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  1. On of the most common issues is I find is...

    On of the most common issues is I find is rechargeable battery failure/leakage.

    Old hard drives fail in all sorts of ways. Head Crash,Capacitor failure, dried up lubrication....
  2. That looks like an RS6000 version of the adaptor,...

    That looks like an RS6000 version of the adaptor, Do you have any pictures?

    Any of these drivers work...

    https://www.tavi.co.uk/ps2pages/ohland/3com.html
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    yes, but I am in the UK... .. it would be...

    yes, but I am in the UK...
    .. it would be cheaper to buy one of the ones on E-bay
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    Take a read here:- ...

    Take a read here:-

    https://gamesx.com/controldata/ejp_faq.htm



    So analog paddles or joysticks can also be connected...
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    Yes the SC1224 is an Analogue monitor. It won't...

    Yes the SC1224 is an Analogue monitor. It won't work with unmodified CGA. It appears that some have tried:-

    https://atariage.com/forums/topic/258920-can-i-use-an-atari-sc1224-with-my-commodore-64/...
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    Sorry my bad. Some original STs had the mouse...

    Sorry my bad. Some original STs had the mouse ports where the floppy drives are on the "F" models. I have never seen such a machine but oddly there appears to be at least one on E-Bay now..
    ...
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    If its not analog RGB how do you get 512 colours...

    If its not analog RGB how do you get 512 colours on three RGB wires? In low and medium resolution thats how many colors the ST can produce, so its the same as convrting a 256 color VGA signal to RGB...
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    No ST has a mouse port on the side. STEs have...

    No ST has a mouse port on the side. STEs have analogue joystick ports but little software uses them. I guess you might need an extension cable ....

    https://www.ebay.com/itm/383100307339

    or you...
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    The ST can put out two types of video signal. A...

    The ST can put out two types of video signal. A "standard" TV compatible signal so 50hz so NTSC scan rates in the USA and PAL frame rates in Europe. All ST's output this as analog RGB. Those with a...
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    There are also various adaptors available that...

    There are also various adaptors available that allow the use of a USB mouse.
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    Its not true that there will be a crystal that's...

    Its not true that there will be a crystal that's at the fundamental frequency of of the system. Often the master clock runs a lot faster and is used to generate overlapping clock signals. A severe...
  12. Like these FPGA boards? ...

    Like these FPGA boards?

    https://www.xilinx.com/products/boards-and-kits/accelerator-cards.html

    in any case in general it is rare to max out the CPU on many modern boxes. It normally the Disk...
  13. We have done things both ways. Sometimes there...

    We have done things both ways. Sometimes there was "capital" budget and we could buy new machines, but might end up parting them for spares because it was easier than building a new machine. More...
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    I think most went via the SS30 bus and used the...

    I think most went via the SS30 bus and used the 1771 chip. Mike Holley has diagrams etc..

    http://www.swtpc.com/mholley/storage.htm
  15. Thread: MicroVAX 3300

    by g4ugm
    Replies
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    422

    thats a bugger as they say in Newcastle... ......

    thats a bugger as they say in Newcastle...
    ... do you think you could use a modern PC Server PSU?
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    Well yes its a very lightweight substance so as...

    Well yes its a very lightweight substance so as the lighter molecules evaporate out first what remains are the heavier ones. So like all natural "oils" it gets thicker and gungy over time. What the...
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    Thats great news. Glad its got a taket

    Thats great news. Glad its got a taket
  18. Humans almost always underestimate the number of...

    Humans almost always underestimate the number of runs of say ascending values, or the same value in a random sequence, say when dealing cards. I am not going to go into the maths but you would...
  19. Thread: MicroVAX 3300

    by g4ugm
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    422

    From what I have seen in the manuals only the...

    From what I have seen in the manuals only the cable changed, which implies the PSUs are auto-sense, but I can't believe that PSUs that old would have that capability....

    Might be worth asking on...
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    I remember this terminals family with great...

    I remember this terminals family with great affection. The Honeywell I worked on had commands added to allow files to be downloaded to the tape or terminal memory. They were lovely screens...
    ......
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    The linears are usually badly regulated and rely...

    The linears are usually badly regulated and rely on a load to keep them in spec. They will always fail with no load. Try with a resistor that is about half load...
  22. Thread: MicroVAX 3100

    by g4ugm
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    1,077

    Hope to see you there

    Hope to see you there
  23. Thread: MicroVAX 3100

    by g4ugm
    Replies
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    1,077

    Great. Are you taking it to DEC Legacy? ...

    Great. Are you taking it to DEC Legacy?

    https://wickensonline.co.uk/declegacy/
  24. Thread: MicroVAX 3100

    by g4ugm
    Replies
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    1,077

    There are ".iso" files on the VAXHAVEN server,...

    There are ".iso" files on the VAXHAVEN server, but because the layout is File-11 not the normal CD ISO9660 format so you may need a tool that to write the CD and you can't mount it on Windows or...
  25. Thread: MicroVAX 3100

    by g4ugm
    Replies
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    1,077

    It might be worth proding around on the disk...

    It might be worth proding around on the disk first to see what is on there, or even adding a second SCSI drive and booting from that. It may need to be <1GB . I know the Vaxstation 3100 M30 I have...
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