[cctalk] Re: 50 pins in three rows

On Sat, 12 Aug 2023, Chuck Guzis via cctalk wrote: > > They are: . > > People never give up on these things as this is not the first reference I > > have come across in the recent years about this connector being made new. > > I

[cctalk] Re: 50 pins in three rows

On Fri, 11 Aug 2023, Fred Cisin via cctalk wrote: > I just called them D-23, since the shell size didn't seemto have been > named/defined. > > They weren't available when i got my Amiga, either. > But, I guess that there was a period in between when they might have been > available. They are:

[cctalk] Re: Is this a RIFA (uV3100-10 PSU)?

On Wed, 2 Nov 2022, Peter Coghlan via cctalk wrote: > > Did you have to replace the power LED at all? I've just bench-tested the PSU > > I've swapped the X2 cap in (luckily it powers up without a load, so all I > > did was hook up a DVM and check out the voltages), and I noticed that the > > LED

[cctalk] Re: DECnet to be dropped from Linux

On Tue, 2 Aug 2022, Wayne S via cctalk wrote: > I naively assume that since Decnet is a mature product supporting it > just means testing it with new versions of Linux so not too much work is > needed. Someone has to do that, it doesn't happen automagically. And if not for: > It has been

[cctalk] Re: Agenda VR3 MIPS cross-gcc

On Sat, 30 Jul 2022, Tomasz Rola via cctalk wrote: > suppose). Is there anything that indexes ftp sites, beyond, hum-hum, > archie? Is there any archie server left? Yep, . Maciej

RE: DEC H7822 power supply

On Thu, 12 May 2022, Peter Coghlan via cctalk wrote: > > Wayne: I just got an Dec AlphaStation 200. Look like its running NT > > though. > > > > It's probably ok but check the power supply for leaky capacitors! Definitely, watch out for possible damage! Prompted I had a peek in mine (an

Re: DEC H7822 power supply

On Thu, 12 May 2022, Peter Coghlan via cctalk wrote: > I replaced the capacitor in question with a blue Nichicon SE of the same > value scavanged from another H7821 until I order some spares. I now have > 8.7V available on the 9V supply, a little less than I hoped for but it is > enough to make

Re: DEC H7822 power supply

On Wed, 11 May 2022, Paul Koning wrote: > > I guess especially for standard capacitors factories ordered whatever was > > readily available whereas with the high-ripple low-impedance/ESR parts the > > choice was much more limited. > > I wonder if nowadays a good replacement for the case where

Re: DEC H7822 power supply

On Thu, 12 May 2022, Peter Coghlan via cctalk wrote: > Anyway, the good news is that I think I have found the source of the > problem. One of the capacitors used to filter the (DC?, pulsed DC?, > rippled DC?, biased AC?) supply to the 9V regulator is marked 330uF/25V. > It reads 6uF on the

Re: DEC H7822 power supply

On Sun, 8 May 2022, Tony Duell wrote: > > In the H7821 it's -9Vdc return pairing with -9Vdc supplied on the yellow > > wire (an isolated circuit). Pin numbers 14 & 13. Try measuring voltage > > across the suspicious connections as any reference to ground may not be > > indicative. > > > >

Re: DEC H7822 power supply

Hi Peter, > > Right, my notes indicate Nichicon PL parts might be problematic too, e.g. > > one at 4700uF/10V on 5V output of the H7826 PSU. > > > > What is H7826 used in? I don't think I have any of those. DECstation 5000/1xx systems and TURBOchannel Extender boxes. Not sure if anything

Re: DEC H7822 power supply

Hi Peter, > I still have the leaky electrolytics I removed from the POWER-ONE PSU in my > Cisco IGS a while back. I stored them with their leads up and goo seems to > be still oozing out of some of them despite their inactivity and orientation. > These ones are marked Nichicon PL(M) 4700uF/63V,

Re: DEC H7822 power supply

On Tue, 3 May 2022, Peter Coghlan via cctalk wrote: > > Would the system have been possibly stored upside down sometime? > > > > I don't think so. It may have spent some time lying on it's side due to > deteriorating rubber feet and for ease of access and but I can't see any > reason for it

Re: DEC H7822 power supply

On Mon, 2 May 2022, Peter Coghlan via cctalk wrote: > Thankfully, it doesn't seem to have been there long and didn't get a chance > to spread around the board. Bizarrely this capacitor has it's legs pointing > upwards and managed to leak while there are similar capacitors on the other > board

Re: PCI floppy controller

On Thu, 21 Apr 2022, Chuck Guzis via cctalk wrote: > I suppose it might be possible to fashion a legacy floppy controller on > a PCI card with enough supporting logic to make it compatible with > existing software, but I'm not aware of such an effort. You can of course build a PCI FDD interface

Re: Retro networking / WAN communities

On Mon, 11 Apr 2022, Grant Taylor via cctalk wrote: > > I think "hub" is another word for "repeater" (just like "switch" is another > > word for "bridge"). > > Interesting. > > Do you know of any documentation, preferably not marketing materials, that > used "repeater" in lieu of "hub"? As I

Re: VAX9000 unearthed

On Fri, 18 Feb 2022, Paul Koning via cctalk wrote: > From what was just reported, the 6000 series indeed did it that way. > But I think on the 9000 it was an I/O bus too. I definitely remember > some work on XMI based I/O devices, in particular an FDDI card. And > indeed you can find a spec

Re: More switchmode power supply grief - Cisco IGS router

On Sun, 6 Feb 2022, Peter Coghlan via cctalk wrote: > > NB Mouser has the MAP80-4000G in stock actually, so if all else fails and > > you are determined to get the IGS running, you can pick a brand new one: > > . > > > > Thanks again

Re: Wanted: Pinout IDT 49C402 PGA84

On Thu, 10 Feb 2022, Holm Tiffe via cctalk wrote: > Has anyone a databook newer than 1989 where the PGA84 Pinout is listed? It seems like datasheetarchive.com has a copy of a 1995 datasheet listing what you need ("IDT49C402/A/B 16-BIT CMOS Microprocessor Slice", IDT doc #9011; original, not

Re: More switchmode power supply grief - Cisco IGS router

On Sat, 5 Feb 2022, Peter Coghlan via cctalk wrote: > > This PSU seems to have been used across various Cisco devices and I had > > one fail several years ago in a WS-C1202 Ethernet/FDDI switch, also having > > suffered from leaking caps. Back then RS still had it in stock at a hefty > >

Re: More switchmode power supply grief - Cisco IGS router

On Thu, 3 Feb 2022, Peter Coghlan via cctalk wrote: > Today I finally managed to check it out. The ceramic F4A mains input fuse > beside the power switch on the back panel had blown. When I opened it up, > I found a POWER-ONE MAP80-4000 power supply. The main chopper transistor > labelled Q1

Re: Origin of "partition" in storage devices

On Tue, 1 Feb 2022, Liam Proven via cctalk wrote: > One of our favourite small PC builders, Panrix, questioned this. They > reckoned that having the swap file on the outer, longer tracks of the > drive made it slower, due to slower access times and slower transfer > speeds. They were adamant.

Re: Origin of "partition" in storage devices

On Mon, 31 Jan 2022, Fred Cisin via cctalk wrote: > File sizes were stored as the last 4 bytes of each DIRectory entry, with a > signed 32 bit number. So, a file could be from > -2,147,483,648 to 2,147,483,647 > Unfortunately, they never successfully finished the implementation, so copying > a

Re: DEC 3000/600 Alphaserver problems

On Wed, 12 Jan 2022, Jon Elson via cctalk wrote: > > Thanks Jon. > > > > Here is a badly focused picture of the suspect components: > > > > http://www.beyondthepale.ie/cctech/p1010198.jpg > > WOW, I don't know what those are!  They look like big ceramic caps to me, but > if they don't have any

Re: Mounting ULTRIX CDROMs on Linux

On Fri, 21 May 2021, Maciej W. Rozycki wrote: > ISTR upstreaming some fixes to Linux UFS support 20+ years ago to address > this very problem (IIRC OSF/1 or Digital Unix CD-ROMs were also UFS, and I > had a need to access them under Linux for some reason) and with them in > place I thought

Re: PCIe/PCI I/O access (was: Re: VT340 Emulation)

On Sun, 27 Jun 2021, Kevin Bowling wrote: > Thanks this was interesting learning. You are welcome! NB I think it is also worth noting that the presence of I/O instructions and corresponding bus cycles with x86 is most relevant for PCI as it is only *because* x86, or more importantly the

PCIe/PCI I/O access (was: Re: VT340 Emulation)

On Sun, 27 Jun 2021, Paul Koning wrote: > > However both serial and parallel ports remain reasonably available as > > PCIe option devices. Though parallel ports seem to be made as legacy PCIe > > devices only, that is accessed with I/O rather than memory read/write bus > > cycles, which are

Re: VT340 Emulation

On Fri, 25 Jun 2021, Paul Koning via cctalk wrote: > > Well you can find mother boards with real COM port, but they are rare. > > One place you can find them easily is on industrial computers. My > firewall machine is one, because I wanted it to be fanless. It has the > usual pile of USB

Re: Mounting ULTRIX CDROMs on Linux

On Thu, 20 May 2021, Christian Groessler via cctalk wrote: > IIRC I had burned the Ultrix CD "normally" (means without fiddling with block > size, so not 512), but changed the block size to 512 for booting it. IIRC #2, > burning was done on another drive, not the Plextor. CD-ROM medium format

Re: Melted computer feet

On Wed, 19 May 2021, Zane Healy via cctalk wrote: > I’m trying to determine if I can revive the VAXstation 4000/90 I > received from a list member, back around 1998 (it’s never worked). > When I pulled it out, I discovered that its feet have melted, and I’m > assuming probably made a mess on

Re: That VAXStation4000vlc 3W3 video connector

On Tue, 4 May 2021, Jonathan Stone via cctech wrote: > You need a video cable with a 3W3 connector on one end. Original was likely > a DEC BC29G-10. > That, plus 5BNC-to-VGA cables, and 3 F/F BNC barrels, will work with a > multisync monitor that handles sync-on-green. > > I just went through

Re: OT: Newsreader for Windows

On Thu, 1 Apr 2021, Grant Taylor via cctalk wrote: > There is probably also the option of using the TUI news readers in / via > Windows Services for Linux (?is that the proper name for /today/?). I have never used that port myself, but there's PC-Alpine worth considering, which I believe uses

RE: VAXstation 2000 network & hardware guides (English & German)

On Sat, 20 Mar 2021, Dave Wade G4UGM via cctalk wrote: > These arrived this morning and they are scanned and OCR'd here:- > > https://1drv.ms/u/s!Ag4BJfE5B3onlY9td7hHhHPnUKV2bA?e=hDKwES > > I think I can scan at lower resolution and/or grey scale as these are a > bit on the huge side

Re: 80286 Protected Mode Test

On Sun, 14 Mar 2021, Liam Proven via cctalk wrote: > > I should also note, that the other way to get back to real mode from > > protected mode is via a triple-fault. What gets me (and I railed on > > Intel when I worked there for a time) that it still existing in the > > architecture even though

Re: 80286 Protected Mode Test

On Sun, 7 Mar 2021, Noel Chiappa via cctalk wrote: > > The 286 can exit protected mode with the LOADALL instruction. > > Really? So why all the hullabaloo about Triple Faults: > > http://www.rcollins.org/Productivity/TripleFault.html > > back in the day; and why did IBM set up the

Re: Intel Developers' Insight CD-ROM collection archived anywhere?

On Thu, 1 Oct 2020, Glen Slick via cctalk wrote: > > Sadly neither seems to be among the files I have copied. I could yet > > check Intel Dec 1995 Data on Demand discs I happen to have, and do have > > here, but they are cumbersome to handle as they use a proprietary format > > requiring a DOS

Re: Atari ST diskettes

On Wed, 2 Dec 2020, Liam Proven via cctalk wrote: > If you don't get much response here, for many of whom I suspect the ST > is a bit modern, let me know and I can share it on some relevant > groups on FB for you. Anonymised or obscured as you prefer. Well, I guess for some anything that does

Re: The best hard drives??

On Fri, 20 Nov 2020, Peter Corlett via cctalk wrote: > That same $100 widget imported into the UK becomes $120 due to the 20% VAT > rate, which comes to £90, but the UK has its own self-inflicted problems which > cause importers loads of extra costs and £100 is easily believable. Don't forget a

Re: WTB: AUI cables

On Tue, 17 Nov 2020, Grant Taylor via cctalk wrote: > > Those seem rather high priced to me. > > Ya. They are actually (just barely) higher than I can find them on eBay > ($20). > > Maybe I'm being a cheapskate. I like the $5 price a lot better. I think > that's much closer to what I paid at

Re: WTB: AUI cables

On Tue, 17 Nov 2020, Paul Koning via cctalk wrote: > One is from Black Box, at an insane price, with actual AUI style (slide > lock) connectors. > > There are several others that are much less expensive, with regular > screw lock DA-15 connectors. And of course cables with those connectors >

Re: FYI sunhelp.org down

On Wed, 14 Oct 2020, Grant Taylor via cctalk wrote: > > I suppose the list server relies on the same nameservers in a way that > > prevents e-mail distribution from happening. > > I don't think so. At least I thought that the hot wiring that I did to my > mail server only effected /sending/ of

Re: non-shunting jumpers?

On Thu, 22 Oct 2020, Wayne S wrote: > I’ve just stripped off a short piece of insulation from hookup wire and > slipped it over the pin.Fits tight and can be removed and it's cheap. I guess it's as cheap as you can get. :) Maciej

Re: non-shunting jumpers?

On Thu, 22 Oct 2020, Chuck Guzis via cctalk wrote: > > A variation on the connector idea: use an insulation-displacement type > > connector (the kind that you mount onto a flat cable assembly) without > > the cable. Just snap on the cover over the i-d pins and you have a > > fully insulated

Re: FYI sunhelp.org down

On Wed, 14 Oct 2020, Grant Taylor via cctalk wrote: > > I posted to and saw my message got stuck in the mail > > queue. > > When did you send your message? I'm trying to judge when the problem started. Last Mon, Oct 12th. The last message I received from the mailing list was on Oct 1st.

Re: FYI sunhelp.org down

On Wed, 14 Oct 2020, Diane Bruce wrote: > He was an old friend of mine he died August 15 2019 of cancer. :-( > https://www.gray329.org/bro-william-c-bradford-1974-2019/ So sorry to hear that. :( Maciej

FYI sunhelp.org down

Hi, I posted to and saw my message got stuck in the mail queue. Upon a further inspection I saw that the domain has expired along with `mrbill.net' where the nameservers used to reside and both have been taken by someone else, taking the name service down for `sunhelp.org'. I can still

Re: Remote job submission from PDP-11

On Wed, 7 Oct 2020, Al Kossow via cctalk wrote: > > Synchronous serial lines are not typically a feature in the sort of > > machines people are likely to be running something like Simh on, > > especially laptops. I'm sure there were Sync serial cards for ISA but > > probably not anything more

Re: Intel Developers' Insight CD-ROM collection archived anywhere?

On Thu, 1 Oct 2020, Maciej W. Rozycki wrote: > > As one example of something that I was recently unable to find online > > anywhere is a copy of either of these, which might have been available > > on some of the Intel Developers' Insight CD-ROMs: > > 297372 16-Mbit Flash Product Family User’s

Re: Intel Developers' Insight CD-ROM collection archived anywhere?

On Wed, 30 Sep 2020, Glen Slick via cctalk wrote: > Does anyone have a collection of Intel Developers' Insight CD-ROMs in > physical form or as images? The only physical CD-ROMs I have are a two > disk set from February 1998. I don't know what time period these were > available. Maybe mid or late

Re: Sun SPARCstation LX boot from CDROM?

On Tue, 1 Sep 2020, Liam Proven via cctalk wrote: > This and the rest of what you describe sounds quite like the damaged > caused by electrolyte leaking from failed capacitors. This is probably > the most common cause of failure in electronics after they get to 2-3 > decades old. > > There was

Re: About to dump a bunch of Compaq SCSI disk caddies (and disks)

On Wed, 8 Jul 2020, Peter Corlett via cctalk wrote: > > If I needed one of those drives, I'd be willing to pay $1 / GB plus shipping > > and handling if they were known to be good. (If I needed them) I would buy > > them sight unseen if you ran SpinRite level 2 on the drives and said they > >

RE: IDE-SD adapter question

Eugene, > Jonas, I am using an SD card, not CF because I need to move files from a > laptop to this computer using the SD. Having said that, I suspect > everything you said is still true. I don't have access to any linux. But > do you think I could make a 300MB partition (for example) on the

RE: IDE-SD adapter question

On Sat, 27 Jun 2020, W2HX via cctech wrote: > Peter and Maciej. Thank you very much for the input. I don't believe > this BIOS supports anything other than CHS. At least I don't see a way > to toggle between CHS and LBA. Is this what I should be looking for? An > option to enable LBA mode?

Re: IDE-SD adapter question

On Fri, 26 Jun 2020, W2HX via cctech wrote: > Thanks for previous help on this project. I am working on an old 486 > computer and I have replaced a 40 pin IDE hard drive with this SD > adapter... > https://www.amazon.com/gp/product/B07G29TZPS/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8=1 There

RE: IDE-SD adapter question

On Sat, 27 Jun 2020, W2HX via cctech wrote: > Could it be related to the fact that it is a 2GB SD card and I believe > IDE controllers of that day could only address something like 500MB? Except for a few sophisticated caching host bus adapters and ATA RAID controllers that presented their

Re: Future of cctalk/cctech (comment on address fields) , capturing Discord server traffi

On Thu, 25 Jun 2020, jim stephens via cctalk wrote: > I have an observation for when the list migrates.  The current message "From" > field contains the name of the original sender but with the encoded address of > the list as the email address > > For example this has > > Al Kossow via cctalk

Re: Future of cctalk/cctech

On Fri, 19 Jun 2020, Patrick Finnegan via cctalk wrote: > > Sure, there's always `uuencode' when you do need to post that non-text > > piece (which I guess will keep the eyes of Luddites away from it too). > > > > Or an http, https, ftp, or gopher url to somewhere else hosting the image. Well,

Re: Future of cctalk/cctech

On Fri, 19 Jun 2020, Peter Corlett via cctalk wrote: > > It's time to adopt a platform that can handle modern mail. Some may still > > choose a degraded experience, but everyone is entitled to their own fetish. > > Any old mail client can read "modern mail": MIME is designed to be >

Re: Synchronous serial Re: E-Mail Formats RE: Future of cctalk/cctech

On Thu, 18 Jun 2020, Peter Coghlan via cctalk wrote: > However, Peter uses PMDF MAIL to post to the list because it has been > pointed out to him that VMS MAIL doesn't do References: and In-Reply-To: > headers correctly. On that note, has anyone heard from Mouse? I haven't > seen anything

Re: Amiga Vendors?

On Thu, 18 Jun 2020, Peter Corlett via cctalk wrote: > DB-23 to SCART cables were (and still are) readily-available from anywhere > that > has anything to do with the Amiga. Sometimes they had sawn-down DB-25 plugs > since DB-23 wasn't exactly a common connector even in the Amiga's heyday.

Re: Microsoft open sources GWBASIC

On Thu, 11 Jun 2020, Maciej W. Rozycki wrote: > GCC supports legacy Fortran code, so I have filed PR fortran/95631 to > track this bug, at: . > Let's see what emerges. So the response from GCC Fortran experts is as follows: "[...] Yes,

Re: Microsoft open sources GWBASIC

On Sun, 31 May 2020, Eric Korpela via cctalk wrote: > C > C CHANGE THE VALUE OF 4 > C > > CALL INC(4) > WRITE (*, 30) 4 > 30FORMAT ('2+2=',I4) > END > > SUBROUTINE INC(I) > I = I + 1 > END > > OUTPUT > 2+2= 5 Hmm, as a matter of interest

Re: PDP-8/A transformer hum

On Tue, 9 Jun 2020, Bill Gunshannon via cctalk wrote: > > For the VXT-2000 with an H7109-B the rated voltage and current values > > are printed right on the power supply label: > > > > +5.1V, 7.81A > > +12.1V, 0.62A > > -12.1V, 0.46A > > -9V, 0.2A > > > > Fixed width character pinout diagram: >

Re: 2.11bsd unix resolver

On Thu, 21 May 2020, Richard Sheppard via cctalk wrote: > On Solaris it’s the “hosts” line in the /etc/nsswitch.conf/ file. Having /etc/nsswitch.conf was actually Solaris's invention and Solaris itself came from System V rather than BSD. It was only adopted by the freely available *BSD

Re: LK201 emulation

On Sun, 17 May 2020, emanuel stiebler via cctalk wrote: > Actually, would even like the other way around too, connecting a working > lk201 to a pc ... ( so the terminal emulation works nicer) Well, you just need a serial port adapter + power. See also:

RE: Replacing Power LED on MicroVAX 3100/95 Power Supply

On Wed, 13 May 2020, Rob Jarratt wrote: > That's fantastic Maciej! I often buy from Farnell, so there is no issue with > getting those parts myself. When I have accumulated enough wants to warrant > an order I will get them. You are welcome, I'm glad to be of help! Maciej

Re: Replacing Power LED on MicroVAX 3100/95 Power Supply

On Sun, 10 May 2020, Peter Coghlan via cctalk wrote: > > I seem to remember people saying it is quite difficult to replace these, > > mainly because you can't get them out without breaking the holder. Is that > > right? Has anyone done this successfully and have any tips? > > Is this the green

Re: Identifying Machine for DEC Memory

On Wed, 1 Apr 2020, Antonio Carlini via cctalk wrote: > I did have a quick hunt on the net for IPBs for any of these systems, but with > no luck. manx shows a few service manuals but they had the MS4x numbers. The look does match MS01-AA though as shown in Figure 5-9 on page 5-16 of

Re: Identifying Machine for DEC Memory

On Wed, 1 Apr 2020, Liam Proven via cctalk wrote: > The -12 on the chip part number implies 120ns RAM to me. That is slow > by modern standards -- before EDO came in, PCs tended to take 70ns, > 80ns was slow and 60ns was fast. 120ns would be quick enough for a > 4000/60 or 4000/90, marginal for a

RE: H7874 power supply

On Sun, 29 Mar 2020, Robert Armstrong via cctech wrote: > And then there's a giant PCB, almost 11" square, covered with opamps, 74LS > logic and discrete parts. There are filter caps, a transformer, and > switching transistors on this board too so it obviously produces yet another > power

Re: Vaxstation 400/90 power supply

On Wed, 25 Mar 2020, Matt Burke via cctalk wrote: > > no, no confusion, and thanks for the detailed analysis. Now I have to > > find my dremel (I just moved) and check the Dallas NVRAM ;-) > > > > Cheers & thanks again! > > You can buy replacements for the Dallas DS1287A under a new part number

Re: Vaxstation 400/90 power supply

On Mon, 23 Mar 2020, Brent Hilpert via cctalk wrote: > > I have 4000/90 which behaves funny. It only starts, after switching on > > twice. The first time, all LEDs stay on, flipping the switch off/on, it > > boots happily. [...] > I've experienced behaviour like this in an Apple-something. > It

Re: HPE OpenVMS Hobbyist license program is closing

On Sat, 21 Mar 2020, Jan-Benedict Glaw wrote: > > Not a question for me, but for the record I have used a WTI remote site > > manager, essentially a combined power distribution and terminal server > > unit, for 5 years now. > > That's this product line, itn's it? > >

RE: HPE OpenVMS Hobbyist license program is closing

On Fri, 20 Mar 2020, Rob Jarratt wrote: > > Actually, I'm searching (more active than ever) for a proper location to > > put all > > of my hardware to. I already have shelves, controllable power plugs, and > > just > > today an EPROM reader/writer arrived. Though I'm unsure (to use fair > >

Re: soviet resistor identification help and maybe lamps?

On Sun, 8 Mar 2020, Curious Marc via cctech wrote: > On the Russian resistors I saw, the value was what is written on it. If > you can’t measure them, maybe there is some conformal coating or > corrosion on the leads? You’d need to scratch that off. At least in the 1980s they used R, K or M

Re: HPE OpenVMS Hobbyist license program is closing

On Tue, 10 Mar 2020, Jan-Benedict Glaw via cctalk wrote: > > Linux and/or NetBSD/vax would be a good choice, though, to implement the > > VAX's system calls and execute it's binaries. Though there were more > > concerted efforts to do this years ago, but I don't know what became of > > them.

Re: H7821 power supply in MicroVAX 3100, SCSI disk enclosures and others

On Fri, 31 Jan 2020, Peter Coghlan via cctalk wrote: > If anyone has anything with H7821 power supplies in them, I suggest checking > on these capacitors. If anything with these power supplies is in storage, I > suggest ensuring it is stored the normal way up as this should limit the > ability

Re: Fwd: VAX + Spectre

On Thu, 3 Oct 2019, Maciej W. Rozycki wrote: > > You need an extremely high resolution timer to detect slight differences in > > execution time of speculatively-executed threads. The VAX 11/780 certainly > > did > > not do speculative execution, and my guess is that all VAXen did not, > >

Re: Fwd: VAX + Spectre

On Tue, 17 Sep 2019, Jon Elson via cctalk wrote: > > "Spectre" is one of two notorious bugs of modern CPUs involving speculative > > execution. I rather doubt that VAX is affected by this but I suspect others > > here have a lot more knowledge. > > > > > You need an extremely high resolution

Re: RS2030 MIPS workstation

On Tue, 2 Jul 2019, Patrick Mackinlay via cctalk wrote: > For the MIPS Rx3230 systems, which use an M48T02, the mac address should > be in the first 6 bytes of NVRAM. You can read/write the NVRAM through > the boot monitor using the “g” (get) and “p” (put) commands. You also > need to provide

RE: More old stuff incoming

On Wed, 19 Dec 2018, Ali wrote: > > I don't know how functional their solutions are and I've never had any > > of > > their products nor I have anything to do with them, but I've had this > > link: in my bookmarks just in case since > > 2005. > > I guess if they have

Re: More old stuff incoming

On Wed, 19 Dec 2018, Chuck Guzis via cctalk wrote: > >> Really? Show me one that is 1) in current production, 2) offers the > >> full ISA bus (not just some decoded address lines and 8 data lines), > >> 3) plugs into a PCI slot. > >> Christian > > > > Surprised no one has used something like an

Re: Text encoding Babel. Was Re: George Keremedjiev

On Tue, 4 Dec 2018, Liam Proven wrote: > > I don't know if the unreal mode has been retained in the x86 architecture > > to this day; as I noted above it was not officially supported. But then > > some originally undocumented x86 features, such as the second byte of AAD > > and AAM instructions

Re: SPARCstation 20 with SCSI2SD

On Sun, 2 Dec 2018, Jeffrey S. Worley via cctalk wrote: > The re-work of that Dallas nvram chip is just beautiful. It makes me > ashamed of myself. (I just chopped into the epoxy with a pocket knife, > soldered two leads, and velcroed the new batteries somewhere inside the > machine I installed

Re: Text encoding Babel. Was Re: George Keremedjiev

On Fri, 30 Nov 2018, Fred Cisin via cctalk wrote: > > Well, ATA drives at that time should have already had the capability to > > remap bad blocks or whole tracks transparently in the firmware, although > > Not even IDE. > Seagate ST4096 (ST506/412 MFM) 80MB formatted, which was still

Re: SPARCstation 20 with SCSI2SD

On Sat, 1 Dec 2018, alan--- via cctalk wrote: > I'm not sure what the 'B' in the middle means (silicon rev?), but the DS12885 > has been around for decades. I use them the JR-IDE project. Yes, the DS12885 is a standard part, still in production (with a trailing + marking RoHS compliance).

Re: SPARCstation 20 with SCSI2SD

On Tue, 27 Nov 2018, systems_glitch via cctalk wrote: > I probably need to do a writeup on fully potted parts, like the 48T59 and > DS1287. See a photo documentary here: for my proposal of a DS1287 rework. I actually had a nasty

Re: Text encoding Babel. Was Re: George Keremedjiev

On Fri, 30 Nov 2018, Fred Cisin via cctalk wrote: > I found the bad spot and put a SECTORS.BAD file there, and then was OK. > The Microsoft Beta program wanted cheerleaders, and ABSOLUTELY didn't want any > negative feedback nor bug reports, and insisted that the OS had no > responsibility to

Re: Text encoding Babel. Was Re: George Keremedjiev

On Sun, 25 Nov 2018, Liam Proven via cctalk wrote: > > > For example, right now, I am in my office in Křižíkova. I can't > > > type that name correctly without Unicode characters, because the ANSI > > > character set doesn't contain enough letters for Czech. > > > > Intriguing. Is there an old

RE: Astounding Asking Price

On Wed, 24 Oct 2018, Rob Jarratt via cctalk wrote: > > Instant alarm bells to me are a seller posting a London address but the > > item is > > 'for pickup only in Budapest, Hungary' > > Yes I noticed that too. Very odd, and £750 to ship to the UK!! They just chose to pay taxes in the UK

Re: WTB: 64K cache SIMM (72-pin)

On Sat, 1 Sep 2018, Cameron Kaiser via cctalk wrote: > An excellent question, but it is exactly the same socket as the 72-pin RAM > SIMMs below it. I even labouriously counted all the pins on the board socket > this morning just in case I'd missed something, and it's 72. The service > manual even

Re: DECstation firmware archive?

On Sun, 15 Jul 2018, emanuel stiebler via cctalk wrote: > > Are the firmware eproms for the DECstation archived anywhere? > > Are you looking for anything specific, or just like to save them? > > I have most of the decstations ('133, '150, '200, '240 and '260), > but all in containers, moving

Re: Restoring rubber keyboard on a logic analyzer

On Sun, 29 Apr 2018, Paul Koning via cctalk wrote: > So that's the answer: graphite powder. I now have a working analyzer > again. It will be interesting to see if the graphite wears off > eventually, I suppose it might but that's ok, I can just do it again. Many years ago I used graphite

Re: GDB front-end for SimH

On Tue, 24 Apr 2018, Paul Koning via cctalk wrote: > One drawback is that there aren't all that many SIMH architectures that > have GDB support. VAX does, and Alpha; that's about it. I don't know > how hard it is to do a basic platform in GDB, probably not all that > difficult. At least for

Re: DEC 3000 (alpha) faultfinding

On Sat, 31 Mar 2018, Peter Coghlan via cctalk wrote: > I ran the various tests provided by the different jumper settings on my second > 3000 600 and I found that the memTest (no-cache) LongWord Memory Test > (position > 5, J3) failed as well as the tests involving the cache. In an attempt to

Re: DEC 3000 (alpha) faultfinding

On Thu, 29 Mar 2018, Peter Coghlan via cctalk wrote: > It looks like position 0 (J8) is the normal operating position for the jumper > then and I did not move mine previously. With the jumper in this position, > I get some mini console output on power up but I do not get an SROM> prompt > and I

Re: DEC 3000 (alpha) faultfinding

Hi Peter, > J8 (position 0) is where the jumper already is on both my 3000 600 machines. > It is possible that this is where it normally is, however, it is also possible > that I moved it there some time ago in an attempt to diagnose the problem and > I have since forgotten. Which position is

Re: DEC 3000 (alpha) faultfinding

Hi Peter, > However, they do not provide the SROM> prompt or accept mini console commands > unless a I engineer another fault condition such as by pulling out one of the > memory risers. I wonder if there is a jumper to enable mini console commands > to be accepted without doing this? Looking

Re: Bug-for-bug compatibility [was RE: SimH DECtape vs. Tops-10 [was RE: Writing emulators [Was: Re: VCF PNW 2018: Pictures!]]]

On Wed, 28 Feb 2018, Paul Koning via cctalk wrote: > With the VAX, this got cleaned up to a significant extent, and ditto > with Alpha. In both cases, an internal validator tool was created to > verify that, at least from the point of view of instruction execution, a > new machine worked the

RE: ZX Spectrum Z80 Keeps Resetting

On Wed, 3 Jan 2018, Rob Jarratt via cctalk wrote: > The reason I say this is that when I set up the logic analyser to *stop* > on a zero ROM address, it didn't. Which means it isn't resetting in the > way I thought it was. When I traced the instruction addresses during > boot up I could see

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