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15563 discussions

by rien.timmer1947＠gmail.com

How do I setup the ethernet connection on Windows in order to enable SimH/VAXVMS to communicate with the world? I used: Set xu enable Set xu eth7 (my Wi-Fi connection) This gives me: sim> sho xu XU address=2013F948-2013F94F, vector=50, BR5, MAC=08:00:2B:00:01:05 type=DELUA, throttle=disabled attached to eth7 But VMS does not recognize UNA-0. Groeten, Rien Timmer

3 years, 6 months

Disallow login on DZ line in VMS

by system＠TMESIS.COM

Johnny Billquist <bqt at softjar.se> writes: >That /NOTYPE_AHEAD would disable logins in VMS is a bit surprising. >In my eyes, that's very unintuitive. /NOINTERACTIVE seems much more >sensible (yay for RSTS/E). When a terminal has no associated process and it receives unsolicited input, it forks into routine UNSOL in module TTYSUB. UNSOL notifies the job controller of the occurrance by sending a message to the job cntroller's permanet mailbox. This message contains the device name and precipitates the creation of a login process. There are various other actions based upon the type of terminal and other attributes of the device that may occur prior to the actions of the job controller but without TYPE_AHEAD, none of this occurs. >Sounds like VMS also have /NOINTERACTIVE...? VMS has no /NOINTERACTIVE. Interactive is a process right assigned to a process that is instantiated via an unsolicited interrupt on a terminal device. >In RSX, /NOTYPE_AHEAD just means you don't have any typeahead. If you >try typing something when nothing is reading, the characters are just >thrown away. But if a read is in progress, things works just as normal. I thought this was a question concerning VMS. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG I speak to machines with the voice of humanity.

3 years, 6 months

Disallow login on DZ line in VMS

by system＠TMESIS.COM

"Mark J. Blair" <nf6x at nf6x.net> writes: > > >> On Dec 20, 2021, at 6:00 PM, Brian Schenkenberger, VAXman- = ><system at TMESIS.COM> wrote: >>=20 >>> Sounds like VMS also have /NOINTERACTIVE...? >>=20 >> VMS has no /NOINTERACTIVE. Interactive is a process right assigned >> to a process that is instantiated via an unsolicited interrupt on a >> terminal device. > >/NOINTERACTIVE is not listed in the HELP SET TERM text, but SET TERM = >TTAn: /PERM/NOINTERACTIVE is accepted as a command where I tried it in = >v5.5 and v7.3, and it changes the first characteristic shown by SHOW = >TERM from "Interactive" to "Passall". /shrug /[NO]PASSALL is obsolete. You'll also find that it will disable other terminal features you may desire keeping. >From the VMS HELP for SET TERMINAL/TYPE_AHEAD: SET TERMINAL /TYPE_AHEAD /TYPE_AHEAD (default) /NOTYPE_AHEAD Controls whether the terminal accepts unsolicited input to the limit of the type-ahead buffer. When you specify the /NOTYPE_AHEAD qualifier, the terminal accepts input only when a program or the system issues a read to the terminal, such as for user input at the DCL prompt ($). When you specify the /TYPE_AHEAD qualifier, the amount of data that can be accepted is governed by the size of the type-ahead buffer. That size is determined by system generation parameters. >Thank you for your explanation of how a login prompt gets triggered. >That was neat. It's quite different from the way that happens in >unix-like OSes. Yup. Having a getty hanging about on all possible terminals seems a bit 1970 to me. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG I speak to machines with the voice of humanity.

3 years, 6 months

Disallow login on DZ line in VMS

by nf6x＠nf6x.net

The recent thread "Disallow system from dz lines (OpenVMS/VAX 7.3)" started me wondering how to entirely disable the login prompts on a given serial line, such as to use the port for some other purpose like controlling external hardware. I've been trying to find out how to do that in the manuals, but I haven't found it yet. It seems like it might be something to do with SET TERM, but I don't see obvious flags for that. Can anybody offer any hints? I won't be too surprised if my eyes have already glided over the answer in the manuals and HELP SET TERM text. -- Mark J. Blair, NF6X <nf6x at nf6x.net> https://www.nf6x.net/

3 years, 6 months

Disallow login on DZ line in VMS

by system＠TMESIS.COM

"Mark J. Blair" <nf6x at nf6x.net> writes: >The recent thread "Disallow system from dz lines (OpenVMS/VAX 7.3)" = >started me wondering how to entirely disable the login prompts on a = >given serial line, such as to use the port for some other purpose like = >controlling external hardware. I've been trying to find out how to do = >that in the manuals, but I haven't found it yet. It seems like it might = >be something to do with SET TERM, but I don't see obvious flags for = >that. Can anybody offer any hints? I won't be too surprised if my eyes = >have already glided over the answer in the manuals and HELP SET TERM = >text. Set the terminal line /NOTYPE_AHEAD. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG I speak to machines with the voice of humanity.

3 years, 6 months

DECnet/E programming manual / examples

by wboerhout＠gmail.com

Hi folks, I need to port a simple DECnet task-to-task program to RSTS/E V10.1, DECnet/E V4.1 Do any of you PDP-11 buffs have a DECnet/E programming manual. I know bitsavers doesn't. A small example in Fortran, Basic, Basic-Plus will also do. The functionality, expressed in VMS DCL, is as follows: $ open /read /write NETCHN REMOTE::"150=" $ write NETCHN "''f$trnlnm(SYS$NODE)'" $ read NETCHN time $ close NETCHN Thanks, Wilm

3 years, 6 months

Disallow system from dz lines (OpenVMS/VAX 7.3)

by supratim＠riseup.net

OpenVMS VAX 7.3: This stops remote logins to SYSTEM even if correct password is provided (works for set host and telnet with Digital TCP/IP, though my version of MULTINET does not honor it). Is there a way to deny SYSTEM account access when correct password is provided from DZ lines? Network:? -----? No access? ------??????????? -----? No access? ------ Batch:??? ##### Full access ######??????????? ##### Full access ###### Local:??? ##### Full access ######??????????? ##### Full access ###### Dialup:?? -----? No access? ------??????????? -----? No access ------ Remote:?? -----? No access? ------??????????? -----? No access ------ Thank you. Supratim

3 years, 6 months

continued adventure with buggy DECnet on VAX/VMS 3.5

by supratim＠riseup.net

I turned the Ethernet circuit off and set up a DMC line to DECnet/Python. What seems to be interesting is the Area does not seem to be propagating as part of the DECnet address and confusing DECnet/Python. [Non-Issue, just saying.] The following four things are reported in a loop. Event type 4.11, Initialization failure, line fault#012? From node 31.32 (PIPY), occurred 17-Dec-2021 16:03:05.499#012? Circuit = DDCMP-31-42#012??? Reason = Circuit synchronization lost Event type 4.10, Circuit up#012? From node 31.32 (PIPY), occurred 17-Dec-2021 16:03:15.473#012? Circuit = DDCMP-31-42#012 Adjacent node = 31.42 DDCMP-31-42 packet from wrong node 42 Event type 4.18, Adjacency down#012? From node 31.32 (PIPY), occurred 17-Dec-2021 16:03:15.494#012? Circuit = DDCMP-31-42#012??? Reason = Adjacency address out of range#012 Adjacent node = 31.42

3 years, 6 months

LAT

by bqt＠softjar.se

Jeez. After a lot of pain, and still not entirely good, I can at least report some good things about LAT with regards to Linux and RSX. As I mentioned before, there is some kind of a problem between the Linux latd and RSX LAT server. Using llogin to login on RSX systems, the terminal hangs after a while, and there is also some memory leak causing RSX to eventually become non-functional. The Linux latd code is horribly weird and ever after digging through it for days, it still does things I cannot explain. But there is definitely one bug in there, which is that it does not count credits when receiving data_b slots. That means the sender can run out of credits, while the Linux latd thinks the remote still have credits, and will not extend more. The "funny" thing is that Linux latd do count the credits when sending data_b slots. So I'd say that is a very obvious error in Linux latd (also - LAT documentation clearly states that data_b slots counts against credits). I've fixed this, and that solved the hanging problem towards RSX. I'm honestly surprised if this has not been a problem anywhere else, as it's the same for any kind of system. Either other systems are not sending data_b slots, or else there are bugs on more sides. I can provide the patch for this problem, but I wonder if anyone still "owns" that software, to whom I should send this... Second, Linux latd sends attention slots with a stop code of 0x40. This is, according to the LAT documentation, as well as RSX code, an undefined value. Not sure where the Linux latd got that value from. Third, Linux latd is broken when it comes to tracking and dealing with ACKs. This one I have not been able to figure out/understand. I can see on the wire that it's sending packets with a lower ACK number than the previous packet it sent out. Looking at the code, as well as trying to understand this in general seems crazy. It should not be possible for this to happen, but it does. Fortunately, it is on a stop message, for which RSX isn't happy about for other reasons anyway, so it don't matter. But I still thing it's totally crazy. Now, with all that said, I have also had to find and fix a couple of bugs in the RSX LAT code, which also is a little difficult to penetrate. Seems DEC can't really have tested this code that much, and whoever wrote it wasn't careful. Fixed version of the LAT bits have been included in the latest BQTCP distribution. If you install the RSX patches, LAT will be fixed. There are actually two problems I found in there. 1. If a circuit is closed down, and there is currently a transmit in progress, that transmit then becomes a lost buffer upon completion (this is the original RSX error I saw and mentioned before). This is clearly a case of timing issues, which I guess whoever wrote the code just didn't think about, or test carefully. 2. Slot attention messages with a valid stop code cause the system to crash. This is really weird. Because Linux latd was using an undefined value in the attention message, things worked just fine, but if I corrected that, RSX crashed. Which suggests that all terminal servers and other LAT software is in fact also using this wrong value in the attention message. Fixing this was just required saving and restoring a couple of registers at the right place. Again, this can't have been tested at all. Possibly the person writing the code thought he tested it by using DECservers or whatever, but if they actually were sending the wrong code, all looked good, but things did not get executed the way it should. Finally, Linux latd sends a circuit stop message that RSX do not like at all. The reason being that RSX at that point have already deleted the circuit, so it becomes a stop message for a circuit that does not exist. This will cause the illegal message counter to count, but nothing worse than that. I should break out a DECserver and compare to that. But I figure I should let people know about what I've been up to lately, which might also be interesting for others in here... Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

3 years, 7 months

Wanted: details on "system specific" NICE messages

by paulkoning＠comcast.net

I'm thinking it would be nice (in the tools with PyDECnet) to be able to do not just standard NICE requests like any other NCP, but also system-specific ones. I can find out what the RSTS ones look like, but I don't know about other systems. I'm pretty sure that both VMS and RSX have system-specific requests, SHOW and/or SET, for things like network objects or logical links and perhaps other stuff. Is there documentation that describes these? Does anyone have information handy? A few days ago VMS listings (from fiche) appeared in Bitsavers, and I suppose I can try to read NCP listings that are in there. Chances are they are in BLISS which I don't know at all... paul

3 years, 7 months

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