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Type: Posts; User: TangentDelta

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  1. Replies
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    It's an older image that I took, but here is my...

    It's an older image that I took, but here is my PDP-11/73 on IRC, using a TeleVideo 955 terminal.

    https://i.imgur.com/ZBZjQQc.png

    Edit: This is using 2.11 BSD's networking stack. Not some...
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    Otrona Attache 8:16 Technical Manual

    Hello.

    I'm looking for a scan of the full Otrona Attache 8:16 technical manual. Bitsavers has a scan of the "Theory Of Operation" chapter of the manual, but the information that I am seeking is...
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    Thank you so much for all of this excellent...

    Thank you so much for all of this excellent information!

    Is the black "Commodore PET" cover stuck to the front with adhesive? I don't want to remove it if it's potentially destructive, but if it...
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    Interesting! I tried searching for a write-up, or...

    Interesting! I tried searching for a write-up, or any sort of reference to the cutouts yesterday but came up short. Do you happen to have a lead on that write-up?
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    Commodore PET 2001N Mystery Cutouts

    I brushed the dust off of my PET 2001N today to take some pictures of it for reference. I noticed that at the top of the housing there are some brass ferrules embedded into the plastic. As I...
  6. Otrona Attache Mystery Mod and Repair

    I picked up an Otrona Attache and a box of parts at VCF-MW this year. Unfortunately the Otrona is missing the back cover and power supply, which I'll have to track down at some point.

    I have a...
  7. I figured it out and forgot to update the thread....

    I figured it out and forgot to update the thread. Making a note for anyone else that has the same issue.

    By default, the system console driver will add a "fake" parity bit to any characters sent...
  8. So it looks like I can get some semblance of...

    So it looks like I can get some semblance of normal output at 8N1 by executing "stty litout". The only problem now seems to be that a carriage-return is not generated with new lines. Minicom lets me...
  9. Change 2.11 BSD /dev/console Parameters?

    Hello!

    I picked up a PDP-11/73 at VCF-MW this year and installed 2.11 BSD using VTServer. My terminal emulator works fine connected at 9600 8N1, but as soon as init runs /dev/rc a change occurs...
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    Oh, sweet! So could I use any software that...

    Oh, sweet! So could I use any software that supports the Transcopy board, or would I have to use a much earlier version? I'd also really like to preserve whatever is on this hard drive before...
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    Mystery 8-bit ISA Card

    Hello!

    I recently acquired an IBM 5150. The seller only provided the machine itself, with no additional software or peripherals.

    The machine has a pretty straight-forward hardware setup. Stock...
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    All of the voltages on the system board looked...

    All of the voltages on the system board looked good. I only ever saw the 5V rail dip down to 4.9V during my testing, though to be fair that was before I put the new ST-251 in the system. I'll see if...
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    So, new problem. I created the media as described...

    So, new problem. I created the media as described in the KayPlus manual, but the KayPlus ROM does not recognize it. KPCNFG83.COM sees the disk I created as a valid KayPlus system disk, and lets me...
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    I tore down and de-oxed the old ST-212 drive...

    I tore down and de-oxed the old ST-212 drive (without opening it, of course) that the K10 came with. Initially, the drive was working perfectly outside of the system. I was able to format the disk,...
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    I tried formatting the first few sectors and then...

    I tried formatting the first few sectors and then immediately running CHECK.COM, but it still reports a NID error.



    I sent David an email earlier today with an inquiry on the availability of a...
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    How would I determine if the sector header is...

    How would I determine if the sector header is unreadable? Is there a more in-depth diagnostics tool available? If the drive is toast, what would be the chances that I could repair it? Could I replace...
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    Quick update. I found a disassembly listing for...

    Quick update. I found a disassembly listing for PUTSYS.COM. I used DDT to insert code that loads the error register at port 81h into the A register when it displays "DISK WRITE FAULT".

    When it...
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    Alright, so I finally got around to working on...

    Alright, so I finally got around to working on the Kaypro today. I ran FORMAT.COM on user 13 and took a picture of the screen.

    https://i.imgur.com/jDvZbRo.jpg

    Only one error. I was getting ~30...
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    Those are the steps I followed exactly. It finds...

    Those are the steps I followed exactly. It finds about 20 bad blocks and then asks if I want a second pass, which I decline.



    I'll try to document the bad blocks when I get a chance.
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    Kaypro 10 CP/M 2.2H Reload Issues

    Hello! I recently acquired a Kaypro 10 "83". I'd like to get put a KayPlus BIOS in it, but in order to do that, I need to get a working load of CP/M going first.

    The machine was shipped to me with...
  21. I can't find much information on the Hercules...

    I can't find much information on the Hercules compatibility of the TL/2. It looks like it might actually require a TTL monitor when in that mode, but the Tandy monitor might double as a TTL monitor....
  22. Yes, the Tandy BIOS is special. The system...

    Yes, the Tandy BIOS is special. The system actually has DOS in ROM, so it boots to that (extremely quickly) by default. You can run a utility to modify the EEPROM flags to boot to the C drive...
  23. Graphics wise, the Tandy Graphics Adapter is...

    Graphics wise, the Tandy Graphics Adapter is pretty much an upgrade IBM PCjr graphics adapter that should be backwards compatible. The TL/2's graphics adapter supports a monochrome 720 350 Hercules...
  24. It looks like moslo will work just fine. There...

    It looks like moslo will work just fine. There are a bunch of other utilities listed here: http://www.oldskool.org/guides/oldonnew/resources
  25. Tandy 1000 TL/2 System Looking For A Good Home

    I have a Tandy 1000 TL/2 system with the monitor, keyboard, mouse, and joystick. I also have an ISA NIC installed (not pictured) and set up to work with mTCP.

    The hard drive does not have any bad...
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