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Type: Posts; User: bqt

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  1. Replies
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    The reason Kermit was created to start with was...

    The reason Kermit was created to start with was to allow transfer of files between different type of machines. As such, of course it is a protocol. But just as much you also needed an implementation,...
  2. As far as I know, the problem with the J11 wasn't...

    As far as I know, the problem with the J11 wasn't volume, but that early production did not hit the speed target they were aiming for. Now sure they ever sorted that out, but there were lots of...
  3. The problem is that sources like Wikipedia claims...

    The problem is that sources like Wikipedia claims 600.000 PDP-11s were sold in total. Now, I can believe that plain T11 CPUs are outside of that scope, so VT240, RQDX3 (also DEUNA, probably the...
  4. Yes. I think that would probably be the main...

    Yes. I think that would probably be the main contestant for most produced PDP-11 CPU. However, I wonder if they really sold 300.000 of them...
    So if the Russian numbers are accurate, that could very...
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    Well, you'll have to decide what you want to...

    Well, you'll have to decide what you want to optimize for. I can easily write you a program that does 9360 digits on a PDP-11. But then it will be slow. So you accept to cut down on the number of...
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    Well, it does 4 digits per iteration. It just...

    Well, it does 4 digits per iteration. It just have a lower maximum number of digits. Still above 3000 by a large margin. Same algorithm, just a lower limit on the digits. Is that a "forbidden"...
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    Ah. Well then, even if you did have FILEX, it...

    Ah. Well then, even if you did have FILEX, it wouldn't help you. /DOS under RT-11 does not mean MS-DOS like file system, but DOS-11, which was a predecessor to RT-11 (sortof). The filesystem is...
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    Using a Pro with P/OS, I would recommend you try...

    Using a Pro with P/OS, I would recommend you try to locate TPC, which (if I remember right) can also dump diskettes to file.
    TPC is a DECUS program used primarily to copy tapes. It should be...
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    Feel free to disagree. I can only report that on...

    Feel free to disagree. I can only report that on a real 11/70, the front panel is mounted on the CPU box. The CPU box is then mounted on rails in the cabinet.
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    I think you missed my point. The front panel...

    I think you missed my point. The front panel *mounts* to the CPU box, and nothing else.
    Any number of BA11 will not help you. The circuit board is not mounted to the cabinet, it is mounted to the...
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    Your problem is that the front panel do not mount...

    Your problem is that the front panel do not mount to the rack. The front panel mounts to the CPU box. And the CPU box is a rather large piece of hardware, which you obviously are missing.
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    Just open it. There are several potentiometers...

    Just open it. There are several potentiometers you can adjust, and they are marked on the board what they are for. And one is for that exact thing.
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    So that would mean that the NPG is wired directly...

    So that would mean that the NPG is wired directly from the Unibus in to the Unibus out slot then? I've never seen a backplane like that. And I thought I had seen most everything.
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    There are two different kind of SPC slots. Normal...

    There are two different kind of SPC slots. Normal Unibus Device, and Modified Unibus Device (also called MUD). Look at any PDP-11 documentation, and you'll find out which slots are MUD.
    An 11/45 is...
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    Nice gadgets. But yes, they are computers. They...

    Nice gadgets. But yes, they are computers. They even come with a built-in web server, if you read the fine print. :-)
    And while there are certainly those who will appreciate the build-in Hayes...
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    A "WIFI/SSH/TELNET" adapter is called a computer....

    A "WIFI/SSH/TELNET" adapter is called a computer. The VT102 do not have any ability to do any processing. It simply sends bytes over a serial port, and that's all it does.
    If you want to talk SSH or...
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    Oh, and I forgot to mention. I can of course...

    Oh, and I forgot to mention. I can of course provide the code, if anyone is interested.

    And the 11/70 that I tried this on is Magica.Update.UU.SE. Feel free to telnet in, and play around. The...
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    So I was a bit bored the other day and decided to...

    So I was a bit bored the other day and decided to see if I could come up with some more numbers for the PDP-11, and also maybe improve the code.

    First of all, I am a bit curious about some numbers...
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    Yes. The 350 and 380 are the same case. Different...

    Yes. The 350 and 380 are the same case. Different motherboard.
  20. There is definitely way more devices than...

    There is definitely way more devices than addresses. Not helped by the fact that the number of functions available on one device is small. So some more advanced controllers grab a whole range of...
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    They definitely look very similar, but NeXT is...

    They definitely look very similar, but NeXT is right. The PRO is bigger.
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    I don't have any production numbers at hand....

    I don't have any production numbers at hand.
    However, if we talk large PDP-8 systems, then 50.000 seems reasonable.
    The DECmate, DECmate II, DECmate III and variants were fairly successful, so with...
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    I thought it was well known that CPU clock...

    I thought it was well known that CPU clock frequency is pretty meaningless as a way of telling anything about CPU speed. It's even worse than MIPS (which informally often is read as Meaningless...
  24. Thread: PDP-9 at the RICM

    by bqt
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    Have you considered looking at PIP10 in OS/8,...

    Have you considered looking at PIP10 in OS/8, which already exists, was designed for 18-bit DECtapes, and was extensively tested back in the day?
    Either make use of it directly, if the file systems...
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    RL drives don't need any alignment. They are self...

    RL drives don't need any alignment. They are self aligning drives. The only potential benefit of any type of alignment is that you might have a faster switch between the heads, as the heads might...
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