test-drb June 2000

test-drb@ccmp.vtda.org

160 participants
580 discussions

wiring for MMJ cable to connect VT320 to VAX VLC

by mrbill＠mrbill.net

I need to connect a VT320 to a VAXstation 4000-VLC; anybody know the correct wiring scheme (straight-thru, twisted, null-modem?) for the MMJ cable to do so? I dont have a MMJ cable handy so I'm gonna multilate a normal phone cable and some normal RJ11 heads.... bill -- +--------------------+-------------------+ | Bill Bradford | Austin, Texas | +--------------------+-------------------+ | mrbill(a)sunhelp.org | mrbill(a)mrbill.net | +--------------------+-------------------+

26 years

Using DECmate III from terminal

by allisonp＠world.std.com

>>To do thiswould require modding the slushware so that a normal console >>requests are mapped to another port. > >Which is exactly what my suggestion to modify the address intialization >table in the ROM does. Yeah, you need to have an EPROM burner, but that >goes back to what the definition of "possible" is. Well read on. I did say that the existant trapping ports 03/04 (603x and 604x) that corospond to nominal PDP-8 console are also incomplete and cannot fall into the interrupt skip chain as a nominal TTY (m-series) module would. Sure revised slushware can fix some ills but, not all. Add to that the printer and COM ports are using devices that are also off the PDP-8 track. It really ends up that despite slushware the hardware is enough odd that standard PDP-8 code (aka OS/8 and programming handbook examples) do not work or have to be modifed from the source code side like OS/278 was. Impossible, no. Reasonable, I don't think so. I've played with the 6100 and 6120 enough to know it's just enough different from PDP-8 that it does make a difference with IO and most peripherals. Still, it's usability and perfomance as a hybrid is nothing to ignore. For those interested in programming the PDP-8 like 6120 it's a great platform to see how a simple machine is anything but. For my $.02 finding a tube (vr201 or any monochrome monitor) and a DEC keyboard are not that bug a challenge as they were widely used on rainbow, pro and terminals. Making the cable used is also not that hard. If there was any hack at all that is worth adding it's the real reset button I have on mine. Saves power cycling. Allison

26 years

In defense of NASA: was Re: Wirin' up blinkenlights

by allisonp＠world.std.com

>For anyone who misread my message and got instead that >I thought electricity had been deployed after 1928 >needs to go back to school and learn English all over >again. >> > I was aware that Toshiba was building facsimile machines in 1928 >> > in Japan, but I didn't know the ability to send an image to a remote >> > location predated the deployment of electricity. >> > >> > -dq ;) In these days of the PC retrorevionist history of computers who knew? It's the comma splice, that did it! Because of how you constructed the sentence, the date, "1928" was juxtaposed between toshiba and deployment of electricity. I hope my grammer was suitably twisted. Seriously it really wasn't clear enough that there were two distinct though realted ideas there. Allison

26 years

Texas Universites Surplus

by mrdos＠swbell.net

I just called a local (Fort Worth, Texas) University, asking about surplus property, and they said that all Texas Universities are required to turn their old computers over to the Texas Criminal Justice (or something like that) Department. Has anyone else heard of anything like this, or know why they have to do this? Does anyone in the Dallas/Fort Worth area know of any Universities that sell surplus property to the public? Thanks, Owen

26 years

In defense of NASA: was Re: Wirin' up blinkenlights

by dhquebbeman＠theestopinalgroup.com

> However, I will strongly disagree with anyone who believes we would be in > the same place technologically as we are today if there had _not_ been a > space program (regardless of the motivations for pursuing space). By and > large "mainstream" entities (ie business, banking, etc) do not "develop" > technology, they "adopt" it. This is true of computers, fax machines (which > were in vented in the 1700's BTW), and telecommunications. Without some > other force driving the creation of technology, mainstream folks don't > change their ways. I was aware that Toshiba was building facsimile machines in 1928 in Japan, but I didn't know the ability to send an image to a remote location predated the deployment of electricity. -dq

26 years

OT: Altair emulator code & C pointers

by RCini＠congressfinancial.com

Hi: I'm not particularly good at C, so I'm trying to learn more as I add tape image support to Claus Guiloi's Altair Emulator. Anyway, I have a "C pointers" question regarding copying the tape bits to the emulator memory. Here's some pseudo code... //delcared in i8080.c MEMSIZE is virtual memory size in bytes uchar Mem [MEMSIZE]; BOOL ReadTape (PSTR pstrFileName) PSTR pstrBuffer ; //buffer for fread command // make sure the file exists //allocate memory to fit tape image length and load file //determine file type (BIN or HEX) //if BIN, make sure that the image fits into the emulator memory size if (iLength > MEMSIZE){ OkMessage (hWnd, "Program too big to fit in memory!", szTitleName) ; return FALSE; } // for binary, so get load address from user and copy to memory array addr=MsgBox("Enter load address"); //obviously wrong. but it's only pseudo code // make sure that (load address + file size) <=65535 // copy binary image to the emulator memory for (i = 0; i <= iLength; i++) Mem[i+addr] = (uchar) *pstrBuffer+i; return 0; This is the important code. The Altair's memory is represented by an array of type uchar and pstrBuffer is the file buffer used int he fread command. My question is whether I'm doing the assignment right? Thanks again for the help. Rich

26 years

In defense of NASA: was Re: Wirin' up blinkenlights

by dhquebbeman＠theestopinalgroup.com

Ok, at least three people have questioned my remark, so I'd like to restate it. I was going to let it pass, but here goes. An article in an old issue of Radio Electronics, which was a construction article using surplus equipment, made the remark that fax'es weren't a new invention (new meaning 50's-60's) but that Toshiba had built and sold them in Japan since 1928. I posted this remark as a reply to someone who said that the facsimile machine had been invented in the 1700s. I found this difficult to believe as I would have thought that an electrical infrastructure would have been a necessary requirement. I was corrected on this. For anyone who misread my message and got instead that I thought electricity had been deployed after 1928 needs to go back to school and learn English all over again. Of course, if we were talking about Arkansas, I do believe the fax machine is older than Arkansas having electricty. Any Black Oak fans out there? :-) > -----Original Message----- > From: allisonp(a)world.std.com [mailto:allisonp@world.std.com] > Sent: Monday, June 12, 2000 1:33 PM > To: 'classiccmp(a)classiccmp.org' > Subject: RE: In defense of NASA: was Re: Wirin' up blinkenlights > > > > I was aware that Toshiba was building facsimile machines in 1928 > > in Japan, but I didn't know the ability to send an image to a remote > > location predated the deployment of electricity. > > > > -dq > > You can't possibly be serious. Electricity was deployed in > the late 1890s > and by 1928 fairly widely. > > Allison > >

26 years

AppleTalk on the hoof

by paulrsm＠ameritech.net

---------- > From: Cameron Kaiser <ckaiser(a)oa.ptloma.edu> > To: classiccmp(a)classiccmp.org > Subject: Re: AppleTalk on the hoof > Date: Friday, June 09, 2000 11:13 PM > > Yeah, I heard a rumour that Apple offered GS/OS there, but I don't have > any way of transferring the software (unless an Apple II meister out there > would like to explain how ...) Can today's Macs format ProDOS volumes still? > If not, does anyone have GS/OS on disk, or willing to make copies? I would > gladly reimburse any inconvenience or we could come to an equitable > understanding ... :-) The software on Apple's FTP site is all in Mac format (.HQX or MacBin). Modern Macs have a hard time creating GCR 800K disks (if they can at all). Apple has gone to the cheaper MFM-only drives which handle the 1.44MB disks well. GS/OS v6 (the latest) needs more memory than just the 1MB Apple memory card. If your IIgs only has about 1MB then do not bother with GS/OS. The previous owner may have been using them as IIe's (ProDOS 8) as I do with my IIgs. I can copy the disks for you, but you will have to send me a box of DS/DD disks as I do not wish to lose any of my little hoard. > By the way, about upgrading the SE/30. I want to upgrade the thing to > System 7.x but NOT if it will mean I can no longer run AppleShare File > Server. Can I download a System 7 friendly ASFS anywhere? This poor > thing doesn't even have MultiFinder. I do know that Apple has System 7 > for download, and I should hope a 68K version of ASFS ... ? I *think* that ASFS v2 can only run on System 6 while ASFS v3 can run on System 7. Both may take over the entire machine so using the Mac normally may be impossible. Make a backup before experimenting! My answer to the Apple II/Macintosh/MS-DOS data transfer problem is a Macintosh LC II with an Apple IIe card running System 7.1 and the extension that lets me read and write Apple II and MS-DOS disks. The extension cannot handle Win9x long file names but I do no need that. Paul R. Santa-Maria Ann Arbor, Michigan USA paulrsm(a)ameritech.net

26 years

TI Professional Computer

by Glenatacme＠aol.com

> On Fri, 9 Jun 2000, Joe Rigdon wrote: > > I picked up one of these today but some of the files on the hard drive > > are messed up. Can someone send me the Command.Com file for MS-DOS 2.11A? > > Also how do you get one of these to boot from the floppy drive and not the > > hard drive? R.D. Davis replied: > Firstly, you did test the power supply before powering the system up, > didn't you? A familiar refrain ;>) > Also, before moving the system, did you check to see if > the hard disk was the type that needed to have it's heads parked, and > if so, park them, before moving the system? Not doing that can result > in filesystem damage. Granted, this is correct on both counts: the ps needs tested before it's applied to the system, and the heads probably need to be parked before the system is moved. If I understand Mr. Davis correctly, he's suggesting that the ps be tested and possibly repaired or replaced, then the system should be booted and the heads parked, all before taking the system home. Try doing this in a surplus store. Hmm, and what happens if the ps is okay but the system won't come up? Still can't move it until you park those heads . . . Personally, I just throw caution to the winds, handle the item as carefully as possible (it's probably been kicked around for years) and take it home so I can try to figure out what it is that I'm now the Proud Owner of ;>) Glen 0/0

26 years

Mac SE computers (was Re: AppleTalk)

by SUPRDAVE＠aol.com

I have a mac plus in my collection that has something called a Hyperdrive installed in it. It's a controller card and MFM hard drive that fits behind the crt and everything actually just fits. Mine amazingly still works. Unless it was a special configuration, there was no such thing as a dual floppy SE with a hard drive. In a message dated Mon, 12 Jun 2000 12:10:15 PM Eastern Daylight Time, "Jason McBrien" <jbmcb(a)hotmail.com> writes: << They used to make internal hard drives for the Mac Plus that attached to the upper frame, to the side of the CRT. Someone probably kludged one into a SE case, not wanting to forego the all important second FD. I remember launching MacPaint on my Fatmac and having to swap out system disks ten or twelve times before I could doodle. Thank god for that external 400k drive, who would need more space? ----- Original Message ----- From: "R. D. Davis" <rdd(a)smart.net> To: <classiccmp(a)classiccmp.org> Sent: Saturday, June 10, 2000 12:40 PM Subject: Mac SE computers (was Re: AppleTalk) > > Speaking of MAC SEs, how common was it to find an SE with two floppy > drives and an internal hard drive? All of the information that I've > seen on the 'net shows that it's typical to have either two internal > floppies, or one internal floppy and one internal hard drive, but the > SE I bought a couple of weeks ago has both. > > -- > R. D. Davis > rdd(a)perqlogic.com > http://www.perqlogic.com/rdd > 410-744-4900 > > >>

26 years

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test-drb June 2000