Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 05/04/2017 06:35 PM, Fred Cisin via cctalk wrote: > On Fri, 5 May 2017, Terry Stewart via cctalk wrote: >> Yes, reading them with IMD was one of the first things I tried. >> Couldn't >> do it at all. Tons of errors, no tracks could be read. IMD didn't >> recognise the layout at all. >> All

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 05/04/2017 09:05 PM, Terry Stewart via cctalk wrote: >> The 'RX02' format used by PUTR is actually IBM System 34 format, >> since DEC's 8" DD disks use a strange combination of SD headers >> with non-standard ID marks, and DD data fields, that can't be >> accessed with a standard PC FDC

Re: SimH IBM1130 GUI appears "fixed"

I decided to take a look at the code. The github history shows that there were no changes to any 1130-specific files between April 3, 2015 "All: Convert from C runtime library perror() to sim_perror(). . ." and May 15,2016 "All: Massive 'const' cleanup" whereas the change in behavior of the Win32

RE: Extracting files off “unknown” 8 inch disks. Any thoughts…

From: Terry Stewart Sent: Thursday, May 04, 2017 2:41 PM > Just tying up some unfinished business. Right at the beginning of this > thread I said... >> Guys in the building next door to me (a Science lab) have found some 8 inch >> floppy disks. They want to see what’s on them, or at least to

Anyone have a scan of the back cover of "UNIX System V Release 1 User's Manual" (Jan 1983)_Jan83.pdf

The scan of http://www.mirrorservice.org/sites/www.bitsavers.org/pdf/att/unix/System_V_Release_1/301-905_UNIX_System_V_Release_1_Users_Manual_Jan83.pdf has good contents, but the back cover skewed in the scanner. I picked up a copy that is missing the back cover and I want to print a replacement.

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

Yea, my setup is similar, though it goes to a USB serial on my Intel server since that was near by and handy. 9600 is totally reliable, 19200 is too flakey to use, though I'd like more speed. Then again, 310cps is about all I can do with XMODEM and 250cps with KERMIT in LCTERM. Warner On Thu,

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

I treat the few working SSQD drives I have like they're gold. The visual 1050 uses them too.

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

OK.. I will use LCTERM on my Rainbow to Kermit to my Raspberry Pi. b On Thu, May 4, 2017 at 9:58 PM, Fred Cisin via cctalk wrote: > On Thu, 4 May 2017, Warner Losh via cctalk wrote: > >> The old fashioned way: copy the files on the rainbow to the hard >> drive, kermit

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

On Thu, May 4, 2017 at 7:58 PM, Fred Cisin via cctalk wrote: > On Thu, 4 May 2017, Warner Losh via cctalk wrote: >> >> The old fashioned way: copy the files on the rainbow to the hard >> drive, kermit to my unix box. >> I have a kryoflux, but it's being nothing but

Re: Re: Extracting files off unknown 8 inch disks. Any thoughts

>First if they are DEC its one of two formats either FM aka RX01 or FM2 >aka RX02. >(..an in-depth explanation) >How do I know. I have PDP-8, PDP11 (with RX02) and VAX (qbus uVAX, >uVAX2000, and 3100 family). >I used to and still do exchange between RT-11 and CP/M using RX01 mode >and a CP/M

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

On Thu, 4 May 2017, Warner Losh via cctalk wrote: The old fashioned way: copy the files on the rainbow to the hard drive, kermit to my unix box. I have a kryoflux, but it's being nothing but frustrating to me since I don't know if I have a known good floppy it supports or not. I mean I have two

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

The old fashioned way: copy the files on the rainbow to the hard drive, kermit to my unix box. I have a kryoflux, but it's being nothing but frustrating to me since I don't know if I have a known good floppy it supports or not. I mean I have two 5.25 1.2M floppy drives, just have no way of

Re: Windows 1.0 For DEC Rainbow (mirror of Latrobe ftp anybody ?)

Warner, How are you uploading and downloading disks from the Rainbow...via the Rainbow or by reading the disks using an image program? I grabbed a copy of Windows. I may have a spare graphics card. Bill On Mon, May 1, 2017 at 11:20 PM, Warner Losh via cctalk < cctalk@classiccmp.org> wrote: >

Re: Re: Extracting files off unknown 8 inch disks. Any thoughts

Thank you! Now, the question will be whether Allison has some free time to check them out for Terry. Experience always beats speculation: On Thu, 4 May 2017, allison wrote: First if they are DEC its one of two formats either FM aka RX01 or FM2 aka RX02. RX01 base format is 128byte sectors

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>The 'RX02' format used by PUTR is actually IBM System 34 format, >since DEC's 8" DD disks use a strange combination of SD headers >with non-standard ID marks, and DD data fields, that can't be >accessed with a standard PC FDC regardless of the software used." Right. It's definitely a

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 5/4/2017 6:39 PM, Terry Stewart via cctalk wrote: And yet, if there were an RX02 somewhere on this VAX, I don't believe you'd be able to read them at all... RX02 seeming more likely with a VAX. Interestingly PUTR, does seem to accommodate this, and the kind of system I have set up (i.e.

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>If it's an RX02 operating in double-density mode, you're not going to >read the disks with any commodity floppy controller. You will, however, >get the sector ID headers. >DEC used a rather peculiar scheme where headers were recording in >single-density (FM), but the body of the sector (the

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 05/04/2017 04:30 PM, js--- via cctalk wrote: > On 5/4/2017 6:16 PM, Terry Stewart via cctalk wrote: >>> If these are from a VAX, could they be microcode disks for a >>> 11/780? >> There was a RX01 attached via a LSI-11 as console. > > And yet, if there were an RX02 somewhere on this VAX, I

Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On May 4, 2017 3:30 PM, "Terry Stewart via cctalk" wrote: >Using IMD, or other tools, can you determine the density, bytes per sector, and sectors per track of the disks (try at least 2) >Also, is the data recorded single sided, or both sides? >If you can read it with

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>And yet, if there were an RX02 somewhere on this VAX, I don't believe you'd be able to read them at all... RX02 seeming more likely with a VAX. Interestingly PUTR, does seem to accommodate this, and the kind of system I have set up (i.e. 1.2 MB 5.25 inch in CMOS even though it's an 8 inch

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On 5/4/2017 6:16 PM, Terry Stewart via cctalk wrote: If these are from a VAX, could they be microcode disks for a 11/780? There was a RX01 attached via a LSI-11 as console. And yet, if there were an RX02 somewhere on this VAX, I don't believe you'd be able to read them at all... RX02

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>If these are from a VAX, could they be microcode disks for a 11/780? There was a RX01 attached via a LSI-11 as console. >Or they could just be disks used for data exchange. They would be in another DEC OS file format, rather than ODS2. Thanks Jerry, No one actually knows. Attached to the

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

If these are from a VAX, could they be microcode disks for a 11/780? There was a RX01 attached via a LSI-11 as console. Or they could just be disks used for data exchange. They would be in another DEC OS file format, rather than ODS2. Jerry Weiss j...@ieee.org > On May 4, 2017, at 4:41

Re:sks. Any thoughts

Does your system handle single density? (some FDCs do; some don't) On Fri, 5 May 2017, Terry Stewart via cctalk wrote: Oh, yes it does. Well, there went THAT hope. There exist other encoding formats, besides WD/IBM style FM and MFM. (GCR, MMFM, and dozens of others) If IMD (which seems

Re: Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>Is your 8 inch setup capable of FM/single density? >I think that Dave has a utility to test that. Yes, quite capable. It passes Dave's test and I have read/written in single density when archiving other stuff. Archiving my FM/single density POLY and Panasonic stuff was no problem.

Re: Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On Fri, 5 May 2017, Terry Stewart via cctalk wrote: Yes, reading them with IMD was one of the first things I tried. Couldn't do it at all. Tons of errors, no tracks could be read. IMD didn't recognise the layout at all. All the disks I tried were like this. Then, either it is impossible to

Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>Does your system handle single density? (some FDCs do; some don't) Oh, yes it does.

Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

>Using IMD, or other tools, can you determine the density, bytes per sector, and sectors per track of the disks (try at least 2) >Also, is the data recorded single sided, or both sides? >If you can read it with IMD, then you can start wading through content within sectors to get more clues about

Re: Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

On Fri, 5 May 2017, Terry Stewart via cctalk wrote: They may be CP/M, or some other format entirely. It turns out these disks are from a VAX machine. Assuming the OS is VMS, I scoured the Internet for something that might read them. I don't know anything.but, I will point out a few things

Re: Extracting files off “unknown” 8 inch disks. Any thoughts…

Hi guys, Just tying up some unfinished business. Right at the beginning of this thread I said... >Guys in the building next door to me (a Science lab) have found some 8 inch floppy disks. >They want to see what’s on them, or at least to archive them. >They have no idea what machine these disks

Re: SimH IBM1130 GUI appears broken

I wrote, last night: > In case anybody here is interested, I've discovered a > satisfactory (to me, at least) resolution to this problem. > > I downloaded Carl Claunch's DMS disk (dms32k25011403.dsk) > from bitsavers.org. . . > > Using this DMS disk (and with the appropriate changes to

Re: Reviving VT220?

I am taking another look at this. In this VT220 there is a "Billion" transformer attached to the side which gives AC to the board via a two pin connector. My multimeter (which is supposedly true RMS) tells me that there is 246v going into the transformer (fine, I'm in the UK) and 40v coming out.

Re: Ohio Scientific Universal RAM Board GW-OSI-RAM1

On 05/03/2017 05:37 PM, Systems Glitch wrote: > I want to say the only 12-bit work I've done has always been octal > (PDP-8), but 8- and 16-bit has been a mix. I can switch between them, > but it's kinda like using vim and $graphical_work_editor -- you use > vim on a weekend long hack session and

Re: VCF SE Photos

> > Bill, > > The picture entitled Owen_HP-2116C.jpg is Jim Mahaffey's homebuilt > 6100-based PDP-8 clone. I didn't end up displaying the 2116C after all. > > Thanks! > > Kyle Ah. It did not look like an HP, but I figured it was a modified under the hood version somehow, thanks B

Re: IBM 4331 Mainframe 3 phase converter

> On May 4, 2017, at 11:54 AM, Jon Elson via cctalk > wrote: > > ... But, you DO need a true sine wave source, and VFDs do not produce sine > waves, they put out 400 V PWM waveforms that look fine to a motor, but not > good at all to electronic loads. I wonder how

Re: IBM 4331 Mainframe 3 phase converter

> On May 4, 2017, at 8:59 AM, Jon Elson wrote: > > On 05/04/2017 10:36 AM, Guy Sotomayor Jr via cctalk wrote: >>> >> OK, that’s not helping. Here’s what I have (from IBM site planning docs >> GC22-7064-10 and GC22-7069-2): >> 3340-A2 DASD: 2.2 kVA 3-phase >> 3340-B2

Re: IBM 4331 Mainframe 3 phase converter

kVA is simply kilovolts times amps. It is roughly a synonym for kW, except that it probably ignores the phase angle. So for resistive loads, kVA == kW but for inductive or capacitive loads, kVA would be larger. 1 hp == 746 W. But when people talk about phase converter hp limits, they are

Re: IBM 4331 Mainframe 3 phase converter

On 05/04/2017 10:36 AM, Guy Sotomayor Jr via cctalk wrote: On May 4, 2017, at 8:04 AM, jim stephens via cctalk wrote: On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote: Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s docs all

Re: IBM 4331 Mainframe 3 phase converter

On 05/04/2017 09:36 AM, Guy Sotomayor Jr via cctalk wrote: Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s docs all specify power in KVa and most of the 3 phase converters (other than what Bob posted) seem to specify HP. If I’m going to spend serious coin on a

Re: IBM 4331 Mainframe 3 phase converter

> On May 4, 2017, at 8:04 AM, jim stephens via cctalk > wrote: > > > > On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote: >> Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? >> IBM’s docs all specify power in KVa and most of the 3 phase

Re: IBM 4331 Mainframe 3 phase converter

On 5/4/2017 7:36 AM, Guy Sotomayor Jr via cctalk wrote: Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s docs all specify power in KVa and most of the 3 phase converters (other than what Bob posted) seem to specify HP. If I’m going to spend serious coin on a

Re: IBM 4331 Mainframe 3 phase converter

Does anyone know how to convert KVa to 208v 3-phase currents and/or HP? IBM’s docs all specify power in KVa and most of the 3 phase converters (other than what Bob posted) seem to specify HP. If I’m going to spend serious coin on a phase converter (I think I found it online for ~$3k…ouch!), I

Re: VCF SE Photos

On May 4, 2017 7:45 AM, "william degnan via cctalk" wrote: I have updated the thread to address comments. I also assigned Alan Hightower to the Tandy exhibit, I had it marked as "whoseisthis.jpg". Thread: http://vintagecomputer.net/browse_thread.cfm?id=677 Alan

Re: VCF SE Photos

I have updated the thread to address comments. I also assigned Alan Hightower to the Tandy exhibit, I had it marked as "whoseisthis.jpg". Thread: http://vintagecomputer.net/browse_thread.cfm?id=677 Alan Hightower's exhibit http://vintagecomputer.net/vcfse-5/Hightower_Tandy.jpg Directly to the

Re:VCF SE Photos

I will update the reference about the event sponsor etc. As far as the Robot pic goes, there are more photos of evan's exhibit, link at thr bottom. Bill Degnan twitter: billdeg vintagecomputer.net On May 4, 2017 1:20 AM, "Earl Baugh via cctalk" wrote: > > Date: Wed, 3

Re: IBM 4331 Mainframe 3 phase converter

Bob, Thanks, that looks just about perfect. Solid state, true sinusoid 3 phase, 30A continuous but can do 140A for 4 seconds - seems made to power a big bunch of vacuum column tapes. Marc From: cctalk on behalf of "cctalk@classiccmp.org"