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  • glitch's Avatar
    Today, 09:04 AM
    Neither the IMSAI MPU nor the SD Systems SBC100/200 will operate like that, though.
    13 replies | 207 view(s)
  • glitch's Avatar
    Today, 06:04 AM
    That's the high end of reasonable, it does look like it's pretty clean and is at least shown to not have smoked when you powered it up! The SD...
    13 replies | 207 view(s)
  • glitch's Avatar
    Today, 05:57 AM
    glitch replied to a thread Wire wrap in Minis and Mainframes
    Phoenix Enterprises still carries a lot of wire wrap supplies for decent prices: https://www.peconnectors.com/wire-wrap-sockets-and-headers/ I...
    22 replies | 321 view(s)
  • glitch's Avatar
    Yesterday, 04:04 PM
    glitch replied to a thread Digiac 4500 Fixup/Repurpose in S-100
    Yup, when the guy who's getting the box says he wants it that way! The cables from the SCP board to the backplate I/O connectors are not original, I...
    20 replies | 2924 view(s)
  • glitch's Avatar
    Yesterday, 03:58 PM
    glitch replied to a thread CIT-101 terminal in DEC
    Even then, they can often be rejuvenated -- Sark/RetroHacker_ has done that for several of my CRT-containing devices when the option was that or...
    10 replies | 274 view(s)
  • glitch's Avatar
    Yesterday, 03:56 PM
    glitch replied to a thread Wire wrap in Minis and Mainframes
    Indeed, I learned wire wrap due to too many issues trying to prototype circuits with CPUs that require a real data and address bus (e.g. not...
    22 replies | 321 view(s)
  • glitch's Avatar
    Yesterday, 06:57 AM
    glitch replied to a thread Wire wrap in Minis and Mainframes
    Not only does it cold weld (when you use a proper tool with the proper wire), but silver oxide conducts nearly as well as silver. That's why it's...
    22 replies | 321 view(s)
  • wa2flq's Avatar
    Yesterday, 12:22 AM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    The plastic handles are the usual spots for the revision stamps (component side). I don't recall what the fix was for, but I doubt that the DD drive...
    11 replies | 217 view(s)
  • retro-pc_user's Avatar
    February 18th, 2019, 08:55 PM
    Is there a particular issue you're facing with it?
    1 replies | 52 view(s)
  • glitch's Avatar
    February 18th, 2019, 05:35 PM
    glitch replied to a thread CIT-101 terminal in DEC
    The VT-100 and the CIT-101 are totally different animals inside. I've got both. The keyboards are definitely *not* compatible, though I think I've...
    10 replies | 274 view(s)
  • glitch's Avatar
    February 18th, 2019, 06:51 AM
    glitch replied to a thread Wire wrap in Minis and Mainframes
    Hah, yeah, big wire wrap boards can be a bit...intimidating :) Some of those big ones are done with automatic or semi-automatic machines.
    22 replies | 321 view(s)
  • glitch's Avatar
    February 18th, 2019, 06:07 AM
    glitch replied to a thread Its Back!!! IMS 8000 in S-100
    I've got a quantity of them, if you can't find a source in the UK. PM me if you need some!
    10 replies | 189 view(s)
  • wa2flq's Avatar
    February 17th, 2019, 07:11 PM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    I get the feeling that it dies near the code that determines the actual device type. Perhaps interrupts are being missed? If the DLV11J is a true...
    11 replies | 217 view(s)
  • glitch's Avatar
    February 17th, 2019, 05:50 PM
    glitch replied to a thread Its Back!!! IMS 8000 in S-100
    Excellent! Just got another not-IMS system finished today with an IMS 4 MHz Z80 board, they seemed to make really solid hardware. Glad to see it...
    10 replies | 189 view(s)
  • glitch's Avatar
    February 17th, 2019, 10:52 AM
    glitch replied to a thread Digiac 4500 Fixup/Repurpose in S-100
    Today I finished assembling the system! Here's the card cage. From front to rear: reproduction SSM IO-2 for ROM and mini front panel, IMS 4...
    20 replies | 2924 view(s)
  • glitch's Avatar
    February 17th, 2019, 10:51 AM
    glitch replied to a thread Digiac 4500 Fixup/Repurpose in S-100
    Gorgo did deliver on documentation for the Digiac 4500, and I've continued my efforts into rebuilding/repurposing this one. It's pretty much done...
    20 replies | 2924 view(s)
  • glitch's Avatar
    February 17th, 2019, 08:33 AM
    Yep, I mentioned above that I might see if I can shorten it to clear the ROM option switches when using a right-angle IDE header.
    28 replies | 971 view(s)
  • glitch's Avatar
    February 16th, 2019, 04:46 PM
    Thanks everyone! I don't know of a readily available ISA bracket with the CF slot in the right place and the same mounting holes. I will measure...
    28 replies | 971 view(s)
  • glitch's Avatar
    February 16th, 2019, 02:53 PM
    Prototypes are in! Assembled module. Pretty sure the CF socket soldered down faster than the 40-pin IDE header. My new footprint matched up...
    28 replies | 971 view(s)
  • glitch's Avatar
    February 16th, 2019, 09:15 AM
    I've got the Plus version of the Z80 board as well, I haven't had time to play with the SCSI option but I'd like to get it going at some point! On...
    5 replies | 204 view(s)
  • glitch's Avatar
    February 16th, 2019, 09:11 AM
    It should be 8-bit PC/104, Ampro called it "StackPlane" back then but IIRC it's just the 8-bit section of a PC/104 header. They of course used the...
    2 replies | 62 view(s)
  • retro-pc_user's Avatar
    February 15th, 2019, 08:31 PM
    I have the exact CD-ROM drive myself that's installed in my Packard Bell desktop. It needed the eject mechanism repaired (would open slowly and...
    9 replies | 127 view(s)
  • retro-pc_user's Avatar
    February 15th, 2019, 02:18 PM
    Do you have the SBCD.SYS file and MSCDEX.EXE on a bootable diskette? Also, check the parameters. Link:...
    9 replies | 127 view(s)
  • wa2flq's Avatar
    February 15th, 2019, 12:18 PM
    wa2flq replied to a thread Testing a DEQNA (M7504) board in DEC
    I believe the last two digits indicate a revision level. There is some supplemental information in the EK-DELQA-UG-002 and EK-DEQNA-UG-001 about...
    11 replies | 217 view(s)
  • glitch's Avatar
    February 15th, 2019, 07:07 AM
    Wrong coast for me, but I bet there's some cool stuff in there!
    4 replies | 254 view(s)
  • wa2flq's Avatar
    February 14th, 2019, 07:37 PM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    The quad board was the original release of the UC07. The latest firmware rev for the UC07 I am aware of is G143R on dual board. I reviewed my...
    65 replies | 4062 view(s)
  • glitch's Avatar
    February 14th, 2019, 12:53 PM
    The only thing I could see that *might* sell them at those prices would be some industrial customer that just has to have it to put a line back in...
    25 replies | 739 view(s)
  • glitch's Avatar
    February 14th, 2019, 07:25 AM
    A popular one is the "Lil'7" one-tube design, which is based off of adapters sold to allow one to play records to their AM radio, I guess so you...
    25 replies | 739 view(s)
  • wa2flq's Avatar
    February 14th, 2019, 06:02 AM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    Yes that is true. My intent was to keep the configuration complexity low and provide options with row risks for someone new to the architecture. ...
    65 replies | 4062 view(s)
  • wa2flq's Avatar
    February 13th, 2019, 10:01 PM
    wa2flq replied to a thread Bought a PDP-11/03-L in DEC
    I researched this a bit more. If you look at pictures of the component and solder side of the board, you will see that the CD slots of the board only...
    65 replies | 4062 view(s)
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    Those guys were NOT pushed very heavily on the west coast--My '76-'77 stint @ BYTE of Lawndale was before they even came out---Then I worked with Byte/Bellevue WA and they heavily pushed Northstar, and Altos...

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    hi.............
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