ÆROM: GARYF@WIIS.WANG.COM (ÇARY ÆIELD) ÓUBJECT: COMP.PERIPHS.SCSI ÆÁÑ PART 1 OF 2 ÅXPIRES: ÆRI, 1 ÊUL 1994 05:00:03 ÇÍÔ ÒEPLY-ÔO: GARYF@WIIS.WANG.COM (ÇARY ÆIELD) ÏRGANIZATION: ×ANG ÌABS, ÌOWELL ÍÁ, ÕÓÁ ÄATE: ÔHU, 2 ÊUN 1994 13:24:50 ÇÍÔ ÁPPROVED: NEWS-ANSWERS-REQUEST@ÍÉÔ.ÅDU ÍESSAGE-ÉÄ: <ÃQRUÌÇ.ÍW5@WANG.COM> ÆOLLOWUP-ÔO: COMP.PERIPHS.SCSI ÓUMMARY: ÔHIS POSTING CONTAINS A LIST OF ÆREQUENTLY ÁSKED ÑUESTIONS (AND THEIR ANSWERS) ABOUT ÓÃÓÉ. ÉT SHOULD BE READ BY ANYONE WHO WISHES TO POST TO THE COMP.PERIPHS.SCSI NEWSGROUP. ÓENDER: NEWS@WANG.COM ÎNTP-ÐOSTING-ÈOST: GFIELD.WIIS.WANG.COM ÌINES: 940 ØREF: MMDDVAN COMP.PERIPHS.SCSI:23542 COMP.ANSWERS:5632 NEWS.ANSWERS:23175 ÁRCHIVE-NAME: SCSI-FAQ/PART1 ÓÃÓÉ ÆÁÑ: ÆREQUENTLY ÁSKED ÑUESTIONS FOR COMP.PERIPHS.SCSI ÆÁÑ HISTORY: ÃREATED BY ÊOHNATHAN ÖAIL (VAIL@TEGRA.COM) FROM ARTICLES SUBMITTED TO HIM BY COMP.PERIPH.SCSI READERS. ÍAINTAINED BY ÊOHNATHAN ÖAIL UNTIL ÎOVEMBER 1993. ÃURRENT ÅDITOR: ÇARY ÆIELD (GARYF@WIIS.WANG.COM) ÌAST ÍODIFIED: ÍAY 27, 1994 ÍASTER ÔABLE OF CONTENTS: ÐART 1 ×HAT IS ÓÃÓÉ ? ÉS IT POSSIBLE FOR TWO COMPUTERS TO ACCESS THE SAME ÓÃÓÉ DISKS? ×HAT IS THE PROBLEM WITH THE ÁDAPTEC 1542à AND EXTERNAL CABLES? ×HERE CAN É GET ÓÃÓÉÃÎÔÌ.ÅØÅ AND OTHER ÁDAPTEC FILES? ×HAT IS THE DIFFERENCE BETWEEN THE ÁDAPTEC 1542Á AND 1542Â? ×HAT ARE THE DIFFERENCES BETWEEN THE ÁDAPTEC 1542 AND THE 1542Ã? ×HAT ARE THE DIFFERENCES BETWEEN THE 1542à AND THE 1542ÃÆ? ×HAT KINDS OF ÏPTICAL ÄRIVES ARE AVAILABLE? ×HERE CAN É GET ÆÔÐ/DOWNLOAD ÓÃÓÉ DOCUMENTS? ×HERE CAN É GET ÓÃÓÉ DOCUMENTS? ×HERE CAN É GET INFORMATION ON VARIOUS DISK DRIVES AND CONTROLLERS? ×HAT IS THE TELEPHONE NUMBER OF ÁDAPTEC? ×HAT IS THE TELEPHONE NUMBER OF ÁRCHIVE ÃORPORATION? ×HAT IS THE TELEPHONE NUMBER OF ÆUJITSU? ×HAT IS THE ADDRESS AND TELEPHONE NUMBER FOR ÑUANTUM? ×HAT IS THE TELEPHONE NUMBER FOR ÓEAGATE? ×HAT IS THE TELEPHONE NUMBER AND ADDRESS OF ÃONNER ÐERIPHERALS? ×HAT IS THE NUMBER FOR ÎÃÒ? ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ÕLTRAÓTOR? ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ×ANGTEK? ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ×ESTERN ÄIGITAL? ×HAT IS ÆÁÓÔ ÓÃÓÉ? ÓÃÓÉ TERMINATORS SHOULD MEASURE 136 OHMS? ÃAN SOMEONE EXPLAIN THE DIFFERENCE BETWEEN 'NORMAL' AND DIFFERENTIAL SCSI? ×HAT ARE THE PINOUTS FOR DIFFERENTIAL ÓÃÓÉ? ×HAT ARE THE PINOUTS FOR ÓÃÓÉ CONNECTORS? ÐART 2 ×HAT IS THE DIFFERENCE BETWEEN ÓÃÓÉ-1 AND ÓÃÓÉ-2? ÉS ÓÙÎÃÈÒÏÎÏÕÓ FASTER THAN ÁÓÙÎÃÈÒÏÎÏÕÓ? ÉS THE 53Ã90 ÆASTER THAN SPEC? ×HAT ARE THE JUMPERS ON MY ÃONNER DRIVE? ×HAT ARE THE JUMPERS FOR MY ×ANGTEK 5150 DRIVE? ×HAT IS ÃÁÍ? ×HAT IS ÆÐÔ (ÔERMINATION)? ×HAT IS ÁCTIVE ÔERMINATION? ×HY ÉS ÁCTIVE ÔERMINATION ÂETTER? ×HY IS ÓÃÓÉ MORE EXPENSIVE THAN ÉÄÅ? ×HAT IS ÐLUG AND ÐLAY ÓÃÓÉ? ×HERE CAN É GET DRIVERS (ÁÓÐÉ AND OTHER) FOR THE ×Ä7000 ÆÁÓÓÔ2 HOST ADAPTER? ×HAT IF É HAVE A DRIVE LARGER THAN A GIGABYTE (1024K) ? ==== ÑÕÅÓÔÉÏÎ: ×HAT IS ÓÃÓÉ? ÁÎÓ×ÅÒ ÆROM: ÌÓÄ, Ì.Ê.ÓAK@ËUB. ÅDITED BY ÇARY ÆIELD ==== ÓÃÓÉ STANDS FOR ÓMALL ÃOMPUTER ÓYSTEMS ÉNTERFACE. ÉT'S A STANDARD FOR CONNECTING PERIPHERALS TO YOUR COMPUTER VIA A STANDARD HARDWARE INTERFACE, WHICH USES STANDARD ÓÃÓÉ COMMANDS. ÔHE ÓÃÓÉ STANDARD CAN BE DIVIDED INTO ÓÃÓÉ (ÓÃÓÉ1) AND ÓÃÓÉ2 (ÓÃÓÉ WIDE AND ÓÃÓÉ WIDE AND FAST). ÓÃÓÉ2 IS THE MOST RECENT VERSION OF THE ÓÃÓÉ COMMAND SPECIFICATION AND ALLOWS FOR SCANNERS, HARD DISK DRIVES, ÃÄ-ÒÏÍ PLAYERS, TAPES [AND MANY OTHER DEVICES] TO CONNECT. ÓÃÓÉ IS BECOMING A POPULAR STANDARD. ÍORE AND MORE COMPUTERS USE IT DAILY. (E.G. ÁÔÁÒÉ ÆALCON AND ÔÔ, EXPENSIVE ÍÓ-ÐÃ'S, ÁMIGA, ÁPPLES AND MANY OTHERS) ==== ÑÕÅÓÔÉÏÎ: ÉS IT POSSIBLE FOR TWO COMPUTERS TO ACCESS THE SAME ÓÃÓÉ DISKS? ÁÎÓ×ÅÒ ÆROM: BURKE@SEACHG.UUCP (ÍICHAEL ÂURKE) ==== ÙES, TWO (OR MORE) SYSTEMS CAN BE ON THE SAME SCSI BUS AS SCSI DISK AND TAPE DRIVES. ÁS LONG AS THE SCSI REQUIREMENTS ARE MET - CABLE LENGTHS, TERMINATION AND TYPE - THE DEVICES CAN SHARE THE SCSI BUS. ÔHE QUESTION SHOULD BE - ÁRE THERE ANY Ï/Ó' THAT WILL ALLOW THE SHARING OF FILE SYSTEMS? ÉT WOULD NOT MAKE SENSE FOR TWO HOSTS TO GO ABOUT TREATING SHARED DISKS AS IF THEY OWNED THE DEVICE. ÄATA WOULD BE DESTROYED PRETTY QUICKLY. ÏN THE ISSUE OF TAPE DEVICES, HOWEVER, Ï/Ó' TEND TO GIVE EXCLUSIVE USAGE TO AN APPLICATION. ÉN THIS WAY, TAPE DRIVES CAN BE SHARED MUCH MORE EASILY. ÄISKS CAN BE BEST SHARED BY HAVING TWO (OR MORE) PARTITIONS ON A DISK. ÅACH HOST "OWNING" ITS OWN FILE SYSTEM. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE PROBLEM WITH THE ÁDAPTEC 1542à AND EXTERNAL CABLES? ÁÎÓ×ÅÒ ÆROM: ÓCOT ÓTELTER, ÁDAPTEC (ÐRODUCT ÍANAGER FOR THE ÁÈÁ-1540) ==== ÓEVERAL ARTICLES LATELY HAVE CITED THE IMPORTANCE OF ÓÃÓÉ-2-COMPLIANT CABLES WHEN CABLING ÓÃÓÉ BUS SUBSYSTEMS. ÐERHAPS THE MOST ACCURATE AND TECHNICALLY DETAILED ONE WAS PUBLISHED IN ÃOMPUTER ÔECHNOLOGY ÒEVIEW IN ÍARCH (ÖOLUME ØÉÉÉ, ÎO. 3. ÐÐ. 6). ÉN SHORT, IT EXPLAINS THE DOUBLE-CLOCKING MECHANISM THAT CAN OCCUR DUE TO CABLES WHOSE IMPEDANCE FALLS BELOW THE 90-ÏHM ÓÃÓÉ-2 SPEC. ÓTEEP EDGE SPEEDS ON THE ÒÅÑ AND ÁÃË LINES OF THE ÓÃÓÉ BUS EXACERBATE THE PROBLEM, BUT NON-COMPLIANT CABLES ARE THE ROOT CAUSE. ÂOTH ÌÁÎ ÔÉÍÅÓ IN THE ÕÓ (5/24/93, PAGE 115) AND ÃÔ ÍAGAZINE IN ÇERMANY (7/93, PAGE 18) CITE THIS CABLE PROBLEM. ÉN AN EXTENSIVE SURVEY OF CABLES AVAILABLE IN THE ÕÓ AND ÅUROPE, WE FOUND THAT MORE THAN HALF OF THE CABLES AVAILABLE HAVE SINGLE-ENDED IMPEDANCES IN THE 65 TO 80 ÏHM RANGE -- BELOW THE 90 TO 132 ÏHMS SPECIFIED IN THE ÓÃÓÉ-2 SPEC. ÉT SEEMS THAT SOME (NOT ALL) CABLE VENDORS DO NOT UNDERSTAND THE SPECIFICATION, DESCRIBING THEIR CABLES AS ÓÃÓÉ-2 COMPLIANT WHEN THEY ARE NOT. Á COMMON MISCONCEPTION IS THAT ÓÃÓÉ-2 MEANS A HIGH-DENSITY CONNECTOR. ÉN FACT, THERE ARE SEVERAL CONNECTOR OPTIONS. É HAVE PUBLISHED A TECHNICAL BULLETIN THAT SUMMARIZES THE CRITICAL REQUIREMENTS (Ô 001, ÁPRIL 1993). ÁN ARTIFACT OF ITS FASTER DESIGN LEFT THE ÁÈÁ-1540à WITH FASTER EDGE-SPEEDS THAN ITS PREDECESSOR, THE ÁÈÁ-1540Â. ÁS É HAVE SAID, THIS CAN EXACERBATE THE EFFECT OF BAD CABLES. ÔHIS EXPLAINS WHY SOME USERS COULD GET THEIR ÁÈÁ-1540 TO WORK WHEN AN EARLY ÁÈÁ-1540à MIGHT NOT. ÅSSENTIALLY, THE 1540 WAS MORE FORGIVING THAN THE EARLY 1540ÃS. ÇOOD CABLES FIXED THE PROBLEM, BUT UNFORTUNATELY FOR THE USER, GOOD CABLES ARE HARD TO FIND. ÁFTER SURVEYING THE CABLE MARKET AND MANY OF OUR CUSTOMERS, WE DECIDED THAT BAD CABLES WERE GOING TO BE HERE FOR A WHILE, AND WE HAD TO MAKE THE 1540à AS FORGIVING AS THE 1540 WAS. ÁT THE END OF ÁPRIL WE MADE A CHANGE TO THE ÁÈÁ-1540à THAT INVOLVED USING A PASSIVE FILTER TO REDUCE THE SLEW RATE OF THE ÁÃË LINE, THE SIGNAL THAT THE HOST ADAPTER DRIVES DURING NORMAL DATA TRANSFERS. ÅXTENSIVE TESTING WITH MANY INTENTIONALLY ILLEGAL CONFIGURATIONS CONFIRMS THAT WE SUCCEEDED. ÐRIOR TO RELEASE, WE TESTED THE ÁÈÁ-1540à WITH OVER 200 PERIPHERALS, SYSTEMS AND DEMANDING SOFTWARE PROGRAMS WITH NO FAILURES. ÔHEN, A SECOND TEAM RETESTED THE ÁÈÁ-1540à ACROSS A WILD COMBINATION OF TEMPERATURES, HUMIDITIES AND OTHER STRESSES. ÔHIS TESTING GIVES ME CONFIDENCE THAT THE ÁÈÁ-1540 LINE CONTINUES TO SERVE AS THE GOLD STANDARD FOR ÓÃÓÉ COMPATIBILITY. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE DIFFERENCE BETWEEN THE ÁDAPTEC 1542Á AND 1542Â? ÁÎÓ×ÅÒ ÆROM: FISHMAN@PANIX.COM (ÈARVEY ÆISHMAN) ==== ÔHE ÁÈÁ-1542Á IS OBSOLETE AND NO LONGER SUPPORTED BY ÁDAPTEC. ÔHEY STOPPED PROVIDING FIRMWARE UPGRADES AT SOME LEVEL PRIOR TO THE EQUIVALENCE TO THE 3.10 LEVEL OF THE ÁÈÁ-1542 FIRMWARE. É AM NOT SURE JUST WHERE THOUGH. ÔHE PRESENT LATEST ÁÈÁ-1542 FIRMWARE IS VERSION 3.20, AND SUPPORTS DRIVES UP TO 8Ç UNDER ÍÓ-ÄÏÓ. ==== ÑÕÅÓÔÉÏÎ: ×HAT ARE THE DIFFERENCES BETWEEN THE ÁDAPTEC 1542 AND THE 1542Ã? ÁÎÓ×ÅÒ FROM: ÔERRY ËENNEDY (TERRY@SPCVXA.SPC.EDU) ==== ÔHE 1542à IS AN AN UPDATED MODEL WHICH REPLACES THE 1542Â. ÔHE 1542à FEATURES JUMPERLESS SETUP, HAVING ONLY 8 ÄÉÐ SWITCHES. ÁLL OTHER CONFIGURATION OPTIONS ARE SET USING THE 1542Ã'S BUILT-IN ÂÉÏÓ CONFIGURATION UTILITY. ÃONFIGURABLE FEATURES NOT FOUND ON THE 1542 ARE: O ÁBILITY TO ENABLE/DISABLE SYNC NEGOTIATION ON A PER-ÉÄ BASIS (THE 1542 COULD ONLY DO IT FOR ALL ÉÄ'S ON THE ÓÃÓÉ BUS) O ÁBILITY TO SEND "START UNIT" COMMANDS ON A PER-ÉÄ BASIS O ÂÉÏÓ WORKS WITH ALTERNATE É/Ï PORT SETTINGS ON THE ADAPTER O ÁBILITY TO BOOT FROM ÉÄ'S OTHER THAN 0 O ÓOFTWARE-SELECTABLE TERMINATION O ÓOFTWARE-SELECTABLE GEOMETRY TRANSLATION O ÁDDITIONAL ÄÍÁ SPEEDS OF 3.3 AND 10 ÍÂ/SEC ÁDDITIONALLY, THE 1542à USES A Ú80 ÃÐÕ AND 8ËB BUFFER INSTEAD OF AN 8085 AND 2ËB BUFFER AS ON THE 1542Â. ==== ÑÕÅÓÔÉÏÎ: ×HAT ARE THE DIFFERENCES BETWEEN THE 1542à AND THE 1542ÃÆ? ÁÎÓ×ÅÒ FROM: ÔERRY ËENNEDY (TERRY@SPCVXA.SPC.EDU) ==== ÔHE 1542ÃÆ INCLUDES ALL OF THE 1542à FEATURES, AND ADDS "ÆAST" ÓÃÓÉ OPERATION, PROVIDING ÓÃÓÉ DATA RATES OF UP TO 10ÍÂ/SEC (COMPARED WITH AN UPPER LIMIT OF 5ÍÂ/SEC ON THE 1542Ã). ÔHIS IS UNRELATED TO THE HOST ÄÍÁ RATE. ÉT ALSO HAS A SOFTWARE-CONFIGURABLE ADDRESS FOR THE FLOPPY CONTROLLER AND A "SELF-HEALING" FUSE FOR TERMINATION POWER. ==== ÑÕÅÓÔÉÏÎ: ×HERE CAN É GET ÓÃÓÉÃÎÔÌ.ÅØÅ AND OTHER ÁDAPTEC FILES? ÁÎÓ×ÅÒ ÆROM: RANDY@PSG.COM (ÒANDY ÂUSH) AND ÔIMOTHY ÈU TIMHU@ICO.ISC.COM ==== ÎEW FILES FROM ÒOY AS FOLLOWS: FTP.PSG.COM:Þ/PUB/ADAPTEC/... -RW-RW-R-- 1 RANDY STAFF 110689 ÆEB 25 00:29 ÓÃÓÉÃÎÔÌ.ÅØÅ.Ú -RW-RW-R-- 1 RANDY STAFF 368640 ÆEB 25 00:27 ADSE.DD -RW-RW-R-- 1 RANDY STAFF 1959 ÆEB 25 00:25 ADSE.DD.README -RW-RW-R-- 1 RANDY STAFF 17896 ÆEB 25 00:37 LIST -RW-RW-R-- 1 RANDY STAFF 99545 ÆEB 25 00:20 OS2DRV.ZIP -RW-RW-R-- 1 RANDY STAFF 70801 ÆEB 25 00:20 SCSI DRV.Ú -RW-RW-R-- 1 RANDY STAFF 66508 ÆEB 25 00:24 SCSI DRV.READM -RW-RW-R-- 1 RANDY STAFF 118697 ÆEB 25 00:17 UPDATE.PKG.Ú ÙOU CAN GET THE ÁÓÐÉ SPECS FROM ÁDAPTEC'S ÂULLETIN ÂOARD (408)945-7727. ==== ÑÕÅÓÔÉÏÎ: ×HAT KINDS OF ÏPTICAL ÄRIVES ARE AVAILABLE? ÁÎÓ×ÅÒ ÆROM: JOUNGWOO@MENSA.USC.EDU (ÊOHN ËIM) ==== ÁS É PROMISED É AM POSTING THE SUMMARY OF WHAT É LEARNED ABOUT 128MB OPTICAL DRIVES THROUGH MANY KIND REPLIES AND SOME EFFORT ON MY PART. ÔHE PURPOSE OF THIS INFORMAL SURVEY WAS TO AID PEOPLE (STARTING FROM MYSELF) IN DECIDING ON WHICH 128MB OPTICAL DRIVE TO BUY. ×HEN É POSTED MY QUESTIONS, IT WAS DONE ONLY ON COMP.MAC.SYS.HARDWARE AND FORGOT TO DO THE SAME ALSO ON COMP.ARCH.STORAGE AND COMP.PERIPHS.SCSI WHERE ARE LESS TRAFFIC THAN C.M.S.H. ÈOWEVER, AS A ÍACINTOSH OWNER MYSELF, THIS SURVEY WAS BIASED TOWARD THE ÍAC WORLD AND THE MAIL ORDER HOUSES MENTIONED SPECIALIZES IN ÍAC-RELATED PRODUCTS, ALTHOUGH THE BELOW MENTIONED OPTICAL DRIVES MIGHT BE USABLE ALSO WITH NON-ÍAC PLATFORMS (ÓUN, ÎEØÔ, ÐÃ-COMPATIBLES). ÍY QUESTIONS WERE: O WHAT KIND OF DRIVE YOU BOUGHT FROM WHOM AT WHAT PRICE O WHAT DRIVE MECHANISM (ÍÏÓÔ, ÅPSON, ÆUJITSU, ÓONY, ...) IT USES O HOW FAST IT IS IN TERMS OF AVERAGE SEEK TIME & DATA TRANSFER RATE O HOW NOISY THE DRIVE IS O HOW LARGE AND HEAVY THE DRIVE IS O WHAT DRIVE FORMATTING PROGRAM (EG, Æ× OR ÓILVER ÌINING) YOU USE WHAT ITS GOODS/BADS O THE QUALITY OF THE SERVICE OF THE SELLER (MAIL ORDER COMPANY, RETAIL STORE, ETC.) ÓUMMARY ÉN GENERAL, THESE DAYS, SOME MAGNETO-OPTICAL (ÍÏ) DRIVES SEEM TO BE ALMOST AS FAST AS (IF NOT FASTER THAN) ORDINARY HARD DRIVES (ÈÄ). ÔHE ACCESS TIME OF FASTEST 128Í ÍÏ DRIVES (AROUND 30MS) ARE SLOWER THAN AVERAGE ÈÄ'S ACCESS TIME (15MS) BUT THE TRANSFER RATE SEEMS TO BE ABOUT THE SAME (764ËÂYTES/SEC) OR NOT MUCH SLOWER. ÔHE ADVANTAGES OF THE ÍÏ DRIVES OVER THE ÈÄS ARE THAT YOUR STORAGE SPACE IS ALMOST LIMITLESS, EXPANDABLE AT A RELATIVELY CHEAP PRICE ($40/120Í = 34 CENTS/ÍÂ) COMPARED TO $1/Í RATE OF ÈÄS OR THAT OF ÓYÑUEST DRIVES, AND THE LIFE OF THE MEDIA IS VERY LONG (THEY SAY IT'S 30 YEARS OR REWRITABLE 100,000 TIMES.) ÆIJITSU 128 ÒÅÍ ÐORTABLE: ÁT THIS MOMENT, TO MY KNOWLEDGE, 128 ÍÂYTE OPTICAL DRIVES BASED ON ÆUJITSU MECHANISM SEEMS TO BE THE FASTEST, ROUGHLY HAVING AVERAGE SEEK TIME OF 30MS AND AVERAGE TRANSFER RATE OF 768ËÂYTES/SEC. ÁNOTHER GOOD THING ABOUT THIS ÆUJITSU DRIVE IS THAT IT IS MORE COMPACT IN SIZE THAN PREVIOUS 128MB OPTICAL DRIVES, IE, "PORTABLE". É DON'T KNOW HOW ÆUJITSU MECHANISM (ÆÍ) IS DIFFERENT FROM ÅPSON MECHANISM (ÅÍ) AND HOW ÆÍ PROVIDES A SIMILAR PERFORMANCE AT A CHEAPER PRICE IN A SMALLER FRAME. ÍAYBE USING SPLIT-HEAD IMPLEMENTATION TO MAKE THE READ-WRITE HEAD LIGHTER? ÃOULD ANYBODY POST INFO ON THIS? ÏNE PERSON TELLS ME THAT THE EJECT MECHANISM IS TOO STRONG, SOMETIMES SHOOTING THE CARTRIDGE OUT MAKING THEM LAND ON THE FLOOR. ÈE SAYS ÆUJITSU TOLD HIM THAT THE ÆÍ'S COMING OUT IN ÁPRIL WILL HAVE GENTLER EJECT. ÅPSON: ÔHE NEXT FASTEST (OR MAYBE JUST ABOUT THE SAME SPEED) ARE ÅPSON MECHANISM (ÅÍ) DRIVES, HAVING AVERAGE ACCESS TIME OF 34MS AND TRANSFER RATE OF 768ËÂ/SEC. ÔHESE ACHIEVE FASTER SPEED COMPARED TO OTHER OLD MECHANISMS BY HAVING A HIGHER RPM (3600RPM VS. PAST 2400 RPM). ÓLOWER ONES: ÏTHER MECHANISMS (ÓONY, ÐANASONIC, ETC.) SEEM TO HAVE BEEN DOMINATING THE OPTICAL DRIVE MARKET BEFORE ÆÍ AND ÅÍ'S ADVENT. ÔHESE HAVE A TYPICAL ACCESS RATE OF Þ45MS. É DON'T KNOW IF NOW THERE ARE NEW IMPLEMENTATIONS THAT MAKE THEM PERFORM BETTER THEN ÆÍ AND ÅÍ. ÍAYBE SOMEONE CAN TELL US. ÎOISE ÌEVEL: ÏNE THING TO CONSIDER MIGHT BE NOISE OF THE DRIVE. ÄIFFERENT MECHANISMS MAY HAVE TYPICAL NOISE LEVEL, BUT ONE THING SURE IS THAT DIFFERENT RESELLERS/COMPANYS' DRIVE'S NOISE LEVEL DIFFERS EVEN FOR THE SAME DRIVE MECHANISM, EG, ÓONY. ÉT LOOKS LIKE DIFFERENT CASING PRODUCES DIFFERENT NOISE LEVELS? (ÃOULD SOMEONE CONFIRM/DISCONFIRM THIS ASPECT?) ÂASE ON THE REPORT IN ÎOV '92 ISSUE OF ÍAC×ORLD, THE NOISE LEVEL OF ÍACÄIRECT, ÍACÐRODUCT AND ÄÇÒ 128MB ÍÏ DRIVES SEEM TO BE ÏË OR QUITE QUIET. ÔHIS ISSUE OF ÍAC×ORLD DEALS WITH REMOVABLE MEDIA DRIVES (OPTICAL DRIVES OF VARIOUS CAPACITY, ÓYÑUEST, ÂERNOULLI AND ÆLOPTICALS) AND YOU CAN GET SOME IDEA ON WHAT THE DIFFERENCES AMONG DIFFERENT DRIVE MECHANISMS ARE. ÆORMATTING ÓOFTWARE: ÁNOTHER THING TO CONSIDER IS WHAT KIND OF MEDIA FORMATTING SOFTWARE YOU WILL USE. ÁLL COMPANYS (OR MAIL ORDER PLACES) SEEMED TO PROVIDE FOR FREE FORMATTING PROGRAM WITH THEIR DRIVES. É DON'T HAVE THE DETAILS ON THIS. ÂUT AN INEFFICIENT FORMATTING CAN RESULT IN SLOW DRIVE PERFORMANCE. ÔHE MOST POPULAR ONE USED TO BE Æ×Â'S ÈARD ÄISK ÔOOLKIT BUT ÁNUBIS (ADVERTISED TO IMPROVE PERFORMANCE UP TO 35% [COMPARED TO WHAT?]) IS BEGINNING TO BE USED ALSO. É DON'T KNOW IF ALL FORMATTING PROGRAM AND THE DRIVE HARDWARE ALLOWS TO HAVE READ AND WRITE VERIFY OFF BUT BY HAVING THESE TURNED OFF YOU CAN OBTAIN SIGNIFICANT SPEED BOOST AT THE RISK OF LESS SECURE DATA TRANSFER. ÍAC×ORLD'S REPORT WARNED THAT DRIVES FROM SOME COMPANYS DON'T LET YOU TURN ON/OFF THE VERIFY. ÉN THE WORST CASE, SOME COME WITH VERIFY OFF AND NO OPTION TO TOGGLE IT BACK TO ÏÎ. 256MB ÍÏ DRIVES: ÉN GENERAL THESE HAVE BETTER TRANSFER RATE (1.23ÍÂ/SEC) AND A LITTLE SLOWER ACCESS TIME (35MS). É FEEL THAT THIS CAPACITY WILL SOON BE THE NEXT STANDARD. ÔHESE DRIVES ARE ABLE TO ALSO READ/WRITE 128MB CARTRIDGES AND 256MB WILL SOON BE NEW ÁÎÓÉ AND ÉÓÏ STANDARD. É ONCE HEARD FROM A SALEPERSON AT A MAIL ORDER PLACE THAT THESE ARE NOT RELIABLE YET AND HE SAW MANY THEY SOLD CAME BACK WITH COMPLAINTS. ÔHIS MAY BE A NON-GENERAL INSTANCE ON A TYPICAL DRIVE MECHANISM (SEEMS TO BE ÍÏÓÔ MECHANISM). ÐERSONALLY, É FEEL 128MB IS ACCOMODATING ENOUGH FOR PERSONAL USAGE AT HOME UNLESS YOU ARE DEALING WITH VERY LARGE DATA FILES (EG, LARGE GRAPHIC IMAGES). ==== ÑÕÅÓÔÉÏÎ: ×HERE CAN É GET ÆÔÐ/DOWNLOAD ÓÃÓÉ DOCUMENTS? ÁÎÓ×ÅÒ ÆROM: NEWS@MGSE.ÕÕÃÐ (ÎEWS ÁDMINISTATOR) ==== ÌAST ÃHANGED: ÔHU ÓEP 24 23:31:09 ÃÄÔ 1992 (ÎEW ÂÂÓ ÐHONE NUMBER) ÔHIS IS A PERIODIC POSTING OF INFORMATION ABOUT SOME OF THE ARCHIVES AT FTP.CS.TULANE.EDU AND THE AVAILABLE FILES FROM THE ÓÃÓÉ-ÂÂÓ, INCLUDING ÓÃÓÉ, ÅÓÄÉ, ÉÐÉ, AND ÆIBER ÃHANNEL DOCUMENTS FROM THE STANDARDS COMMITTEES. ÔHESE FILES ARE AVAILABLE FOR ÆÔÐ FROM FTP.CS.TULANE.EDU IN THE DIRECTORY PUB/SCSI. ÆILES ARE STORED IN FILE AREAS AS THEY ARE FOUND IN THE ÂÂÓ WITH EACH AREA HAVING A FILE NAMED 'FILES.BBS' THAT TELLS WHAT EACH FILE IS. ÔHE FILE PUB/SCSI/INDEX.Ú LIST EACH FILE AREA, ITS DESCRIPTIONS AND ITS FILES. ÔHANKS TO ÊOHN ÌOHMEYER OF ÎÃÒ, A MAJORITY OF THE ÓÃÓÉ RELATED FILES FROM THE ÓÃÓÉ ÂÂÓ ARE NOW AVAILABLE FOR ANONYMOUS FTP. ÔHESE FILES WERE SENT TO ME BY ÍR. ÌOHMEYER AT HIS EXPENSE SO THAT MORE PEOPLE WOULD HAVE ACCESS TO THEM. ÔHE ÓÃÓÉ ÂÂÓ (719-574-0424) CONTAINS A LARGE AMOUNT OF DATA RELATING TO ÓÃÓÉ, AND ÅÓÄÉ AS WELL AS ÓÃÓÉ-2, ÉÐÉ, AND ÆIBER ÃHANNEL, AS WELL AS THE LAST REVISION OF THE ÓÃÓÉ-1 STANDARD BEFORE IT WENT TO PUBLICATION BY ÁÎÓÉ. ÍOST OF THE FILES IN THE ÓÃÓÉ ARCHIVE ARE EITHER ARCHIVED WITH THE ÚÉÐ UTILITY OR COMPRESSED WITH THE 'COMPRESS' PROGRAM. ÍOST OF THE TEXT FILES ARE STORED AS ×ORDSTAR WORD PROCESSING FILES. ÐËZIP FOR ÐÃ/ÍÓ-ÄÏÓ IS INCLUDED IN THE ARCHIVE TO ALLOW USERS TO BREAK UP THE .ÚÉÐ FILES, AND THE ÐÃ/ÍÓ-ÄÏÓ BINARIES AND .à SOURCE ARE ALSO IN THE ARCHIVE TO CONVERT THE ×ORDSTAR DOCUMENTS TO ÁÓÃÉÉ TEXT. [ÁDDED BY ÇARY ÆIELD ÄEC 21,1993] ÔHERE IS ALSO A LOT OF GOOD INFORMATION AT NCRINFO.NCR.COM ==== ÑÕÅÓÔÉÏÎ: ×HERE CAN É GET ÓÃÓÉ DOCUMENTS? ÁÎÓ×ÅÒ #1 ÆROM: KEV@HPCPBLA.BRI.HP.COM (ËEVIN ÊONES) AND JMATROW@DONALD.×ICHITAËÓ.ÎÃÒ.ÃÏÍ (ÊOHN ÍATROW ==== ÔHE ONLY LITERATURE THAT É'M AWARE OF IS: ÔHE ÓÃÓÉ SPECIFICATION: ÁVAILABLE FROM: ÇLOBAL ÅNGINEERING ÄOCUMENTS 15 ÉNVERNESS ×AY ÅAST ÅNGLEWOOD ÃO 80112-5704 (800) 854-7179 ÓÃÓÉ-1: Ø3.131-1986 ÓÃÓÉ-2: Ø3.131-199X ÓÃÓÉ-3 Ø3Ô9.2/91-010Ò4 ×ORKING ÄRAFT (ÇLOBAL ÅNGINEERING ÄOCUMENTATION IN ÉRVINE, ÃÁ (714)261-1455??) ÓÃÓÉ-1: ÄOC # Ø3.131-1986 FROM ÁÎÓÉ, 1430 ÂROADWAY, ÎÙ, ÎÙ 10018 ÉÎ-ÄÅÐÔÈ ÅØÐÌÏÒÁÔÉÏÎ ÏÆ ÓÃÓÉ CAN BE OBTAINED FROM ÓOLUTION ÔECHNOLOGY, ÁTTN: ÓÃÓÉ ÐUBLICATIONS, ÐÏ 104, ÂOULDER ÃREEK, ÃÁ 95006, (408)338-4285, ÆÁØ (408)338-4374 ÔÈÅ ÓÃÓÉ ÅÎÃÙÌÏÐÅÄÉÁ AND THE ÓÃÓÉ ÂÅÎÃÈ ÒÅÆÅÒÅÎÃÅ CAN BE OBTAINED FROM ÅÎÄÌ ÐUBLISHING, 14426 ÂLACK ×ALNUT ÃT., ÓARATOGA, ÃÁ 95090, (408)867-6642, ÆÁØ (408)867-2115 ÓÃÓÉ: ÕÎÄÅÒÓÔÁÎÄÉÎÇ ÔÈÅ ÓÍÁÌÌ ÃÏÍÐÕÔÅÒ ÓÙÓÔÅÍ ÉÎÔÅÒÆÁÃÅ WAS PUBLISHED BY ÐRENTICE-ÈALL, ÉÓÂÎ 0-13-796855-8 (ÓEEMS TO BE OUT OF PRINT) ÁÎÓ×ÅÒ #2 ÆROM: ÇARY ÆIELD (GARYF@WIIS.WANG.COM) Á NEAT LITTLE BOOK CALLED "ÂASICS OF ÓÃÓÉ" SECOND EDITION, WAS SENT TO ME FREE OF CHARGE BY ÁNCOT ÃORPORATION, ÍENLO ÐARK, ÃÁ (415) 322-5322. ÉT GIVES A SIMPLIFIED DESCRIPTION OF HOW MOST ASPECTS OF THE ÓÃÓÉ BUS WORK AND INCLUDES SOME DISCUSSION OF ÓÃÓÉ-2 ISSUES. ÁÎÓ×ÅÒ #3 ÆROM: ÒUNAR ÊORGENSEN (RUNAR.JORGENSEN@FYS.UIO.NO) ÔHERE WAS A TWO PART ARTICLE IN ÂYTE ÍAGAZINE. ÔHE FIRST PART WAS IN ÆEB 1990 ISSUE, P. 267-274 AND THE SECOND WAS IN ÍAR 1990 ISSUE, P. 291-298. ÁNOTHER TWO PART ARTICLE APPEARED IN ÂYTE IN ÍAY 1986 AND ÊUNE 1986. ==== ÑÕÅÓÔÉÏÎ: ×HERE CAN É GET INFORMATION ON VARIOUS DISK DRIVES AND CONTROLLERS? ÁÎÓ×ÅÒ: EKRIEGER@QUASAR.HACKTIC.NL (ÅRIC ËRIEGER) (ÕPDATED ÎOV. 29, 1993) ==== ÄRIVE AND ÃONTROLLER ÇUIDE, ÖERSION 4.3 ÔÈÅÒÅÆ(TM) IS A COMPREHENSIVE ÄIRECTORY OF ÈARD ÄRIVES, ÆLOPPY ÄRIVES, ÏPTICAL ÄRIVES, AND ÄRIVE ÃONTROLLERS & ÈOST ÁDAPTERS. ÉT IS DESIGNED TO HELP THE NOVICE AND PRO ALIKE WITH INTEGRATION PROBLEMS AND SYSTEM SETUPS. ÉNFORMATION IS PROVIDED IN TWO HANDY FORMATS; ÐORTRAIT MODE, FOR THOSE WHO PREFER A NORMAL BOOK-BINDING TYPE PRINT FORMAT, AND(OR) DO NOT HAVE A PRINTER WITH ÌANDSCAPE CAPABILITY. ÁND ÌANDSCAPE MODE, FOR THOSE WHO PRE- FER A COMPUTER-PRINTOUT TYPE FORMAT. ÆOR PRINTING, A ÌASERJET IS PREFERRED, BUT NOT NECESSARY, AND SETUP INFO IS PROVIDED. ÆOR VIEWING, ÌÉÓÔ(TM) BY ÖERNON ÂUERG, WILL PROVIDE AN EXCELLENT RESULT, AND ALLOW TEXT SEARCHES FOR FINDING SPECIFIC MODELS. ÂY Æ. ÒOBERT ÆALBO ÔHE ARCHIVE IS AVAILABLE AT THE FOLLOWING SITES, ALL MEMBERS OF ÁMIÎET (LIST VALID IN ÎOVEMBER '93): ÕÓÁ (ÍÏ) FTP.WUSTL.EDU 128.252.135.4 PUB/AMINET/ ÕÓÁ (ÔØ) FTP.ETSU.EDU 192.43.199.20 PUB/AMINET/ ÕÓÁ (ÃÁ) FTP.CDROM.COM 192.153.46.2 PUB/AMINET/ ÓCANDINAVIA FTP.LUTH.SE 130.240.18.2 PUB/AMINET/ ÇERMANY FTP.UNI-KL.DE 131.246.9.95 PUB/AMINET/ ÇERMANY FTP.UNI-ERLANGEN.DE 131.188.1.43 PUB/AMINET/ ÇERMANY FTP.CS.TU-BERLIN.DE 130.149.17.7 PUB/AMINET/ ÇERMANY FTP.TH-DARMSTADT.DE 130.83.55.75 PUB/AMINET/ ÇERMANY FTP.UNI-PADERBORN.DE 131.234.2.32 PUB/AMINET/ ÇERMANY FTP.UNI-OLDENBURG.DE 134.106.40.9 PUB/AMINET/ ÓWITZERLAND FTP.EUNET.CH CHANGING PUB/AMINET/ ÓWITZERLAND LITAMIGA.EPFL.CH 128.178.151.32 PUB/AMINET/ (*) ÕË SRC.DOC.IC.AC.UK 146.169.2.1 PUB/AMINET/ ÁUSTRALIA SPLAT.AARNET.EDU.AU 192.107.107.6 PUB/AMINET/ (*) (*) CLOSED 6:30AM TO 4PM WEEKDAYS ÔHE ARCHIVE IS PRESENT AT: PUB/AMINET/TEXT/DOCS/ÔHEÒEF43.LHA [197 Ë] PUB/AMINET/TEXT/DOCS/ÔHEÒEF43.README ÎOTE: ×HEN EXTRACTING THE ARCHIVE ON NON-ÁMIGA MACHINES (I.E. ÍÓ-ÄÏÓ WITH ÌÈÁ213, ETC.) PLEASE USE THE OPTION -A0 TO DISABLE THE PRESERVATION OF THE FILE-ATTRIBUTES (OTHERWISE ÌÈÁ WILL SKIP THE FILES INSIDE THE ARCHIVE WITH THE MESSAGE "SPECIAL ATTRIBUTES"). ÔHE FILE IS ALSO ON FTP.FUNET.FI: PUB/DOC/DISKS/ÔHEÒEF43.LHA.2 [197 Ë] PUB/DOC/DISKS/ÔHEÒEF43.README.2 ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE TELEPHONE NUMBER OF ÁDAPTEC? ÁÎÓ×ÅÒ ÆROM: JCAPLES@NETCOM.COM (ÊON Ä ÃAPLES) ==== 408 945-8600 ÍAIN NUMBER 800 959 7274 TECH SUPPORT 800 442 7274 ORDERS DOC, NEW BIOS, ETC. ÁDAPTEC'S GENERAL INQUIRY NUMBER, 800-959-7274, AFFORDS ACCESS TO A ÆÁØ-BASED INFORMATION RETRIEVAL SYSTEM. ÉN ORDER TO PRESERVE THE ACCURACY OF THIS INFORMATION, É WON'T GO INTO DETAILS ABOUT HOW TO USE IT (SINCE ÁDAPTEC MAY CHANGE THINGS WITHOUT TELLING ME :). ÆOR THOSE OUTSIDE THE ÃÁÎ-ÕÓ AREA, OR LOCAL TO ÁDAPTEC THE DIRECT ÆÁØ INFO NUMBER IS (408) 957-7150. ÔHERE ARE THREE GENERAL TOPICS AS OF THIS WRITING: ÇENERAL ÉNFORMATION ÓALES ÉNFORMATION ÔECHNICAL ÉNFORMATION ÇIVE IT A CALL AND REQUEST THE DIRECTORY! ÁS OF THIS WRITING THERE ARE OVER 130 DOCUMENTS AVAILABLE. ÙOU NEED A TOUCHTONE PHONE AND THE FAX NUMBER. ÙOU'LL ALSO BE ASKED FOR AN EXTENSION NUMBER TO STAMP ON THE ÆÁØ WHICH WILL BE USED TO IDENTIFY THE RECIPIENT. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE TELEPHONE NUMBER OF ÁRCHIVE ÃORPORATION? ÁÎÓ×ÅÒ ÆROM: JDP@CALEB.ÕÕÃÐ (ÊIM ÐRITCHETT) ==== ÁRCHIVE ÃORPORATION (800) 537 2248 ÔECH ÓUPPORT (800) 227 6296 ÆÁØ (714) 641-2499 [ÁRCHIVE WAS BOUGHT BY ÃONNER IN 1993 - ÇARY ÆIELD] ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE TELEPHONE NUMBER OF ÆUJITSU? ÁÎÓ×ÅÒ ÆROM: ËEN ÐORTER (72420.2436@COMPUSERVE.COM) ==== ÆUJITSU ÆACTSÌINE ÆÁØ ÂACK SERVICE (408) 428-0456 Á SIX PAGE CATALOG OF AVAILABLE DOCUMENTS CAN BE ORDERED. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE ADDRESS AND TELEPHONE NUMBER FOR ÑUANTUM? ÁÎÓ×ÅÒ ÆROM: KMARTINE@QNTM.COM (ËEVIN ÍARTINEZ) ==== ÑUANTUM ÃORPORATION 500 ÍCÃARTHY ÂLVD. ÍILPITAS, ÃÁ 95035 ÔECHNICAL ÓUPPORT ÔELEPHONE ÎUMBERS: 800 826-8022 ÍAIN ÔECHNICAL ÓUPPORT ÎUMBER 408 894-3282 ÔECHNICAL ÓUPPORT ÆAX 408 894-3214 ÔECHNICAL ÓUPPORT ÂÂÓ Ö.32 8Î1 408 434-9262 ÔECHNICAL ÓUPPORT FOR ÐLUS ÄEVELOPMENT ÐRODUCTS 408 894-4000 ÍAIN ÑUANTUM ÐHONE NUMBER ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE TELEPHONE NUMBER FOR ÓEAGATE? ÁÎÓ×ÅÒ ÆROM: LANDIS@SUGS.TWARE.COM (ÈALE ÌANDIS) ==== ÈERE ARE THE NUMBERS FOR ÓEAGATE'S ÔECHNICAL ÓUPPORT. ÓEAÂÏÁÒÄ - ÂULLETIN ÂOARD ÓYSTEM AVAILABLE 24 HOURS. ÕSE 8 DATA BITS, NO PARITY, 1 STOP BIT (8-Î-1). ÕÓÁ/ÃANADA 408-438-8771 9600 BAUD* ÅNGLAND 44-62-847-8011 9600 BAUD* ÇERMANY 49-89-140-9331 2400 BAUD* ÓINGAPORE 65-292-6973 9600 BAUD* ÁUSTRALIA 61-2-756-2359 9600 BAUD* * - ÍAXIMUM BAUD RATE SUPPORTED. ÓEAÆÁØ 408-438-2620 ÕSE A TOUCH-TONE PHONE TO HAVE INFORMATION RETURNED TO YOU VIA ÆÁØ. ÁVAILABLE 24 HOURS. ÔECHNICAL ÓUPPORT ÆAX 408-438-8137 ÆÁØ YOUR QUESTIONS OR COMMENTS 24 HOURS. ÒESPONSES ARE SENT BETWEEN 8:00ÁÍ AND 5:00ÐÍ ÐÓÔ ÍONDAY THROUGH ÆRIDAY. ÓEAÆÏÎÅ 408-438-8222 ÐROVIDES RECORDED INFORMATION 24 HOURS OR TALK TO A TECHNICAL SPECIALIST BETWEEN 8:00ÁÍ TO 5:00ÐÍ ÐÓÔ ÍONDAY THROUGH ÆRIDAY. ÓEAÔÄÄ 408-438-5382 ÕSING A ÔELECOMMUNICATIONS ÄEVICE FOR THE ÄEAF, YOU CAN SEND QUESTIONS OR COMMENTS 24 HOURS OR HAVE A DIALOG WITH A TECHNICAL SUPPORT SPECIALIST BETWEEN 8:00ÁÍ AND 5:00ÐÍ ÐÓÔ ÍONDAY THROUGH ÆRIDAY. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE TELEPHONE NUMBER AND ADDRESS OF ÃONNER ÐERIPHERALS? ÁÎÓ×ÅÒ ÆROM: EKRIEGER@QUASAR.HACKTIC.NL (ÅRIC ËRIEGER) ==== ÃÏÎÎÅÒ ÐÅÒÉÐÈÅÒÁÌÓ, ÉNCORPORATED ×ÁÔÔÓ ÌÉÎÅ: 3081 ÚANKER ÒOAD ÐÁÙ ÌÉÎÅ: (408)456-4500 ÓAN ÊOSE ÃÁ 95134 ÆÁØ ÌÉÎÅ: ÂÂÓ ÌÉÎÅ: (408)456-4415 (Ö.32) ÃÏÎÎÅÒ (408)456-3200 ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE NUMBER FOR ÎÃÒ? ÁÎÓ×ÅÒ ÆROM: GKENDALL@NCR-MPD.ÆTÃOLLINSÃÏ.ÎÃÒ.ÃÏÍ (ÇUY ËENDALL) ==== ÆOR DATA MANUALS FOR ANY ÎÃÒ CHIPS, PLEASE CALL 800-334-5454 OR 719-630-3384. ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ÕLTRAÓTOR? ==== ÕLTRAÓTOR ÃORPORATION 47061 ×ARM ÓPRINGS ÂLVD. ÆREMONT, ÃÁ 94539 ÇENERAL (714)453-8170 ÒOB ÍCËINLEY (MCKINLEY@SPSS.COM) WRITES THAT ÕLTRAÓTORE IS NOW IN ÃHAPTER 11 AND THEIR ÔECH. ÓUPPORT NUMBER HAS BEEN TEMPORARILY DISCONNECTED. ÆÁØ (510)623-8953 ÂÂÓ (510)623-9091 ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ×ÁÎÇÔÅË? ÁÎÓ×ÅÒ ÆROM: "ÔERRY ËENNEDY, ÏPERATIONS ÍGR" ==== ×ANGTEK CAN BE REACHED AT: ×ÁÎÇÔÅË ÉNCORPORATED 41 ÍORELAND ÒOAD ÓIMI ÖALLEY, ÃÁ 93065 (805) 583-5255 [VOICE] (805) 583-8249 [ÆÁØ] (805) 582-3370 [ÂÂÓ] NOW CHANGED TO 582-3620 ×ÁÎÇÔÅË-ÅUROPE ÕNIT 1Á, ÁPOLLO ÈOUSE ÃALLEVA ÉNDUSTRIAL ÐARK ÁLDERMASTON, ÒEADING ÒÇ7 4Ñ× ÅNGLAND (44) 734-811463 [VOICE] (44) 734-816076 [ÆÁØ] 851-848135 [TELEX] ==== ÑÕÅÓÔÉÏÎ: ×HAT IS THE ADDRESS AND TELEPHONE NUMBER OF ×ESTERN ÄIGITAL? ÁÎÓ×ÅÒ ÆROM: UUNET!WHALE.ST.USM.EDU!RNIESS (ÒICK ÎIESS) ==== 1-714-753-1068 ×ESTERN ÄIGITAL 1-714-756-8176 ×ESTERN ÄIGITAL 1-714-753-1234 ×ESTERN ÄIGITAL 1200/2400 BAUD: 714-753-1234 9600 BAUD (ÈAYES): 714-753-1068 ==== ÑÕÅÓÔÉÏÎ: WHAT IS ÆÁÓÔ ÓÃÓÉ? ÁÎÓ×ÅÒ ÆROM: KEV@HPCPBLA.BRI.HP.COM (ËEVIN ÊONES) ==== ÔHERE ARE 2 HANDSHAKING MODES ON THE ÓÃÓÉ BUS, USED FOR TRANSFERRING DATA: ÁÓÙÎÃÈÒÏÎÏÕÓ AND ÓÙÎÃÈÒÏÎÏÕÓ. ÁÓÙÎÃÈÒÏÎÏÕÓ IS A CLASSIC ÒEQ/ÁCK HANDSHAKE. ÓÙÎÃÈÒÏÎÏÕÓ IS "SORT OF" ÒEQ/ÁCK, ONLY IT ALLOWS YOU TO ISSUE MULTIPLE ÒEQ'S BEFORE RECEIVING ÁCK'S. ×HAT THIS MEANS IN PRACTICE IS THAT ÓÙÎÃÈÒÏÎÏÕÓ TRANSFERS ARE APPROX 3 TIMES FASTER THAN ÁÓÙÎÃÈÒÏÎÏÕÓ. ÓÃÓÉ1 ALLOWED ASYNCHRONOUS TRANSFERS AT UP TO 1.5 ÍBYTES/ÓEC AND SYNCHRONOUS TRANSFERS AT UP TO 5.0 ÍBYTES/ÓEC. ÓÃÓÉ2 HAD SOME OF THE TIMING MARGINS "SHAVED" IN ORDER THAT FASTER HANDSHAKING COULD OCCUR. ÔHE RESULT IS THAT ASYNCHRONOUS TRANSFERS CAN RUN AT UP TO 3.0 ÍBYTES/ÓEC AND SYNCHRONOUS TRANSFERS AT UP TO 10.0 ÍBYTES/ÓEC. ÔHE TERM "ÆÁÓÔ" IS GENERALLY APPLIED TO A ÓÃÓÉ DEVICE WHICH CAN DO SYNCRHONOUS TRANSFERS AT SPEEDS IN EXCESS OF 5.0 ÍBYTES/ÓEC. ÔHIS TERM CAN ONLY BE APPLIED TO ÓÃÓÉ2 DEVICES SINCE ÓÃÓÉ1 DIDN'T HAVE THE TIMING MARGINS THAT ALLOW FOR ÆÁÓÔ TRANSFERS. ==== ÑÕÅÓÔÉÏÎ: ÓÃÓÉ TERMINATORS SHOULD MEASURE 136 OHMS? ÁÎÓ×ÅÒ ÆROM: STEVEL@COOS.DARTMOUTH.EDU (ÓTEVE ÌIGETT) ==== ÙES, THAT IS WHAT YOU SHOULD MEASURE. ÌET'S SEE HOW THAT IS SO. ÔHE TERMINATOR CONTAINS 18 220-OHM RESISTORS FROM SIGNALS TO TERMPOWER, AND 18 330-OHM RESISTORS FROM THOSE SIGNALS TO GROUND. É'VE DRAWN THAT BELOW: TERMPOWER--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý 220 OHMS-> Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý SIGNALS -> O O O O O O O O O O O O O O O O O O Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý 330 OHMS-> Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý GROUND --+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ ×HEN YOU MEASURE FROM ANY ONE SIGNAL TO TERMPOWER, YOU AREN'T MEASURING THAT RESISTOR IN ISOLATION, YOU ARE MEASURING THAT RESISTOR ÉÎ ÐÁÒÁÌÌÅÌ WITH THE COMBINATION OF THE CORRESPONDING 330 OHM RESISTOR PLUS 17 220+330 OHM RESISTOR PAIRS IN SERIES. É'VE REDRAWN THE SCHEMATIC TO MAKE THIS EASIER TO SEE: TERMPOWER--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò <- 220 OHMS Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý O O O O O O O O O O O O O O O O O Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò Ò <- 330 OHMS 220 OHMS Ò Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý Ý +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+-- GROUND Ý Ý Ý Ò <-- 330 OHMS Ý / SIGNAL -> O-/ <--------- OTHER STUFF THAT'S IN PARALLEL ----------> ×E'RE TRYING TO MEASURE THAT ONE RESISTOR FROM A SIGNAL TO TERMPOWER, BUT THERE'S A TON OF OTHER STUFF IN PARALLEL. ÔHE RESISTANCE OF THAT "STUFF" IS 330 + 550/17 OHMS (THE 330 OHM RESISTOR, IN SERIES WITH A PARALLEL COMBINATION OF 17 550 OHM RESISTORS). ÔHE GENERAL FORMULA FOR THE EQUIVALENT OF TWO RESISTANCES IN PARALLEL IS R1*R2/(R1+R2). ×HIPPING OUT MY TRUSTY SPREADSHEET, É FIND THAT THE "STUFF" HAS A RESISTANCE OF ABOUT 362 OHMS, AND THAT IN PARALLEL WITH 220 OHMS IS ABOUT 137 OHMS. ==== ÑÕÅÓÔÉÏÎ: ÃAN SOMEONE EXPLAIN TO ME THE DIFFERENCE BETWEEN 'NORMAL' SCSI AND DIFFERENTIAL SCSI? ÁÎÓ×ÅÒ ÆROM: RALF@WPI.×ÐÉ.ÅÄÕ (ÒALPH ÖALENTINO) ==== "ÎORMAL" ÓÃÓÉ IS ALSO CALLED "ÓINGLE-ENDED" ÓÃÓÉ. ÆOR EACH SIGNAL THAT NEEDS TO BE SENT ACROSS THE BUS, THERE EXISTS A WIRE TO CARRY IT. ×ITH DIFFERENTIAL ÓÃÓÉ, FOR EACH SIGNAL THAT NEEDS TO BE SENT ACROSS THE BUS, THERE EXISTS A PAIR OF WIRES TO CARRY IT. ÔHE FIRST IN THIS PAIR CARRIES THE SAME TYPE OF SIGNAL THE SINGLE-ENDED ÓÃÓÉ CARRIES. ÔHE SECOND IN THIS PAIR, HOWEVER, CARRIES ITS LOGICAL INVERSION. ÔHE RECEIVER TAKES THE DIFFERENCE OF THE PAIR (THUS THE NAME DIFFERENTIAL), WHICH MAKES IT LESS SUSCEPTIBLE TO NOISE AND ALLOWS FOR GREATER CABLE LENGTH. ==== ÑÕÅÓÔÉÏÎ: ×HAT ARE THE PINOUTS FOR DIFFERENTIAL ÓÃÓÉ? ÁÎÓ×ÅÒ ÆROM: RALF@WPI.×ÐÉ.ÅÄÕ (ÒALPH ÖALENTINO) ==== ÄIFFERENTIAL ÓÃÓÉ ÃONNECTOR ÐINOUTS ------------------------------------- ------------------------------------- Ý ÓÃÓÉ Ý Ý ÍÉÎÉ Ý Ý Ý ÓÃÓÉ Ý Ý ÍÉÎÉ Ý Ý Ý ÓÉÇÎÁÌÝ ÄÄ-50Ð Ý ÍÉÃÒÏ Ý ÄÄ-50ÓÁ Ý Ý ÓÉÇÎÁÌÝ ÄÄ-50Ð Ý ÍÉÃÒÏ Ý ÄÄ-50ÓÁ Ý ------------------------------------ ------------------------------------- Ý -ÇÎÄ Ý 2 Ý 26 Ý 34 Ý Ý (OPEN)Ý 1 Ý 1 Ý 1 Ý Ý -ÄÂ(0)Ý 4 Ý 27 Ý 2 Ý Ý +ÄÂ(0)Ý 3 Ý 2 Ý 18 Ý Ý -ÄÂ(1)Ý 6 Ý 28 Ý 19 Ý Ý +ÄÂ(1)Ý 5 Ý 3 Ý 35 Ý Ý -ÄÂ(2)Ý 8 Ý 29 Ý 36 Ý Ý +ÄÂ(2)Ý 7 Ý 4 Ý 3 Ý Ý -ÄÂ(3)Ý 10 Ý 30 Ý 4 Ý Ý +ÄÂ(3)Ý 9 Ý 5 Ý 20 Ý Ý -ÄÂ(4)Ý 12 Ý 31 Ý 21 Ý Ý +ÄÂ(4)Ý 11 Ý 6 Ý 37 Ý Ý -ÄÂ(5)Ý 14 Ý 32 Ý 38 Ý Ý +ÄÂ(5)Ý 13 Ý 7 Ý 5 Ý Ý -ÄÂ(6)Ý 16 Ý 33 Ý 6 Ý Ý +ÄÂ(6)Ý 15 Ý 8 Ý 22 Ý Ý -ÄÂ(7)Ý 18 Ý 34 Ý 23 Ý Ý +ÄÂ(7)Ý 17 Ý 9 Ý 39 Ý Ý -ÄÂ(Ð)Ý 20 Ý 35 Ý 40 Ý Ý +ÄÂ(Ð)Ý 19 Ý 10 Ý 7 Ý Ý ÇÎÄ Ý 22 Ý 36 Ý 8 Ý ÝÄÉÆÓÅÎÓÝ 21 Ý 11 Ý 24 Ý Ý ÇÎÄ Ý 24 Ý 37 Ý 25 Ý Ý ÇÎÄ Ý 23 Ý 12 Ý 41 Ý ÝÔÅÒÍÐ×ÒÝ 26 Ý 38 Ý 42 Ý ÝÔÅÒÍÐ×ÒÝ 25 Ý 13 Ý 9 Ý Ý ÇÎÄ Ý 28 Ý 39 Ý 10 Ý Ý ÇÎÄ Ý 27 Ý 14 Ý 26 Ý Ý -ÁÔÎ Ý 30 Ý 40 Ý 27 Ý Ý +ÁÔÎ Ý 29 Ý 15 Ý 43 Ý Ý ÇÎÄ Ý 32 Ý 41 Ý 44 Ý Ý ÇÎÄ Ý 31 Ý 16 Ý 11 Ý Ý -ÂÓÙ Ý 34 Ý 42 Ý 12 Ý Ý +ÂÓÙ Ý 33 Ý 17 Ý 28 Ý Ý -ÁÃË Ý 36 Ý 43 Ý 29 Ý Ý +ÁÃË Ý 35 Ý 18 Ý 45 Ý Ý -ÒÓÔ Ý 38 Ý 44 Ý 46 Ý Ý +ÒÓÔ Ý 37 Ý 19 Ý 13 Ý Ý -ÍÓÇ Ý 40 Ý 45 Ý 14 Ý Ý +ÍÓÇ Ý 39 Ý 20 Ý 30 Ý Ý -ÓÅÌ Ý 42 Ý 46 Ý 31 Ý Ý +ÓÅÌ Ý 41 Ý 21 Ý 47 Ý Ý -Ã/Ä Ý 44 Ý 47 Ý 48 Ý Ý +Ã/Ä Ý 43 Ý 22 Ý 15 Ý Ý -ÒÅÑ Ý 46 Ý 48 Ý 16 Ý Ý +ÒÅÑ Ý 45 Ý 23 Ý 32 Ý Ý -É/Ï Ý 48 Ý 49 Ý 33 Ý Ý +É/Ï Ý 47 Ý 24 Ý 49 Ý Ý ÇÎÄ Ý 50 Ý 50 Ý 50 Ý Ý ÇÎÄ Ý 49 Ý 25 Ý 17 Ý ---------------------------------------------------------------------------- ÐLEASE NOTE THAT É CAN ONLY VERIFY THE ÄÄ-50Ð CONNECTOR. ÔHE ÍINI ÍICRO AND ÄÄ-50ÓÁ PINOUT ABOVE IS A PIN FOR PIN MAPPING FROM THE ÓÃÓÉ PINOUT IN THE ÆÁÑ. ÈOW TO TELL IF YOU HAVE A SINGLE ENDED OR DIFFERENTIAL DRIVE: - ÕSE AN OHM METER TO CHECK THE RESISTANCE BETWEEN PINS 21 & 22. ÏN A SINGLE ENDED SYSTEM, THEY SHOULD BOTH BE TIED TOGETHER AND TIED TO ÇÎÄ. ÏN THE DIFFERENTIAL DRIVE, THEY SHOULD BE OPEN OR HAVE A SIGNIFICANT RESISTANCE BETWEEN THEM. ÎOTE THAT MOST DRIVES TODAY ARE SINGLE ENDED SO YOU USUALLY ONLY HAVE TO WORRY ABOUT THIS WITH OLD DRIVES SCAVENGED FROM OTHER SYSTEMS. [ ÅDITOR'S NOTE: ÔHE PRECEEDING COMMENT ABOUT DIFFERENTIAL DRIVES BEING OLD IS NOT VALID. ÄIFFERENTIAL DRIVES ARE LESS COMMON THAN SINGLE-ENDED ONES, BECAUSE THEY ARE MAINLY USED ONLY WHERE LONGER CABLE RUNS ARE NECESSARY, AND THEY ARE NOT GENERALLY USED IN ÐÃS, BUT STATE OF THE ART DRIVES ARE AVAILABLE WITH DIFFERENTIAL INTERFACES. ÇENERALLY ONLY THE HIGHER PERFORMANCE DRIVES HAVE A DIFFERENTIAL OPTION BECAUSE OF THE ADDED COST. - ÇARY ÆIELD ] ==== ÑÕÅÓÔÉÏÎ: ×HAT ARE THE PINOUTS FOR ÓÃÓÉ CONNECTORS? ÁÎÓ×ÅÒ ÆROM: SNIVELY@SCSI.ÅNG.ÓUN.ÃÏÍ (ÂOB ÓNIVELY) ==== ÏRIGINALLY DATED ÍAY 23, 1990 ÔHE CONNECTOR FAMILIES DESCRIBED BY THE DRAWINGS HAVE STANDARD PIN NUMBERINGS WHICH ARE DESCRIBED THE SAME WAY BY ALL VENDORS THAT É HAVE ENCOUNTERED. ÔHE ÓÃÓÉ-2 SPECIFICATION IDENTIFIES THE STANDARD NUMBERING, USING THAT CONVENTION. ÉT HAPPENED TO BE DOCUMENTED BY ÁÍÐ, BUT ALL THE VENDORS USE THE SAME CONVENTION. ÔHE FOLLOWING DIAGRAMS HAVE THE OUTLINE DRAWINGS OF CONNECTOR SOCKETS AT THE BOTTOM. ÔHIS IS REALLY FOR REFERENCE ONLY, BECAUSE THE CONNECTOR SOCKETS AND PLUGS ARE BOTH SPECIFIED AS TO THEIR NUMBERING AND USUALLY ARE LABELED. ÔHERE ARE SOME MINOR PROBLEMS IN NAMING THE MICROCONNECTOR CONDUCTOR PAIRS, WHICH É HAVE CORRECTED IN THE ENCLOSED DIAGRAM. ÁLL THE CONDUCTOR PAIRS OF THE ÍINI-ÍICRO (ÈIGH ÄENSITY) CONNECTOR ARE IN FACT PASSED THROUGH ON THE CABLES. ÓÃÓÉ-2 DEFINES THE ÒÓÒ (ÒESERVED) LINES AS MAYBE GROUND OR MAYBE OPEN, BUT THEY ARE STILL PASSED THROUGH THE CABLE. ÍOST PRESENT STANDARD ÓÃÓÉ DEVICES WILL GROUND THOSE LINES. -------------------- MICROÓÃÓÉ TO ÓÃÓÉ ÄIAGRAM --------------------------- ÓÃÓÉ ÃONNECTOR ÐINOUTS ------------------------------------- ------------------------------------- Ý ÓÃÓÉ Ý Ý ÍÉÎÉ Ý Ý Ý ÓÃÓÉ Ý Ý ÍÉÎÉ Ý Ý Ý ÓÉÇÎÁÌÝ ÄÄ-50Ð Ý ÍÉÃÒÏ Ý ÄÄ-50ÓÁ Ý Ý ÓÉÇÎÁÌÝ ÄÄ-50Ð Ý ÍÉÃÒÏ Ý ÄÄ-50ÓÁ Ý ------------------------------------ ------------------------------------- Ý -ÄÂ(0)Ý 2 Ý 26 Ý 34 Ý Ý ÇÎÄ Ý 1 Ý 1 Ý 1 Ý Ý -ÄÂ(1)Ý 4 Ý 27 Ý 2 Ý Ý ÇÎÄ Ý 3 Ý 2 Ý 18 Ý Ý -ÄÂ(2)Ý 6 Ý 28 Ý 19 Ý Ý ÇÎÄ Ý 5 Ý 3 Ý 35 Ý Ý -ÄÂ(3)Ý 8 Ý 29 Ý 36 Ý Ý ÇÎÄ Ý 7 Ý 4 Ý 3 Ý Ý -ÄÂ(4)Ý 10 Ý 30 Ý 4 Ý Ý ÇÎÄ Ý 9 Ý 5 Ý 20 Ý Ý -ÄÂ(5)Ý 12 Ý 31 Ý 21 Ý Ý ÇÎÄ Ý 11 Ý 6 Ý 37 Ý Ý -ÄÂ(6)Ý 14 Ý 32 Ý 38 Ý Ý ÇÎÄ Ý 13 Ý 7 Ý 5 Ý Ý -ÄÂ(7)Ý 16 Ý 33 Ý 6 Ý Ý ÇÎÄ Ý 15 Ý 8 Ý 22 Ý Ý -ÄÂ(Ð)Ý 18 Ý 34 Ý 23 Ý Ý ÇÎÄ Ý 17 Ý 9 Ý 39 Ý Ý ÇÎÄ Ý 20 Ý 35 Ý 40 Ý Ý ÇÎÄ Ý 19 Ý 10 Ý 7 Ý Ý ÇÎÄ Ý 22 Ý 36 Ý 8 Ý Ý ÇÎÄ Ý 21 Ý 11 Ý 24 Ý Ý ÒÓÒ Ý 24 Ý 37 Ý 25 Ý Ý ÒÓÒ Ý 23 Ý 12 Ý 41 Ý ÝÔÅÒÍÐ×ÒÝ 26 Ý 38 Ý 42 Ý Ý ÏÐÅÎ Ý 25 Ý 13 Ý 9 Ý Ý ÒÓÒ Ý 28 Ý 39 Ý 10 Ý Ý ÒÓÒ Ý 27 Ý 14 Ý 26 Ý Ý ÇÎÄ Ý 30 Ý 40 Ý 27 Ý Ý ÇÎÄ Ý 29 Ý 15 Ý 43 Ý Ý -ÁÔÎ Ý 32 Ý 41 Ý 44 Ý Ý ÇÎÄ Ý 31 Ý 16 Ý 11 Ý Ý ÇÎÄ Ý 34 Ý 42 Ý 12 Ý Ý ÇÎÄ Ý 33 Ý 17 Ý 28 Ý Ý ÂÓÙ Ý 36 Ý 43 Ý 29 Ý Ý ÇÎÄ Ý 35 Ý 18 Ý 45 Ý Ý -ÁÃË Ý 38 Ý 44 Ý 46 Ý Ý ÇÎÄ Ý 37 Ý 19 Ý 13 Ý Ý -ÒÓÔ Ý 40 Ý 45 Ý 14 Ý Ý ÇÎÄ Ý 39 Ý 20 Ý 30 Ý Ý -ÍÓÇ Ý 42 Ý 46 Ý 31 Ý Ý ÇÎÄ Ý 41 Ý 21 Ý 47 Ý Ý -ÓÅÌ Ý 44 Ý 47 Ý 48 Ý Ý ÇÎÄ Ý 43 Ý 22 Ý 15 Ý Ý -Ã/Ä Ý 46 Ý 48 Ý 16 Ý Ý ÇÎÄ Ý 45 Ý 23 Ý 32 Ý Ý -ÒÅÑ Ý 48 Ý 49 Ý 33 Ý Ý ÇÎÄ Ý 47 Ý 24 Ý 49 Ý Ý -É/Ï Ý 50 Ý 50 Ý 50 Ý Ý ÇÎÄ Ý 49 Ý 25 Ý 17 Ý ---------------------------------------------------------------------------- * Îà = ÎÏÔ ÃÏÎÎÅÃÔÅÄ ÃÏÎÎÅÃÔÏÒ ÔÙÐÅÓ: ÄÄ-50ÓÁ ------------------------ ÍÉÎÉ-ÍÉÃÒÏ ÄÄ-50Ð Ý ------------------- Ý --------------------- -------------- Ý17 \O O O O O O O O O/1 Ý Ý ----------------- Ý 49Ý O O O O O O Ý1 Ý 33 \ O O O O O O O /18 Ý Ý25\ O O O O O O O /1Ý 50Ý O O O O O O Ý2 Ý 50 \O O O O O O O/ 34 Ý Ý 50\O O O O O O O/26Ý --------------- Ý ------------- Ý Ý -------------- Ý -------------------------- ---------------------- (ÖÉÅ×ÅÄ ÆÒÏÍ ÆÁÃÅ ÏÆ ÃÏÎÎÅÃÔÏÒ - ÕÓÅ ÖÅÎÄÏÒ ÎÕÍÂÅÒÉÎÇ ÓÙÓÔÅÍ ÁÓ ÓÐÅÃÉÆÉÅÄ) ÁÎÓ×ÅÒ ÆROM: ÇARY ÆIELD (GARYF@WIIS.WANG.COM) ÍACINTOSH ÐLUS ÓÃÓÉ ÃONNECTOR ÐINOUTS ÎOTE THAT THIS CONNECTOR IS ÎÏÎ ÃÏÍÐÌÉÁÎÔ ×ÉÔÈ ÁÎÙ ÓÃÓÉ ÓÔÁÎÄÁÒÄ! ÔHE GROUNDING IS INSUFFICIENT AND DOES NOT ALLOW FOR PROPER TWISTED-PAIR TRANSMISSION LINE IMPLEMENTATION. ÉT IS RECOMMENDED THAT A SHORT ADAPTER CABLE BE USED TO CONVERT TO THE MORE COMMON ÃENTRONICS STYLE 50 PIN CONNECTION RATHER THAN EXTEND THE 25 PIN CONNECTION ANY FURTHER THAN NECESSARY. ÔHE ÍACINTOSH ÐLUS USED A ÎÃÒ 5380 ÓÃÓÉ CHIP CONTROLLED BY THE ÍÃ68000 PROCESSOR. ------------------- Ý ÓÃÓÉ Ý Ý Ý ÓÉÇÎÁÌÝ ÄÂ-25Ó Ý +-----------------+ ÄÂ-25Ó (FEMALE) Ý -ÄÂ(0)Ý 8 Ý ----------------------------- Ý -ÄÂ(1)Ý 21 Ý 13\ O O O O O O O O O O O O O /1 Ý -ÄÂ(2)Ý 22 Ý 25\ O O O O O O O O O O O O /14 Ý -ÄÂ(3)Ý 10 Ý ------------------------ Ý -ÄÂ(4)Ý 23 Ý ÖIEW FROM REAR OF COMPUTER. Ý -ÄÂ(5)Ý 11 Ý Ý -ÄÂ(6)Ý 12 Ý Ý -ÄÂ(7)Ý 13 Ý Ý -ÄÂ(Ð)Ý 20 Ý Ý ÇÎÄ Ý 7,9,14 Ý Ý ÇÎÄ Ý16,18,24 Ý Ý -ÁÔÎ Ý 17 Ý Ý ÂÓÙ Ý 6 Ý Ý -ÁÃË Ý 5 Ý Ý -ÒÓÔ Ý 4 Ý Ý -ÍÓÇ Ý 2 Ý Ý -ÓÅÌ Ý 19 Ý Ý -Ã/Ä Ý 15 Ý Ý -ÒÅÑ Ý 1 Ý Ý -É/Ï Ý 3 Ý +-----------------+ ÐIN 25 IS ÎÏÔ ÃÏÎÎÅÃÔÅÄ -- --/* ÇARY Á. ÆIELD - ×Á1ÇÒÃ, ×ANG ÌABS Í/Ó 019-72Â, 1 ÉNDUSTRIAL ÁVE ÌOWELL, ÍÁ 01851-5161, (508) 967-2514, EMAIL: GARYF@WIIS.WANG.COM, ÅÓÔ5ÅÄÔ Á WAIST IS A TERRIBLE THING