Newsgroups: alt.folklore.computers Subject: IBM 3270 Personal Computer w/ PC/370 Board? Organization: George Washington University X-Newsreader: trn 4.0-test72 (19 April 1999) From: jeffreyb@gwu.edu (Jeffrey Boulier) Lines: 31 Message-ID: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Date: Sat, 09 Jun 2001 17:09:15 GMT NNTP-Posting-Host: 128.164.127.203 X-Complaints-To: sagadmin@gwu.edu X-Trace: grover.nit.gwu.edu 992106555 128.164.127.203 (Sat, 09 Jun 2001 13:09:15 EDT) NNTP-Posting-Date: Sat, 09 Jun 2001 13:09:15 EDT Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!news.maxwell.syr.edu!feeder.qis.net!washdc3-snh1.gtei.net!washdc3-snf1!news.gtei.net!grover.nit.gwu.edu!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83238 Hi folks, I've just acquired an IBM 5371. It is labeled as an IBM 3270 Personal Computer. On the inside is a pair of joined cards, labled "PC/370 Board". Both have rows of boring chips, but the first one has two motorolas on it -- M 8519388 M4481512 XE328775 XE874743 CG88322BMD CC18318CMP SC81181R8 SC81171R Could this actually be one of the old systems that implemented a subset of the 370 architecture, and ran a "user" version of VM/CMS? Even if it isn't, more pressing question for me is "what the heck is the video out"? There is a DB25 connector on the back, which I think is a serial connector. The other candidate has 36 pins and looks reasonably unique. Is there any kind of adapter that would make this work with a VGA monitor? Do I need to hunt down another ancient IBM PC in order to get a monitor that would work? Yours Truly, Jeffrey Boulier -- Community Source & Support ------=>Prometheus<=------ Newsgroups: alt.folklore.computers Subject: IBM 3270 Personal Computer w/ PC/370 Board? Organization: George Washington University X-Newsreader: trn 4.0-test72 (19 April 1999) From: jeffreyb@gwu.edu (Jeffrey Boulier) Lines: 31 Message-ID: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Date: Sat, 09 Jun 2001 17:09:15 GMT NNTP-Posting-Host: 128.164.127.203 X-Complaints-To: sagadmin@gwu.edu X-Trace: grover.nit.gwu.edu 992106555 128.164.127.203 (Sat, 09 Jun 2001 13:09:15 EDT) NNTP-Posting-Date: Sat, 09 Jun 2001 13:09:15 EDT Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!news.maxwell.syr.edu!feeder.qis.net!washdc3-snh1.gtei.net!washdc3-snf1!news.gtei.net!grover.nit.gwu.edu!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83238 Hi folks, I've just acquired an IBM 5371. It is labeled as an IBM 3270 Personal Computer. On the inside is a pair of joined cards, labled "PC/370 Board". Both have rows of boring chips, but the first one has two motorolas on it -- M 8519388 M4481512 XE328775 XE874743 CG88322BMD CC18318CMP SC81181R8 SC81171R Could this actually be one of the old systems that implemented a subset of the 370 architecture, and ran a "user" version of VM/CMS? Even if it isn't, more pressing question for me is "what the heck is the video out"? There is a DB25 connector on the back, which I think is a serial connector. The other candidate has 36 pins and looks reasonably unique. Is there any kind of adapter that would make this work with a VGA monitor? Do I need to hunt down another ancient IBM PC in order to get a monitor that would work? Yours Truly, Jeffrey Boulier -- Community Source & Support ------=>Prometheus<=------ ###### Message-ID: <3B2283EA.B5E8F6F3@ev1.net> Date: Sat, 09 Jun 2001 13:15:38 -0700 From: Charles Richmond Reply-To: richmond@ev1.net Organization: Cannine Computer Center X-Mailer: Mozilla 4.7C-CCK-MCD {C-UDP; EBM-APPLE} (Macintosh; I; PPC) X-Accept-Language: en MIME-Version: 1.0 Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit NNTP-Posting-Host: c1656384-a.plano1.tx.home.com X-Trace: newsa.ev1.net 992110553 c1656384-a.plano1.tx.home.com (9 Jun 2001 13:15:53 -0500) Lines: 18 X-Authenticated-User: richmond Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!newsfeed00.sul.t-online.de!t-online.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.skycache.com!Cidera!newsa.ev1.net Xref: chonsp.franklin.ch alt.folklore.computers:83580 Jeffrey Boulier wrote: > > Hi folks, > > I've just acquired an IBM 5371. It is labeled as an IBM 3270 > Personal Computer. On the inside is a pair of joined cards, labled "PC/370 > Board". Both have rows of boring chips, but the first one has two > motorolas on it -- > IIRC, IBM licensed the MC68000 core for the PC/370 board. They used *two* of these cores and some custom microprogramming on it to implement the 370 instruction set... There was an issue of BYTE in the 1980's that had an article about this computer...I can *not* remember which issue... -- +-------------------------------------------------------------+ | Charles and Francis Richmond | +-------------------------------------------------------------+ ###### Message-ID: <3B22A2B6.3219B31B@trailing-edge.com> Date: Sat, 09 Jun 2001 22:27:02 -0400 From: Tim Shoppa Organization: Trailing Edge Technology X-Mailer: Mozilla 3.03Gold (X11; I; OpenVMS V7.2 AlphaServer 1200 5/533 4MB) MIME-Version: 1.0 Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 20 NNTP-Posting-Host: 63.73.218.130 X-Trace: reader1.news.uu.net 992140023 9023 63.73.218.130 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!news.maxwell.syr.edu!news.stealth.net!newsfeed.nyc.globix.net!uunet!ash.uu.net!spool1.news.uu.net!spool0.news.uu.net!reader1.news.uu.net!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83233 Jeffrey Boulier wrote: > Even if it isn't, more pressing question for me is "what the heck > is the video out"? > > There is a DB25 connector on the back, which I think is a serial > connector. The other candidate has 36 pins and looks reasonably unique. Is > there any kind of adapter that would make this work with a VGA monitor? Most likely video adapters for a true-blue 3270 would be monochrome graphics (a 9-pin connector) or a CGA (I think also 9 pins, though I'm sure I'll be corrected if I'm wrong!) If you insist on using a VGA monitor, just about any ISA-bus VGA card will do fine in emulating monochrome mode. There are still bazillions of 9-pin monochrome video displays out there, and they are still being made new although you won't find them at your local big box computer store. Tim. ###### From: William Hamblen Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Message-ID: References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> <3B22A2B6.3219B31B@trailing-edge.com> X-Newsreader: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 16 NNTP-Posting-Date: Sun, 10 Jun 2001 00:04:01 CDT Organization: Giganews.Com - Premium News Outsourcing X-Trace: sv3-pRQ2IHPfUJWX1WEcepARIIU7dArSvAQIJ8QikOJxxlK51JR86C18tH300t7X1FtE1EMQPLfAG6Dilp0!yJCwAE1DyOuYEeimrqUdehZZ5dRPmnwL3K7mhiWOKKMVn+xtGxdkPOfq2QDaVXcQVbsOyLk4G91r!v4QmrO9Y X-Complaints-To: abuse@GigaNews.Com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-Info: Please be sure to forward a copy of ALL headers X-Abuse-Info: Otherwise we will be unable to process your complaint properly Date: Sun, 10 Jun 2001 05:04:01 GMT Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!newsfeed-zh.ip-plus.net!news.ip-plus.net!news-out.nuthinbutnews.com!propagator!feed2.newsfeeds.com!newsfeeds.com!news-out.cwix.com!newsfeed.cwix.com!newsfeed.direct.ca!look.ca!border1.nntp.aus1.giganews.com!nntp3.aus1.giganews.com!news3.aus1.giganews.com.POSTED!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83252 On Sat, 09 Jun 2001 22:27:02 -0400, Tim Shoppa wrote: >Most likely video adapters for a true-blue 3270 would be >monochrome graphics (a 9-pin connector) or a CGA (I think also >9 pins, though I'm sure I'll be corrected if I'm wrong!) The 3270 PC that lived in our office for a while had a color monitor with a "different" connector that was definitely not the same as MDA or CGA. I don't recall the number of pins, but I'm pretty sure it wasn't 36. The machine displayed only color text. There was a bit mapped graphics option, but we didn't buy that. Internally it was like an XT in that it had 8 bit expansion slots with several additional circuit boards plugged in to support the 3270 functions. The system board was not the same as an XT, however. ###### From: mikekingston@cix.co.uk (Michael J Kingston) Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Date: Wed, 13 Jun 2001 22:06 +0100 (BST) Organization: CIX - Compulink Information eXchange Lines: 48 Message-ID: References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Reply-To: mikekingston@cix.co.uk NNTP-Posting-Host: 5300-tele-2-cluster.75.ip-pool.cix.co.uk Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!news-fra1.dfn.de!news-lei1.dfn.de!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!unlisys!news.snafu.de!news1.ebone.net!news.ebone.net!easynet-monga!easynet.net!news-feed.power.net.uk!peernews.cix.co.uk!news.cix.co.uk!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83504 In article <%KsU6.1136$K6.60043@grover.nit.gwu.edu>, jeffreyb@gwu.edu (Jeffrey Boulier) wrote: > > Hi folks, > > I've just acquired an IBM 5371. It is labeled as an IBM 3270 > Personal Computer. On the inside is a pair of joined cards, labled > "PC/370 > Board". Both have rows of boring chips, but the first one has two > motorolas on it -- > > M 8519388 M4481512 > XE328775 XE874743 > CG88322BMD CC18318CMP > SC81181R8 SC81171R > > Could this actually be one of the old systems that implemented a subset > of > the 370 architecture, and ran a "user" version of VM/CMS? > > Even if it isn't, more pressing question for me is "what the heck > is the video out"? > > There is a DB25 connector on the back, which I think is a serial > connector. The other candidate has 36 pins and looks reasonably unique. > Is there any kind of adapter that would make this work with a VGA > monitor? Do I need to hunt down another ancient IBM PC in order to get > a monitor that would work? > > Yours Truly, > Jeffrey Boulier > > -- > Community Source & Support > ------=>Prometheus<=------ > I used one that had so many cards that it required two system boxes. 3270PC was basically a 3278 emulator. This particular one had a plotter attached via an IEEE bus, probably because it was installed for the person who supported GDDM in that installation. I inherited that support responsibility along with the machine and was fortunate in that there was no call from users for GDDM expertise! I don't remember why the machine had any attraction for me. There might be some APL connection, though why it would have been better than a 3278, I don't know. Mike Kingston ###### From: "Larry" Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Date: Wed, 13 Jun 2001 20:48:10 -0700 Organization: http://extra.newsguy.com Lines: 37 Message-ID: <9g9cks0m2f@enews2.newsguy.com> References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> NNTP-Posting-Host: p-411.newsdawg.com X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!news-fra1.dfn.de!news-lei1.dfn.de!news-was.dfn.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!howland.erols.net!news-out.worldnet.att.net.MISMATCH!wn3feed!worldnet.att.net!24.0.0.38!newshub2.rdc1.sfba.home.com!news.home.com!pln-w!spln!dex!extra.newsguy.com!newsp.newsguy.com!enews2 Xref: chonsp.franklin.ch alt.folklore.computers:83531 "Jeffrey Boulier" wrote in message news:%KsU6.1136$K6.60043@grover.nit.gwu.edu... > > Hi folks, > > I've just acquired an IBM 5371. It is labeled as an IBM 3270 > Personal Computer. On the inside is a pair of joined cards, labled "PC/370 > Board". Both have rows of boring chips, but the first one has two > motorolas on it -- > > M 8519388 M4481512 > XE328775 XE874743 > CG88322BMD CC18318CMP > SC81181R8 SC81171R > > Could this actually be one of the old systems that implemented a subset of > the 370 architecture, and ran a "user" version of VM/CMS? > The card set that emulated a 370, at least the AT version, is similar to what you describe. Mine does not have a coax connector but I used an XT version of this thing that I remember did have a coax connection. It could have involved an additional card. The cms emulator product needs some software to work, think it was called VM/PC. I have the AT version but not the software or manual. I'd be VERY grateful if somebody who has these would be willing to make a copy for me. The two Mot chips on mine are identified as: M 8519386 M 4481512 XE 328775 XE 331092 CG88329D MD GN78423A MD SC81181R8 SC81171R Larry ###### From: "Larry" Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Date: Wed, 13 Jun 2001 20:52:50 -0700 Organization: http://extra.newsguy.com Lines: 59 Message-ID: <9g9clr0m3u@enews2.newsguy.com> References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> NNTP-Posting-Host: p-429.newsdawg.com X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!newsfeed00.sul.t-online.de!t-online.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.stanford.edu!pln-w!spln!dex!extra.newsguy.com!newsp.newsguy.com!enews2 Xref: chonsp.franklin.ch alt.folklore.computers:83532 "Jeffrey Boulier" wrote in message news:%KsU6.1136$K6.60043@grover.nit.gwu.edu... > > Hi folks, > > I've just acquired an IBM 5371. It is labeled as an IBM 3270 > Personal Computer. On the inside is a pair of joined cards, labled "PC/370 > Board". Both have rows of boring chips, but the first one has two > motorolas on it -- > > M 8519388 M4481512 > XE328775 XE874743 > CG88322BMD CC18318CMP > SC81181R8 SC81171R > > Could this actually be one of the old systems that implemented a subset of > the 370 architecture, and ran a "user" version of VM/CMS? > "Jeffrey Boulier" wrote in message news:%KsU6.1136$K6.60043@grover.nit.gwu.edu... > > Hi folks, > > I've just acquired an IBM 5371. It is labeled as an IBM 3270 > Personal Computer. On the inside is a pair of joined cards, labled "PC/370 > Board". Both have rows of boring chips, but the first one has two > motorolas on it -- > > M 8519388 M4481512 > XE328775 XE874743 > CG88322BMD CC18318CMP > SC81181R8 SC81171R > > Could this actually be one of the old systems that implemented a subset of > the 370 architecture, and ran a "user" version of VM/CMS? > The card set that emulated a 370, at least the AT version, is similar to what you describe. Mine does not have a coax connector but I used an XT version of this thing that I remember did have a coax connection. It could have involved an additional card. The cms emulator product needs some software to work, think it was called VM/PC. I have the AT version but not the software or manual. I'd be VERY grateful if somebody who has these would be willing to make a copy for me. The two Mot chips on mine are identified as: M 8519386 M 4481512 XE 328775 XE 331092 CG88329D MD GN78423A MD SC81181R8 SC81171R Larry ###### From: glass2@glass2.lexington.ibm.com Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Date: 14 Jun 2001 13:43:40 GMT Organization: IBM Austin Lines: 127 Message-ID: <9gaf2c$irq$2@ausnews.austin.ibm.com> References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> <9g9cks0m2f@enews2.newsguy.com> Reply-To: wa4qal@vnet.ibm.com NNTP-Posting-Host: glass2.cv.lexington.ibm.com X-Newsreader: IBM NewsReader/2 2.0 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!newsfeeds.belnet.be!news.belnet.be!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsxfer.eecs.umich.edu!news.cc.utah.edu!newsfeed.cs.utexas.edu!geraldo.cc.utexas.edu!tivoli.com!ausnews.austin.ibm.com!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83707 In <9g9cks0m2f@enews2.newsguy.com>, "Larry" writes: > >"Jeffrey Boulier" wrote in message >news:%KsU6.1136$K6.60043@grover.nit.gwu.edu... >> >> Hi folks, >> >> I've just acquired an IBM 5371. It is labeled as an IBM 3270 >> Personal Computer. On the inside is a pair of joined cards, labled "PC/370 >> Board". Both have rows of boring chips, but the first one has two >> motorolas on it -- >> >> M 8519388 M4481512 >> XE328775 XE874743 >> CG88322BMD CC18318CMP >> SC81181R8 SC81171R >> >> Could this actually be one of the old systems that implemented a subset of >> the 370 architecture, and ran a "user" version of VM/CMS? >> >The card set that emulated a 370, at least the AT version, is similar to >what you describe. Mine does not have a coax connector but I used an XT >version of this thing that I remember did have a coax connection. It could >have involved an additional card. The cms emulator product needs some >software to work, think it was called VM/PC. I have the AT version but not >the software or manual. I'd be VERY grateful if somebody who has these >would be willing to make a copy for me. The two Mot chips on mine are >identified as: > >M 8519386 M 4481512 >XE 328775 XE 331092 >CG88329D MD GN78423A MD >SC81181R8 SC81171R > >Larry I have vague memories (unsuccessfully repressed) of when I had a 3270PC. If I remember correctly, the display card-set consisted of one card for the display, another optional card which could be installed adjacent to the display card and which was attached to the display card via a jumper cable that was installed on the tops of the cards which was for the all points addressable feature, and yet another optional card which could be installed adjacent to the display card (on the other side from the all points addressable card) and which was attached to the display card via a jumper cable that was installed on the tops of the cards which was for the programmable symbol set. Thus, the entire display card complement, when all of the options were installed, consisted of three cards. Then, there was a card which the keyboard plugged into. Finally, there was usually at least a 3270 coax attach card. Add in a hard disk controller card, a floppy disk controller card, and usually a serial port card, and you've taken up seven of the 8 possible slots. The keyboard that these machines used, if I'm remembering correctly (and I've been trying to repress those memories), was an expanded keyboard with quite a few keys devoted to the 3270 functions. Also, the display was slightly non-standard, although I don't remember exactly what the resolution was. Now, the XT/370 (PC/370? AT/370) was an entirely different beast. The XT/370 had a two card set which partially implemented the S/370 instruction set (most of the user mode instructions, almost none of the supervisor mode instructions), along with 4M of virtual storage backed by 512K of real storage. According to the legends I've heard, the processor was implemented by a highly customized Motorola 68000 processor with customized microcode. The XT was required to have exactly 256K of storage (no more, no less). The 512K storage provided on the S/370 card set was mapped into the PC's address space, starting at 256K and going up to 640K. For those of you doing the address calculations, only 384K of the storage was visible in the PC's address space at any particular time, and the portion that was visible was controlled via a page mapping type of algorithm. In the XT/370, the S/370 cards required two adjacent slots, while there was usually a 3270 connection card. A hard disk controller card, along with a floppy controller card were required, too, resulting in five of the eight slots being filled. The AT/370 was a slightly different card set. The AT/370 had a bit more virtual and real storage, if my memory is correct (and, I'll admit that I'm a little fuzzy on the AT/370 since I've never had one of those, although I did and do have an XT/370). The software required for the XT/370 card was something called VM/PC, which was (loosely) based on VM/SP 3. The AT/370 card also required VM/PC, but I think it required a different version since the hardware was slightly different. (I hate to point this out, but technically the software and manuals are still copyrighted by IBM, and thus shouldn't be copied without permission.) I'm sure that there were other card sets which required multiple slots. I'm aware of the Professional Graphics Adapter which was a multiple card set. I have memories of that card set having a 80286 processor on it as a graphics controller, and, when installed in a XT, this resulted in the strange case of the display card having more processing power than the system processor, which was a 8088. Now, of course, one of the stunts that we used to pull was that we'd strip the 3270PC specific cards out of a 3270PC and convert it to a standard XT. And, of course, it's possible that any other cards could then be installed in the machine. So, it's possible that someone may have taken a 3270PC, removed the 3270PC specific cards, and then installed a XT/370 card set. This might be sort of a poetic justice, converting a 3270 display device into a S/370 system. This sounds like what may have happened to the system in question. In any case, congratuations on having your very own S/370 system; there aren't many of us who own those. :*) The XT/370 two card set did not have any I/O connectors on the back of them. The 3270PC display three card set had a video connector (CGA style?) on the center card. Both the 3270PC and the XT/370 had a 3270 coax connect card, which has a BNC connector on it. I don't remember exactly, but I think there were some restrictions on what version of DOS that the VM/PC software would work with. Maybe. I do remember installing an 80 megabyte hard disk in a XT/370, and having problems with the software not recognizing the 80M disk. I think I ended up partitioning it into three partitions to get the partitions down below 32M each. Maybe. Dave P.S. Standard Disclaimer: I work for them, but I don't speak for them. ###### From: Brian Inglis Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? Date: Thu, 14 Jun 2001 20:02:26 -0600 Organization: Systematic Software Lines: 79 Message-ID: References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> Reply-To: Brian.dot.Inglis@SystematicSw.ab.ca NNTP-Posting-Host: h-207-148-140-4.dial.cadvision.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: news3.cadvision.com 992570548 19585 207.148.140.4 (15 Jun 2001 02:02:28 GMT) X-Complaints-To: news@cadvision.com NNTP-Posting-Date: Fri, 15 Jun 2001 02:02:28 +0000 (UTC) X-Newsreader: Forte Agent 1.8/32.548 Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!news-ge.switch.ch!newsfeed00.sul.t-online.de!t-online.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.direct.ca!look.ca!west2.newsfeed.sprint-canada.net!nntp.cadvision.com!207.228.64.17.MISMATCH!not-for-mail Xref: chonsp.franklin.ch alt.folklore.computers:83731 On Wed, 13 Jun 2001 22:06 +0100 (BST), mikekingston@cix.co.uk (Michael J Kingston) wrote: >In article <%KsU6.1136$K6.60043@grover.nit.gwu.edu>, jeffreyb@gwu.edu >(Jeffrey Boulier) wrote: > >> >> Hi folks, >> >> I've just acquired an IBM 5371. It is labeled as an IBM 3270 >> Personal Computer. On the inside is a pair of joined cards, labled >> "PC/370 >> Board". Both have rows of boring chips, but the first one has two >> motorolas on it -- >> >> M 8519388 M4481512 >> XE328775 XE874743 >> CG88322BMD CC18318CMP >> SC81181R8 SC81171R >> >> Could this actually be one of the old systems that implemented a subset >> of >> the 370 architecture, and ran a "user" version of VM/CMS? >> >> Even if it isn't, more pressing question for me is "what the heck >> is the video out"? >> >> There is a DB25 connector on the back, which I think is a serial >> connector. The other candidate has 36 pins and looks reasonably unique. >> Is there any kind of adapter that would make this work with a VGA >> monitor? Do I need to hunt down another ancient IBM PC in order to get >> a monitor that would work? >> >> Yours Truly, >> Jeffrey Boulier >> >> -- >> Community Source & Support >> ------=>Prometheus<=------ >> >I used one that had so many cards that it required two system boxes. >3270PC was basically a 3278 emulator. This particular one had a plotter >attached via an IEEE bus, probably because it was installed for the person >who supported GDDM in that installation. I inherited that support >responsibility along with the machine and was fortunate in that there was >no call from users for GDDM expertise! You missed out on a lot of fun with pre-PC graphical utilities. Got to "evaluate" the suite by doing the corporate font and logo with the font and draw programs, for use on the monthly datacentre stats done with the chart program, and plotted thru a HP/GL driver (Maersk Data MD-Plot) on the desktop 8 pen sheet fed business plotter (HP7375A?) attached as a 3270 printer on RSCS (VM/HPO 5 on 4381-3?). Remember having to send set up files at plotter startup to reallocate the plotter I/O and curve short vector buffers, so instead of slow plot output sounding like dunk-screeee-dunk with default buffers, it sounded like a woodpecker on speed with its claws sliding down a blackboard. The operators hated month end stats for two reasons! >I don't remember why the machine had any attraction for me. There might be >some APL connection, though why it would have been better than a 3278, I >don't know. Needed a 3279C? with APA graphics and APL keyboard for APL development IIRC -- or maybe that was only justification for the colour screen -- mine was GDDM support ;^> Neat screen had first soft convergence controls I'd seen using the keyboard cursor keys, once you switched into setup/maintenance mode. >Mike Kingston Thanks. Take care, Brian Inglis Calgary, Alberta, Canada -- Brian.Inglis@CSi.com (Brian dot Inglis at SystematicSw dot ab dot ca) fake address use address above to reply tosspam@aol.com abuse@aol.com abuse@yahoo.com abuse@hotmail.com abuse@msn.com abuse@sprint.com abuse@earthlink.com abuse@cadvision.com abuse@ibsystems.com uce@ftc.gov spam traps ###### Sender: eric@ruckus.brouhaha.com From: Eric Smith Newsgroups: alt.folklore.computers Subject: Re: IBM 3270 Personal Computer w/ PC/370 Board? References: <%KsU6.1136$K6.60043@grover.nit.gwu.edu> <9g9cks0m2f@enews2.newsguy.com> <9gaf2c$irq$2@ausnews.austin.ibm.com> X-Disclaimer: Everything I write is false. Organization: Eric Conspiracy Secret Labs X-Eric-Conspiracy: There is no conspiracy. Date: 15 Jun 2001 15:12:37 -0700 Message-ID: Lines: 12 User-Agent: Gnus/5.0807 (Gnus v5.8.7) Emacs/20.7 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii NNTP-Posting-Host: ruckus.brouhaha.com X-Trace: 15 Jun 2001 15:32:13 -0700, ruckus.brouhaha.com Path: chonsp.franklin.ch!pfaff.ethz.ch!news-zh.switch.ch!newsfeed-zh.ip-plus.net!news.ip-plus.net!news.tesion.net!news.belwue.de!news-stu1.dfn.de!news-koe1.dfn.de!news-was.dfn.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!news-hog.berkeley.edu!ucberkeley!enews.sgi.com!news.spies.com!ruckus.brouhaha.com Xref: chonsp.franklin.ch alt.folklore.computers:83866 glass2@glass2.lexington.ibm.com writes: > Now, the XT/370 (PC/370? AT/370) was an entirely different beast. > The XT/370 had a two card set which partially implemented the S/370 > instruction set (most of the user mode instructions, almost none of > the supervisor mode instructions), along with 4M of virtual storage > backed by 512K of real storage. According to the legends I've > heard, the processor was implemented by a highly customized Motorola > 68000 processor with customized microcode. The XT was required to > have exactly 256K of storage (no more, no less). And the AT/370 required the AT to have only 512K of memory, because its window was from 512K to 640K.