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  • daver2's Avatar
    Today, 10:01 AM
    daver2 replied to a thread Tektronix 'Board Bucket' 6800 in Other
    I have got a few more DDT commands operational. 100L sets an internal address pointer for subsequent use. "112233 stores the hexadecimal values...
    42 replies | 3456 view(s)
  • daver2's Avatar
    Yesterday, 02:22 PM
    daver2 replied to a thread Tektronix 'Board Bucket' 6800 in Other
    Monty, Thanks for that little gem of knowledge :-)! They are sufficiently similar to get me kickstarted into understanding more of the commands...
    42 replies | 3456 view(s)
  • daver2's Avatar
    Yesterday, 12:42 PM
    daver2 replied to a thread Tektronix 'Board Bucket' 6800 in Other
    Falter, Thanks for the DDT ROM dump. I now have DDT running in my emulator. Trying to document the commands now. I still can't find any...
    42 replies | 3456 view(s)
  • daver2's Avatar
    October 14th, 2018, 05:16 AM
    I am going on a business trip for the week so will not be on VCFED for a while. If I assume that you are not getting any a.c. Volts out of the...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 13th, 2018, 11:30 PM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    If you are using Kermit, I have seen the command "set flow xon/xoff" and "set flow ?" To query the setting. See...
    34 replies | 1370 view(s)
  • daver2's Avatar
    October 13th, 2018, 11:15 PM
    daver2 replied to a thread Intecolor 2400 in Other
    If the Tektronix Board Bucket looks like it is going to die - can I suggest that you get a dump of the machine code monitor for posterity just in...
    33 replies | 1453 view(s)
  • daver2's Avatar
    October 13th, 2018, 11:34 AM
    I thought I would start simply and find what level you were at... I just want to confirm something please before we move on. In the last post you...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 13th, 2018, 03:27 AM
    So, if you look at J8 (the power connector), you will see it is a 9 pin connector with pin 7 missing (the key way). The pins are numbered: 1, 2,...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 13th, 2018, 03:11 AM
    You may find some of the capacitors awkward to measure the voltage on from the top of the main board. If so, proceed as follows: Meter negative...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 13th, 2018, 02:10 AM
    I have just read your first post in a little more detail. To be clear - the output from the transformer is a.c. voltages and the external green...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 13th, 2018, 02:01 AM
    Just because the voltages are wrong across the devices you are measuring - don't assume the device is faulty... Let us assume that the transformer...
    13 replies | 516 view(s)
  • daver2's Avatar
    October 11th, 2018, 05:42 AM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    Just got back from a business trip and caught up with your progress - but about to go on another one... Something in my water seems to be telling...
    34 replies | 1370 view(s)
  • daver2's Avatar
    October 8th, 2018, 02:58 AM
    For the reader part - Decitek are still around - http://www.decitek.com/. It looks to me as though the Decitek reader mechanism may have been...
    2 replies | 156 view(s)
  • daver2's Avatar
    October 7th, 2018, 06:15 AM
    daver2 replied to a thread PDP8/m fix before use... in DEC
    The old ones are the best :-)! Glad you're operational again though... Dave
    14 replies | 679 view(s)
  • daver2's Avatar
    October 7th, 2018, 12:02 AM
    daver2 replied to a thread PDP8/m fix before use... in DEC
    My guess would be memory or disk corruption somewhere. It looks like the prompt 'character' has become corrupt. I wonder if they use a string-based...
    14 replies | 679 view(s)
  • daver2's Avatar
    October 6th, 2018, 11:55 PM
    Read the thread entitled "Commodore PET 4016 - REPAIRED!" (The last few parts" where the poster had a keyboard that only had a few keys that just...
    11 replies | 461 view(s)
  • daver2's Avatar
    October 6th, 2018, 12:17 AM
    You can still buy twisted pair ribbon cable - we use it at work. How many cores do you need and what length? If we have something that you can...
    8 replies | 1307 view(s)
  • daver2's Avatar
    October 6th, 2018, 12:01 AM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    Good going Mike. The number of blocks is just the number of contiguous blocks of core you wish to punch to the paper tape. If you only have 1...
    34 replies | 1370 view(s)
  • daver2's Avatar
    October 2nd, 2018, 06:07 AM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    There are various websites describing failure modes of ICs. The JEDEC website is pretty much the definitive guide. Manufacturing processess have...
    34 replies | 1370 view(s)
  • daver2's Avatar
    October 2nd, 2018, 05:57 AM
    I suspect this is a Ringlock connector (https://www.ittcannon.com/products/trident-ringlock-(tr)/). We use these a lot at work. I would suspect...
    2 replies | 152 view(s)
  • daver2's Avatar
    October 1st, 2018, 11:51 AM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    Mike, Did you save E17 at all? Even if you snip it out of the board - if you take care you should be able to still test the device outside of...
    34 replies | 1370 view(s)
  • daver2's Avatar
    October 1st, 2018, 11:41 AM
    daver2 replied to a thread Document scanning in DEC
    Thanks for sharing that - it looks a really useful document from what I have read so far. Dave
    5 replies | 338 view(s)
  • daver2's Avatar
    September 30th, 2018, 11:59 AM
    daver2 replied to a thread REMEX Paper Tape reader in DEC
    Welcome back Mike. Putting the 'T' away for the winter break? Dave
    34 replies | 1370 view(s)
  • daver2's Avatar
    September 30th, 2018, 11:55 AM
    My son is at university where he set-up some very expensive 3D printers - so the service came for free for me! The university also paid for the...
    16 replies | 794 view(s)
  • daver2's Avatar
    September 30th, 2018, 10:12 AM
    If you didn't see my previous thread a while ago - my son 3D printed me a full set of handles (excuse the poor photography) - see...
    16 replies | 794 view(s)
  • daver2's Avatar
    September 30th, 2018, 09:58 AM
    daver2 replied to a thread Tektronix 4052 emulator. in Other
    I was going to get around to looking at the BASIC source code - so I spent a little time this afternoon having a look. The FCxx and C7xx are...
    37 replies | 1773 view(s)
  • daver2's Avatar
    September 29th, 2018, 03:22 PM
    Get the software downloads first and worry about the disk geometry later. http://apple2online.com/index.php?p=1_49_CPM-Library ...
    3 replies | 307 view(s)
  • daver2's Avatar
    September 29th, 2018, 09:51 AM
    Just to clarify the information on this webpage: The 'xxxx' will be replaced by a 4-digit hexadecimal address that is related to where DEBUG is...
    56 replies | 1813 view(s)
  • daver2's Avatar
    September 25th, 2018, 10:48 PM
    Good news you are working now. I note that their website had software for DOS, pre-Vista and Vista onwards. i suspect both the latter downloads...
    20 replies | 582 view(s)
  • daver2's Avatar
    September 25th, 2018, 10:31 AM
    Looking on the companies house website they may still exist. They filed their last years reports at any rate. Dave
    20 replies | 582 view(s)
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