Now I beg the question, 'What is the difference between an "emulator", and a 'simulator"?'. I always thought they were differentiated in that the emulator required a hardware feature and a simulator was all software. Is that correct?
________________________________ From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Jim Bohnsack Sent: Sunday, May 24, 2009 9:44 PM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: IBM 1401: was Re: z/VM 5.4 VSAM question - PJBR COS--that's the name I was trying to think of. I think that there was the ability to run COS under DOS also. I think I remember using some kind of DOS JCL card that set UPSI (user program switch indicators), that, I think, emulated a set of 7 or so toggle switches on the 1401. DOS/COS kind of triggers a memory. Jim John Bellomy wrote: The 360/30 had a "COS" compatibility operating system that was IPL'ed on the model 30, and then loaded a 1401 program deck. I operated this system for almost a year. It was a simulator that I used back in 1968 time frame. Then when we got a 360/65 running MVS 21.6 there was a emulator that ran as a batch job. I remember having to turn on the 1401 sense switches on the 1051 operator console via a WTOR message. -----Original Message----- =46rom: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf Of Huegel, Thomas Sent: Friday, May 22, 2009 10:16 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: IBM 1401: was Re: z/VM 5.4 VSAM question - PJBR On 360/25 there was a CSL (Control Storage Load)deck that could be loaded and then 1401 code ran 'native', no underlying DOS or OS system.=20 There was an emulator for 360/30 and 360/40 (DOS/26) we also ran 1401 programs on a 370/138. On the 138 I believe it was a simulator not an emulator .. SIM1401 or SIM1400 something like that.. =20 -----Original Message----- =46rom: The IBM z/VM Operating System on behalf of Schuh, Richard Sent: Fri 5/22/2009 11:09 AM To: IBMVM@LISTSERV.UARK.EDU Subject: Re: IBM 1401: was Re: z/VM 5.4 VSAM question - PJBR =20 The smaller systems, the 360-20 and 360-30 had a 1401 emulator mode. It was a h/w or mc based feature. I don't know whether larger machines had it. There was also a 1410 emulator mode on the -40. I do not know of any 1401 support that ran under DOS, but my DOS experience is miniscule.=20 There was a nifty package named DOS Under O/S (DUO) that allowed you to run DOS jobs under O/S MFT and VS1. It was developed by an IBM SE who lived somewhere in Texas. When IBM did not want the product, he sold it to Computer Associates (way before they changed the name to CA) where it was called CA-2 (IIRC). He died in an automobile accident not long after making the sale. Regards,=20 Richard Schuh=20 =20 -----Original Message----- From: The IBM z/VM Operating System=20 [mailto:ib...@listserv.uark.edu] On Behalf Of Tom Duerbusch Sent: Friday, May 22, 2009 8:37 AM To: IBMVM@LISTSERV.UARK.EDU Subject: IBM 1401: was Re: z/VM 5.4 VSAM question - PJBR =20 http://ed-thelen.org/1401Project/1401RestorationPage.html=20 =20 Tom Duerbusch THD Consulting =20 Jim Bohnsack <jab...@cornell.edu> <mailto:jab...@cornell.edu> 5/20/2009 8:46 PM >>> I don't remember a VM/370 1401 emulator. I supported IBM=20 customers that were running 1401 support under DOS/360, but=20 now I can't remember what it was called. It required, I=20 think, a hardware feature on the S/360-30. I think I=20 remember that there was a 1410 emulator that ran under DOS,=20 probably on a 360-40. Was there a separate VM/370 1401=20 emulator or were you just running DOS or DOS/VS under VM/370=3F =20 What was the name of that DOS 1401 emulator=3F The old core=20 memory is getting a little rusty, maybe a lot rusty. =20 Jim =20 David Boyes wrote: One shop I worked at ran the VM/370 1401 emulator for well over 20=20 years af=3D ter IBM withdrew it from marketing, faithfully paying the=20 maintenance charg=3D e year after year. It would have cost a=20 fraction of=20 that price to just rewr=3D ite the darn application, but Not=20 In My Control.... =20 -- Jim Bohnsack Cornell University (972) 596-6377 home/office (972) 342-5823 cell jab...@cornell.edu =20 "Email Firewall" made the following annotations. ------------------------------------------------------------------------ ---= --- Warning:=20 All e-mail sent to this address will be received by the corporate e-mail = system, and is subject to archival and review by someone other than the = recipient. This e-mail may contain proprietary information and is intended= = only for the use of the intended recipient(s). If the reader of this = message is not the intended recipient(s), you are notified that you have = received this message in error and that any review, dissemination, = distribution or copying of this message is strictly prohibited. If you hav= e= received this message in error, please notify the sender immediately. =20 =20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D= =3D=3D=3D -- Jim Bohnsack Cornell University (972) 596-6377 home/office (972) 342-5823 cell jab...@cornell.edu
