle address bus A01 to A31.
-
- The VME64 standard adds many other advanced features. VME64 is a VITA
- Standard. This standard, which has recently gained ANSI approval, is
- backwards compatible with existing VMEbus boards.
- For more information: http://www.vita.com/jvita.html
-
- There is a VME64 Reflector (mailing list). To subscribe Email to
- majordomo@syspac.com leaving the subject line blank with the following
- command in the body of the message: subscribe vita
- You will receive a confirmation of your subscription and to address
- Email to others on the list send your message to vita@syspac.com
- ----------------------------------------------------------------------
-
- 3) The VXIbus - Technical Information
- ========================================
-
- A) The VXIbus - Introduction
- ------------------------------
- The VXIbus is an instrumentation bus based on the VMEbus, the Eurocard
- and standards such as IEEE 488.2 and the HP GPIB (General Purpose
- Instrumentation Bus). It is an open architecture and is useful for
- automated test systems and data collection. The issue of
- electromagnetic radiation is part of the VXIbus specification. VXIbus
- is an acronym for "VMEbus eXtensions for Instrumentation". The VXIbus
- was announced in 1987.
-
- The VXIbus expands on the VMEbus so the two bus specifications are very
- similar. TTL and ECL trigger lines, a local bus and an analogue summing
- bus are among the added features. The December 1988 issue of "VMEbus
- Systems" contains a good outline of the VXIbus. The Spring 1995 issue
- of "VXIjournal" is a VXIbus Buyer's Guide.
-
- B) The VXIbus - Description
- -----------------------------
-
- There are two more board sizes in addition to the VMEbus single and
- double sizes:
-
- Size Height Dimensions (mm) Connectors Slot Spacing
- ---- ------ --------------- ---------- ------------
- A Single 100 x 160 P1 0.8 inch
- B Double 233 x 160 P1 & opt P2 0.8 inch
- C Double 233 x 340 P1 & opt P2 1.2 inch
- D Triple 366 x 340 P1, opt P2,P3 1.2 inch
- ------------------------------------------------------------------------
- opt = optional
- P1, P2 & P3 are the same 96 pin DIN connector as in the VMEbus.
- The increased width of the C and D sizes are to accommodate thick
- analogue modules and EMI shielding.
-
- The VXIbus uses the same pin assignments on P1 and the centre P2 pins as
- the VMEbus. The two rows (A & C) on P2 that were user defined on the
- VMEbus are assigned on the VXIbus. Features added include ECL (emitter
- coupled logic) and TTL trigger signals, a 10 Mhz ECL clock, more supply
- sources (+-24, -2 and -5.2 volts), an analogue summing bus, local bus
- lines and a module identification line. The optional P3 available on
- the D size board offers the same type of resources as P2 but at a speed
- of 100 Mhz (P2 is only 10 Mhz).
-
- Reasons why the VMEbus and the VXIbus specifications are not totally
- compatible include:
-
- 1) conflicts may arise depending on the use of the A & C rows on P2.
- 2) VMEbus Double height boards are not as deep as VXIbus size C.
- 3) The VMEbus has no configuration registers while the VXIbus does.
-
- A VXIbus system can have up to 13 modules consisting of a central timing
- module in Slot 0 and a maximum of 12 additional instrumentation modules.
-
- C) DIN Connector Assignments
- ------------------------------
- P1 and P2-B (the centre row) have the same pin assignments as the VMEbus
- and are listed above. The outside 2 rows of P2 are specified in the
- VXIbus. In the VMEbus specification, these two rows are user defined.
- Since Slot 0 on the backplane is reserved for a system timing module,
- P2-A has slightly different assignments than for Slots 1 to 12. P2-C
- has essentially the same assignments for all slots.
-
- to be continued.....
-
- 4) Information Sources
- =========================
-
- A) VMEbus Systems Magazine
- ----------------------------
- 25875 Jefferson (Advertising and Business Offices)
- St. Clair Shores The Editorial Offices are at Micrology
- Michigan, 48081 listed below.
- (313) 774-8180
- (313) 774-8182 (FAX)
-
- This magazine is free to qualified VMEbus systems users and specifiers
- in the United States and Canada. There is a subscription fee applicable
- for other countries. This magazine contains industry news, informative
- articles and useful advertisements. Back issues are available from
- Micrology. For more information see http://www.primenet.com/~magpub.
- The December 1994 issue is a useful Buyer's Guide.
-
- B) VXI Journal
- ---------------
- Business Offices Editorial Offices
- ---------------- -----------------
- 25875 Jefferson 11051 Pinto Drive
- St. Clair Shores Fountain Hills
- Michigan, 48081 Arizona, 85268
- (313) 774-8180 (602) 837-3756
- (313) 774-8182 (FAX) (602) 837-3768 (FAX)
- Email address: vxijournal@aol.com
-
- Published by the people at the VMEbus Magazine at the same addresses.
- Subscriptions are free to qualified users of the VXIbus or GPIB in
- Canada or the USA.
-
- C) Real Time Engineering
- -------------------------
- A new magazine, Real Time Engineering, is also published by Micrology in
- Arizona. The Spring 1995 edition is a Buyer's Guide.
-
- To get a subscription request form for any of these magazines, send
- Email to John Black, Editor (micrology@aol.com) or contact the offices
- in Michigan.
-
- The World Wide Web (WWW) site for these three magazines is:
- http://www.primenet.com/~magpub.
-
- D) Micrology pbt, Inc.
- ------------------------
- 2618 S. Shannon Drive
- Tempe, Arizona 85282
- (602) 967-5581
- (602) 968-3446 (FAX)
- (602) 968-9265 (Real Time Engineering Magazine)
- micrology@aol.com John Black
-
- A VXIbus Buyer's Guide - $33
-
- Back issues of VMEbus Systems Magazine are available for $4 each.
- Email micrology@aol.com and request a listing.
-
- *** Micrology is having a sale on some back issues** (still??)
-
- The Systems Engineer's Handbook:
- A guide to building VMEbus and VXIbus systems:
-
- John Black has edited this hard cover text that covers the VMEbus and
- VXIbus thoroughly. This is an easy to read book that contains the
- complete VMEbus and VXIbus specifications and information on graphics,
- disk interfaces, Ethernet, image processing and interfacing to external
- devices such as stepping motors...and much more.
- ]It is now available direct from Micrology for US$59.95 + $7 shipping.
- Phone (602) 966-5936 FAX (602)-968-3446 Email - micrology@aol.com
-
- E) VITA - VMEbus International Trade Association
- --------------------------------------------------
-
- VITA VITA Europe
- 10229 North Scottsdale Rd P.O. Box 192
- Suite B 5300 AD Zaltbommel
- Scottsdale, Arizona 85253 The Netherlands
- (602) 951-8866 31.4180.14661 (or .16593)
- (602) 951-0720 (FAX) 31.4180.15115 (FAX)
-
- John Rynearson Zoltan Hunor
- Technical Director Director VITA
- VITA USA Europe
- techdir@vita.com hunor@knoware.nl
-
- World Wide Web site: http://www.vita.com
-
- VITA is the world-wide association of the VMEbus users and manufacturers
- and as such organizes global promotion of the VMEbus including
- exhibitions, seminars and courses. Vita does not test and approve
- components but is a full member of ANSI and promotes standards of
- interest to the community. VITA publishes various magazines and manuals
- about the VMEbus.
- In Europe, VITA has a mailing list of 100,000 engineers.
-
- VMEbus Handbook $53
- VMEbus Specification $32
-
- The Handbook provides information for programmers, system integrators,
- engineers while the VMEbus Specification provides more "hardware level"
- information such as that needed for board design. These two books
- provide the information needed to understand the VMEbus system and are
- worth the moderate cost.
-
- VITA also publishes a Buyer's Guide for $55 (or $110 a year).
-
- VITA now offers a quarterly news publication, the VITA Journal, on a
- complimentary subscription basis. It contains member and industry news
- and the activities of the VITA Standards Organization.
- ]
- F) Computer Design
- --------------------
- Computer Design is amagazine that contains VMEbus advertisements with
- articles about computer design in general. It is free to qualified
- readers by contacting Ron Kalusa at ronk@pennwell.com.
-
- ]
- G) Test & Measurement World
- -----------------------------
- This magazine will feature the VXIbus starting in January 1996. The
- February issue will feature an article on using VMEbus slave cards in a
- VXIbus system. It is free to qualified industry personnel.
-
- 275 Washington Street
- Newton, Massachusets 02158
- Phone (617) 558-4671
- Fax (617) 558-4470
- Email: tmw@cahners.com
-
- H) The Manufacturers
- ----------------------
- There are many manufacturers of VMEbus computer modules worldwide.
- Refer to any of the Buyer's Guides listed above or post to
- comp.arch.bus.vmebus for more information. Many manufacturers are
- getting Internet Email addresses. They note them in their
- advertisements in the magazines listed above.
-
- Many VMEbus CPU boards have a built-in monitor program similar to the
- TUTOR monitor and have a RS-232 port that can be hooked up to a terminal
- or a host computer. Programs can be entered with the provided simple
- assembler/disassembler and executed. Peripheral devices can be attached
- easily to these boards. These boards are often available used and the
- older ones with 68000/10 CPUs have a low cost(<$50) and this is a good
- way to become acquainted with the VMEbus. See the FAQ for comp.sys.m68k
- for more information.
-
- I) Unadvertised ftp and WWW Sites
- -----------------------------------
- Motorola http://www.motserv.indirect.com
- http://www.mot.com
- ftp://freeware.aus.sps.mot.com (Motorola BBS)
- http://freeware.aus.sps.mot.com/index.html (for html)
- ftp://pirs.aus.sps.mot.com (129.38.233.1) (AESOP & DR. BUB)
- http://design-net.com/datacom - info on MC68302 and 68360.
-
- There are many links between each of these sites.
- DR. BUB (DSP information) is not operational yet.
- ------------------------------------------------------------------
-
- VITA - http://www.vita.com
-
- Heurikon - http://www.heurikon.com
- (nifty daily cartoons)
- Dallas Semiconductor - http://www.dalsemi.com
- (Postscript data sheets)
- Maximum Strategy Inc. - http://www.maxstrat.com (disk arrays)
-
- ]Hitex Corporation - http://www.hitex.com/automation for California
- http://www.ba-karlsruhe.de/automation (Germany)
- In-circuit emulators and remote debuggers.
- Titan Electronics http://www.titan.com
-
- ]Introl Corporation: http://www.introl.com
-
- Introl is offering a non-commercial license for their US$2,000 C
- compiler. This is the full version - it is not crippled. It comes with
- an instruction manual. See their homepage for more information.
- This is now available in a Windows 95 version.
-
- FAQ - comp.sys.m68k: for information on the Motorola M680x0 and MC683xx
- --------------------
-
- ftp://nyquist.ee.ualberta.ca/pub/motorola/m68kfaq
- http://www.ba-karlsruhe.de/automation/FAQ/m68k Germany
- http://www.hitex.com/automation/FAQ/m68k California
- http://www.oritools.com/info (also 8051, HC11 and PowerPc FAQs)
-
- 5) Answers to Frequently Asked Questions
- ===========================================
-
- A frequently asked question is "are there any easy-to-use devices to
- provide a VMEbus interface to my computer design?". Two suppliers of
- chips to do these tasks are Cypress and Newbridge .
-
- A) Newbridge Microsystems
- ---------------------------
- The VME64 (SCV64) controller chip provides a 64 bit VMEbus interface
- from the local bus. This chip has a built-in DMA controller, VMEbus
- address decoder and local bus burst modes. It is a 299 pin PGA
- ($308CDN) or a 304 pin PQFP ($256CDN) package.
-
- Newbridge also make PCI to VMEbus interface ("UNIVERSE")($US160 @ 1K)
- and Futurebus+ interface chips ("LIFE"). A new part, "TROOPER" is a low
- cost ($40 1995 @ 1K) slave-only VMEbus interface chip. Available June
- 1995. The SCV64 and "TROOPER" are fabricated by Motorola.
-
- The "SPANNER" is now in production. This is a MC68040 to PCI bridge
- chip. This is Newbridge's introductory offering in this area.
-
- (800) 267-7231 (North America), (613) 592-0714 in Canada or
- (408) 258-3600 in California.
-
- Email addresses:
- nms-inquire@newbridge.com for general inquiries or
- nms-support@newbridge.com for technical support.
-
- <prices may be inaccurate> The SCV64 (33 Mhz QFP) has been reported as
- costing US$ 332 (qty=5), US$ 287 (25) and US$ 248 (100).
-
- ////////////////////////////////////////////////////////////////////////
- Cypress Semiconductor
- ----------------------
- Cypress manufactures a series of useful VMEbus integrated circuits:
-
- VIC64 - an enhanced VIC068. All the features of the VIC068 plus
- MBLT support. (Multiplexed Block Transfer) Provides a direct
- connection to the M68K family and mappable to others. VME64
- compliant (64 bit block transfers - rates up to 70
- mbytes/sec). 144TQFP, 144PPGA, 144CPGA, 160PQFP, 160CQFP.
- $US 142 (Qty 100)
-
- VIC068 - VMEbus Interface Controller - provides VMEbus controller
- functions between a CPU and the external VMEbus. VMEbus
- SYSCON (system controller), interrupt handler, local DMA and
- a DRAM controller. 32/16/8 bit transfers. 144TQFP, 144PPGA,
- 144CPGA, 160PQFP, 160CQFP. $US 113 (Qty 100)
-
- VAC068 - VMEbus Address Controller - forms a complete VMEbus
- master/slave interface when used with the VIC068.
- 144PPGA, 144CPGA, 160PQFP, 160CQFP. $US 91 (Qty 100)
-
- CY7C960 - Slave VMEbus Interface Controller - VME64 (64/32/16/8 bit
- data transfers), auto-slot ID, DMA, DRAM controller with
- refresh. 80 mbyte/sec Block Transfers. CR/CSR support (used
- for Auto-slot identification to determine which slot a
- participating module is in).
- 64TQFP, 64CQFP, 68CPGA. $US 29
-
- CY7C961 - based on the CY960 - includes local and remote VMEbus Master
- capability. on-chip DMA. 100 TQFP, 100CQFP. $US 47 (Qty 100)
-
- CY7C964 - Bus Interface Logic Circuit - a companion part to the
- products listed above. This 8 bit part is used to drive the
- upper three bytes of the VMEbus data and address buses. Three
- devices are needed for VIC068 and VIC64 and four with the
- CY7C960/961. The VIC64 and VIC068 directly drive the lower
- bytes. The purpose of this part is to simplify the
- interfacing of the board logic by providing various counters,
- latches, comparators and drivers.
- 64TQFP, 64CQFP, 68CPGA. $US 19 (Qty 100)
-
- San Jose, California, U.S.A Toronto, CANADA.
- Phone (408) 943-2600 Phone (416) 620-7276
- FAX (408) 943-2741 FAX (416) 620-7279
- vmebus@cypress.com Ed Dupuis (ead@cypress.com)
-
- BBS: (408) 943-2954 (1200 to 19.2k, 8N1)
- =====================================================================
-
- B) Battery Clocks - MK48TO2B-xx
- ---------------------------------
- Some VMEbus CPU boards contain a clock IC with an integral battery such
- as the MOSTEK MK48TO2B-25. The battery in this device is supposed to
- last for five years, then the entire chip must be replaced. It seems
- nobody expected these boards to become obsolete at 5 years.
-
- The MK48TO2B-25 is being discontinued and perhaps replaced by the
- M48TO2-200PC1. Mauser Electronics <(800) 346-6873 or (817)483-4422> nor
- Arrow have any MK48Ts and the M48Ts have a delivery time of 8 to 14
- weeks. MOSTEK is apparently now owned by SGS-Thompson who will be
- replacing the MK48TO2B with a 2 piece part called the "SnapHat". The IC
- proper and the battery/crystal are replaced separately. This
- information is provided by Gerry Belanger and Dennis Johnson.
-
- Dallas Semiconductor makes the Timekeeper series of clock chips. Their
- US phone number is (214) 450-0448 or (800) 336-6933.
- The Dallas DS1642 may be replaced the Mostek MK48TO2B-25<not confirmed>.
- The DS1642 is available in speeds of 120 or 150 nsec. It is available
- directly from Dallas Semiconductor for about US$17 plus shipping with a
- delivery time of 4 to 6 weeks. Dallas suggests that Newark Electronics
- may have this item in stock. (800) 463-9275 CANADA only.(?)
-
- How to add an external battery:
- --------------------------------
-
- The MK48TO2B-25 Mostek real time clock consists of a standard 24 pin DIP
- with a black plastic cap attached to its top. This plastic restangular
- cap contains the clock crystal and the battery.
-
- This cap is attached at each end only with some sort of potting material
- that seems to be an epoxy. If you put the MKT48 up to a light source
- you should be able to see a gap between the plastic cap and the DIP.
- Notice that the cap is glued to the DIP only at the ends and then only
- in the centre of the ends. ie where the half-circle is molded into a
- DIP to indicate where pins 1 and 24 are and at the corresponding place
- at the other end.
-
- The wires for the crystal and the battery pass through this potting
- material on each side of the potting material. The crystal wires are at
- the pin # 1 and 24 end of the DIP and the battery is at the pin # 12 and
- 13 end. These wires do not necessarily connect to these pins.
-
- The idea is to cut through the potting material, disconnect the positive
- internal battery wire and solder a new battery to the wire coming out of
- the DIP nearest to pin 13 and the other to pin 12 (ground) of the DIP.
-
- The positive (+) wire is towards pin 13 (but is not connected to it).
- Ground is pin 12 (the external pin on the DIP).
-
- I found a hacksaw blade the ideal tool to slowly cut through the potting
- material. From time to time I would probe in the cut spot with a
- voltmeter (gnd to pin 12) to see if I had reached the positive wire.
- Even though the battery is near death, mine measured 0.9 volts which is
- enough to detect. Then I continued cutting and scratching until the
- wire was exposed. The rest is easy. Cut the wire in two and solder the
- positive terminal of the new battery to the lower wire (ie the one that
- comes out of the DIP). The wire is not microscopic and relatively easy
- to work with once exposed.
-
- A picture would be worth a million words, nay, a -billion- at this
- point. Once you have done one, it would be easy to do many. I used a
- small 3 volt clock battery that had two tabs spot welded on it.
- Works great for me! Good Luck!
-
- Please send suggestions for this article to r.boys@genie.geis.com
- The original idea for this was provided by Michael Coughlin at MIT.
-
- C) Where does the name "VME" come from?
- -----------------------------------------
- In case you are new to this newsgroup...
- an article written by John Black:
-
- What meaneth VME?
- -------------------
- In 1981, when Motorola agreed to allow Mostek and Signetics to second
- source the MC68000 microprocessor chip, the three companies agreed to
- meet and discuss the possibility of supporting a common backplane bus.
- At that time Motorola had already developed a 68000-based backplane bus,
- which they called VERSAbus. Since I had written a large portion of the
- VERSAbus specification, I was the Motorola technical representative at
- that meeting.
-
- Motorola proposed that the three companies jointly support the VERSAbus
- backplane. However, both Mostek and Signetics rejected that proposal,
- saying that the VERSAbus board size was much too large. In response to
- that objection, Motorola proposed that the (much smaller) Eurocard board
- size be used. A backplane could then be designed with the VERSAbus
- electrical specifications and the Eurocard mechanical specifications.
- Motorola suggested that new board products (based on this new backplane)
- be called VERSAmodule Eurocards, which could be abbreviated "VME".
-
- Both Mostek and Signetics were satisfied with the choice of the Eurocard
- mechanical standard, but they objected to the "VERSAmodule Eurocard"
- name, since Motorola had already trademarked the name "VERSAmodule".
-
- Eventually this difficulty was overcome when the three companies agreed
- that the name VMEbus would be placed in the public domain, and that if
- anybody asked what VME meant; they would say....
-
- "VME?...Oh, it doesn't stand for anything in particular".
-
- Now you know the awful truth.
-
- by:
- John Black
- Editor
- VMEbus Systems Magazine
- Tempe, Arizona
- micrology@aol.com
-
- (reprinted here with John's permission)
-
- ////////////////////////////////////////////////////////////////////////
- ////////////////////////////////////////////////////////////////////////
-
- 6) PROFILES:
- ===============
- The purpose of this section is to profile some of the products of
- various manufacturers to give an idea of what is available to the
- designer and the state of the market. This section will be rotated and
- previous sections will be archived.
-
- Next month (hopefully) will be Pivotal Graphics.
-
- //////////////////////////////////////////////////////////////////////
- //////////////////////////////////////////////////////////////////////
-
- Most Friendly Contributors:
-
- Andy Fraser Ontario
- John Black Arizona
- Michael Coughlin Massachusets (sold me my first VME board!)
- Gerry Belanger Connecticut
- Bosco Chan Ontario
- Michael Bodine Ilinois
-
- ////////////////////////////////////////////////////////////////////////
-
- and more to come.....
-
- Please send all comments to:
-
- Robert Boys
- HiTOOLS Inc
- 2055 Gateway Place
- San Jose, California, 95110
-
- r.boys@genie.geis.com or rboys@best.com
-
- Thank you
-
-