Image Map Image Map
Tab Content
  • Lou - N2MIY's Avatar
    Yesterday, 05:24 PM
    Roland, I just watched the video and you've really done a beautiful job once again! I am indeed one of those people who would like to build...
    16 replies | 444 view(s)
  • jackrubin's Avatar
    Yesterday, 09:36 AM
    jackrubin replied to a thread VC8E point plot 74xx replica in DEC
    Here's a link to my folder on the KV8I, a bit more elaborate implementation using the TEK 611 but also supporting a joystick. The cabling and 611...
    16 replies | 444 view(s)
  • m_thompson's Avatar
    Yesterday, 04:20 AM
    How about a quad board with a KT8A and 128kw of RAM, and other peripherals.
    16 replies | 444 view(s)
  • Ed Groenenberg's Avatar
    Yesterday, 12:01 AM
    I am listing this for a friend. The machine is a Sun 4/280, with 64Mb ram, a 9track tapedrive and 2 DK815 800Mb Fujitsu SMD drives. The machine...
    2 replies | 82 view(s)
  • m_thompson's Avatar
    June 24th, 2019, 04:01 PM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Looks like the S107 module in the TC02 inverts two of the device address bits from the processor. One of the inverted bits is inactive, so the next...
    58 replies | 6484 view(s)
  • jackrubin's Avatar
    June 24th, 2019, 05:01 AM
    jackrubin replied to a thread VC8E point plot 74xx replica in DEC
    Re the M8650, I've got several of them with DL1 (30 ns delay line) either broken off or missing altogether; I expect others do as well. A small...
    16 replies | 444 view(s)
  • m_thompson's Avatar
    June 24th, 2019, 03:58 AM
    Roland, An combination I/O card that included RTC, two serial, Centronics printer port, memory, and bootloader would be really great. It would...
    16 replies | 444 view(s)
  • m_thompson's Avatar
    June 23rd, 2019, 03:50 PM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    We connected up the I/O cables from the PDP-9 processor to the TC02 and borrowed the indicator display cables from the TC59 controller. When...
    58 replies | 6484 view(s)
  • m_thompson's Avatar
    June 23rd, 2019, 03:49 PM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    I could only find Dialight 507-397-1475-600 replacements. The originals are flush with the front panel. The replacements stick out about 1/8".
    58 replies | 6484 view(s)
  • wa2flq's Avatar
    June 23rd, 2019, 03:03 PM
    This board has both the KWV11 (A or C) and the vendors own Clock/Calendar implementation. Dec did not include a TOY clock until pretty late in the...
    2 replies | 84 view(s)
  • jackrubin's Avatar
    June 23rd, 2019, 06:31 AM
    jackrubin replied to a thread PDP-9 at the RICM in DEC
    What bulbs does the panel require? Were you able to find present-day replacements or are you using old spares? I've got a couple of TC02 panels to...
    58 replies | 6484 view(s)
  • m_thompson's Avatar
    June 23rd, 2019, 05:34 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    The original power supply in the I/O cabinet for the TC59 Magnetic Tape controller didn't have enough power to also feed the TC02 DECtape controller....
    58 replies | 6484 view(s)
  • jackrubin's Avatar
    June 22nd, 2019, 07:58 PM
    I was actually looking at the MC8/I, which uses a 3-bit IF/DF for the full 32K words of memory on the 8/I, rather than the MC8/L. Either way, you're...
    115 replies | 10522 view(s)
  • jackrubin's Avatar
    June 22nd, 2019, 12:03 PM
    jackrubin replied to a thread VC8E point plot 74xx replica in DEC
    I expect there's a whole lot of people who would say we're all 4 bits short of a word. Keep calm and carry on (at least 'til October 31) ...
    16 replies | 444 view(s)
  • wa2flq's Avatar
    June 20th, 2019, 05:34 PM
    The Peritek VRG-Q could do 512x512. It used a HD46505 CRTC chip. The memory could be mapped (16KW) for machines that had 18 or 22 bit...
    28 replies | 4887 view(s)
  • jackrubin's Avatar
    June 20th, 2019, 11:39 AM
    A member of another mailing list pointed out this 24K memory expansion box for the 8/I -...
    115 replies | 10522 view(s)
  • jackrubin's Avatar
    June 20th, 2019, 06:23 AM
    The boards look great, but I'd still vote for SMD bypass caps. 0805 parts are easy and a nice way to transition toward that technology. Maybe rev 2?...
    115 replies | 10522 view(s)
  • jackrubin's Avatar
    June 19th, 2019, 12:23 PM
    My set of Logic Boards is here! I guess I'll start inserting bypass caps while I wait for daver2 to finish up the front panel. :>) Marty, would...
    115 replies | 10522 view(s)
  • wa2flq's Avatar
    June 17th, 2019, 09:19 PM
    I remember coming across this back when I had a PDP 11/34. The cables running from the controller to the KY11-LB laid pretty flat in the chassis. I...
    3 replies | 155 view(s)
  • m_thompson's Avatar
    June 17th, 2019, 03:56 PM
    m_thompson replied to a thread RK05 fan blower motor in DEC
    As a separate project we should determine why the blower motors are going bad. I have three of them where the internal connection between the start...
    17 replies | 706 view(s)
  • m_thompson's Avatar
    June 17th, 2019, 03:44 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Yes, it would be interesting to see how yours is wired.
    58 replies | 6484 view(s)
  • m_thompson's Avatar
    June 16th, 2019, 06:39 AM
    m_thompson replied to a thread PDP-9 at the RICM in DEC
    Yesterday we wired the DC power to the TC02 DECtape controller (thanks Charles Lasner) and the two TU55 DECtape drives that we recently installed in...
    58 replies | 6484 view(s)
  • m_thompson's Avatar
    June 16th, 2019, 05:46 AM
    m_thompson replied to a thread What is DB08? in DEC
    it is an interprocessor buffer to interconnect two PDP-8 systems, or maybe your PDP-9 and a PDP-8. You need to find the 08-H8PA-D PDP-8 DB08...
    1 replies | 138 view(s)
  • jackrubin's Avatar
    June 15th, 2019, 03:44 AM
    I bought my DM-2's from Halted/HSC before they went out of business (they closed in early 2019), where they were listed as G797-1. This is also where...
    11 replies | 445 view(s)
  • wa2flq's Avatar
    June 14th, 2019, 07:33 PM
    wa2flq replied to a thread PDP-11/34A interrupt problem in DEC
    Congratulations! Learned a few new things myself. Try a .DIFF/BIN RT11SJ.40 RT11SJ.060 and the differences and locations will be quickly...
    28 replies | 654 view(s)
  • jackrubin's Avatar
    June 14th, 2019, 04:39 PM
    I've been through my box of DM-1 and DM-2 diodes and can't really see any difference between them. I'm still trying to find specs on them, but no...
    11 replies | 445 view(s)
  • wa2flq's Avatar
    June 14th, 2019, 10:13 AM
    wa2flq replied to a thread PDP-11/34A interrupt problem in DEC
    It definitely possible. The console addresses are easily patchable w/o having to generate a new system. See...
    28 replies | 654 view(s)
  • jackrubin's Avatar
    June 14th, 2019, 07:05 AM
    jackrubin replied to a thread SerialDisk sans BSW in DEC
    That would be great - please send copies to me and Kyle. Thanks!
    2 replies | 125 view(s)
  • m_thompson's Avatar
    June 14th, 2019, 04:24 AM
    m_thompson replied to a thread SerialDisk sans BSW in DEC
    Charles modified the handler so it would run on the RICM PDP-12, so it should run on your 8/I. I believe that Kyle has a copy of the...
    2 replies | 125 view(s)
  • jackrubin's Avatar
    June 13th, 2019, 05:32 PM
    Arrgh!! I couldn't stand the suspense, so I placed my own order with JLCPCB. There should be 5 boards on this side of the ocean some time next...
    115 replies | 10522 view(s)
More Activity
About jackrubin

Basic Information

About jackrubin
Biography:
Started computing in 1959 (GENIAC), still trying to figure things out
Location:
Wilmette, IL (north of Chicago)
Interests:
CP/M, PDP8 & 11, RTTY
Occupation:
Stay-at-home computer dad

Signature


Statistics


Total Posts
Total Posts
661
Posts Per Day
0.12
Albums
Total Albums
2
Total Photos
10
General Information
Last Activity
Today 05:23 AM
Join Date
March 11th, 2004
Referrals
2

8 Friends

  1. Ed Groenenberg Ed Groenenberg is offline

    Member

    Ed Groenenberg
  2. Lou - N2MIY Lou - N2MIY is offline

    Senior Member

    Lou - N2MIY
  3. m_thompson m_thompson is offline

    Senior Member

    m_thompson
  4. orgwood orgwood is offline

    Member

    orgwood
  5. Perkunas Perkunas is offline

    Junior Member

    Perkunas
  6. RSX11M+ RSX11M+ is offline

    Senior Member

    RSX11M+
  7. Silent700 Silent700 is offline

    Member

    Silent700
  8. wa2flq wa2flq is offline

    Senior Member

    wa2flq
Showing Friends 1 to 8 of 8
View jackrubin's Blog

Recent Entries

DEC extender adapter for over-the-top OMNIBUS boards

by jackrubin on June 30th, 2017 at 01:50 PM
Quote Originally Posted by jackrubin View Post
Revision 2 just arrived - smaller board, no vias. Based on how hard I had to smack the connectors with the hammer, I've opened the holes up a little in the next batch. First cable set goes out for testing tomorrow.





Read More

Categories
Uncategorized