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  • Roland Huisman's Avatar
    Today, 02:20 AM
    So here are the raw paper tape images. I've sent them to Vince as well. I hope he can check them and archive them. I'm curious to the music...
    34 replies | 1907 view(s)
  • Roland Huisman's Avatar
    Today, 02:16 AM
    Thanks, I will check them out. What I was missing are the default settings. I found the defaults in the engineering drawings for the RX11...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 13th, 2020, 01:26 PM
    Okay dropped the Unibone related questions on the Unibone forum. In the meanwhile I have been searching for the default settings for the M7846...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 12th, 2020, 10:46 PM
    Indeed, that is my quick and dirty way to see if I have configured the memory modules in a correct way before I run software or maindecs. Good to...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 12th, 2020, 12:15 PM
    Yes I have seen that PDP11 GUI, a very nice piece of work! So I'm going to check that out somewhere next week. Well, it would be nice to know...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 12th, 2020, 05:41 AM
    Thanks and it is confirmed, the M9301 was still broken! The error was in the addressing circuit with a broken SN7420. So two broken chips on one...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 12th, 2020, 04:25 AM
    Okay great! I already had such a suspicion. Never had a PDP8 to lock up on me for that ;) I tried to examine memory at 173000-173776 and...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 12th, 2020, 02:30 AM
    I'm wondering, in the minimal configuration I can read memory by examining addresses in a normal way... But from address 040000 and up the address...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 11th, 2020, 12:23 PM
    Did some more testing with other programs and got the loop back going now as well. @ Mattis, I tried the M9301 but that card is not working well....
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 11th, 2020, 05:28 AM
    Hi Mattis, Yes I have a M9301 but in unknown state. I have also build a Unibone but this is not tested either. I want to start with the plain...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 11th, 2020, 12:32 AM
    Xmas was early this year! But oh dear... this is 16 bit! 4 bits more than the 12 that I'm used too :sigh: So pulled out all of the boards and...
    25 replies | 664 view(s)
  • Roland Huisman's Avatar
    July 5th, 2020, 12:48 PM
    Roland Huisman replied to a thread Tektronix 4052 in Other
    In the meanwhile I found the manual for that serial module too. It explains how to use it from the software side and the settings for the jumpers....
    10 replies | 117 view(s)
  • Roland Huisman's Avatar
    July 5th, 2020, 09:37 AM
    Roland Huisman replied to a thread Tektronix 4052 in Other
    True, if you have the right equipment... Time for a new (old) programmer I guess... It is a 10L8. I will check if I have other options to read it....
    10 replies | 117 view(s)
  • Roland Huisman's Avatar
    July 5th, 2020, 08:55 AM
    Roland Huisman replied to a thread Tektronix 4052 in Other
    Hello Jos and Monty, Here is a picture of the serial board. I will check if I can read the EPROM soon. But there is also a PAL chip... :( ...
    10 replies | 117 view(s)
  • Roland Huisman's Avatar
    July 5th, 2020, 07:49 AM
    Roland Huisman replied to a thread Tektronix 4010 in Other
    That was the manual I found later indeed. The cable is now back to the original wiring scheme. I will check out the plot files!
    6 replies | 155 view(s)
  • Roland Huisman's Avatar
    July 5th, 2020, 05:29 AM
    Roland Huisman started a thread Tektronix 4052 in Other
    Hi everyone, Last week I saved this old Tektronix 4052 from being scrapped. I had seen it before being dumped in a corner waiting to be...
    10 replies | 117 view(s)
  • Roland Huisman's Avatar
    July 4th, 2020, 04:03 PM
    Roland Huisman replied to a thread Tektronix 4010 in Other
    Hi Monty, I will make a new topic for the 4052 and post some pictures from it. I've made a lot of pictures of my 4010 and sent them to Kurt...
    6 replies | 155 view(s)
  • Roland Huisman's Avatar
    July 4th, 2020, 12:40 PM
    Roland Huisman replied to a thread Tektronix 4010 in Other
    Hi Jos, Thanks, I will check it out! The data cable is a bit messy. Only gnd, rx and tx are connected trough an old mains cable. :sad: So I...
    6 replies | 155 view(s)
  • Roland Huisman's Avatar
    July 4th, 2020, 12:22 AM
    Roland Huisman started a thread Tektronix 4010 in Other
    Last week I've picked up some nice old pieces of history. One of them was the Tektronix 4010. Because it has collected dirt for 46 years, I...
    6 replies | 155 view(s)
  • Roland Huisman's Avatar
    June 30th, 2020, 11:41 PM
    Hi Vince, Then I will read all tapes. Is it okay that I sent the images to you? You seem to have all the tools and a brilliant website to share...
    34 replies | 1907 view(s)
  • Roland Huisman's Avatar
    June 30th, 2020, 05:59 AM
    Hi Monty, I've picked up the the Tek yesterday. It is an 4052. And I got an 4010 also! I have been told that both are defective. So both are...
    27 replies | 3929 view(s)
  • Roland Huisman's Avatar
    June 29th, 2020, 01:05 PM
    Okay, got a bunch of new software today. If there is anything interesting, let me know. I assume that all the DEC labelled stuff is online...
    34 replies | 1907 view(s)
  • Roland Huisman's Avatar
    June 28th, 2020, 12:48 PM
    Very nice find! A real 12 bit mini computer! Some collectors are searching literally YEARS for these things... (Or just pay a LOT of money for it)...
    24 replies | 897 view(s)
  • Roland Huisman's Avatar
    June 23rd, 2020, 10:19 AM
    Hi Andrew, No these are to a good new home. Regards, Roland
    5 replies | 1702 view(s)
  • Roland Huisman's Avatar
    June 22nd, 2020, 07:21 AM
    These boards are on their way to their new owners. BTW, If anyone has done a run of the VC8E boards then I'm interested in one bare M885R DAC...
    45 replies | 5747 view(s)
  • Roland Huisman's Avatar
    June 19th, 2020, 10:57 AM
    I've made a little interface PCB to connect the VC8E directly to a Tektronix monitor. There is a range of Tektronix XYZ monitors which have a DB25...
    45 replies | 5747 view(s)
  • Roland Huisman's Avatar
    June 19th, 2020, 12:40 AM
    I could not resist it! There was a complete 8KW core stack on Ebay. https://www.ebay.com/itm/184316500020 Not tested, No warranty, No returns......
    3 replies | 287 view(s)
  • Roland Huisman's Avatar
    June 15th, 2020, 11:59 AM
    Well the PDP8/F had its ups and downs... At first I modified the power supply wiring. In my PDP8/M I had a fried power connector. The +5V wire was...
    9 replies | 1151 view(s)
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About Roland Huisman

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About Roland Huisman
Location:
The Netherlands
Interests:
Old technology like Radio, TV, VCR and computing.
Occupation:
Electronics engineer

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WTB: Case for Altair 8800 ...... Rolands Github projects

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