Jump to content
Have You Played Atari Today?
2600|5200|7800|Lynx|Jaguar|Forums|Store  

dustfilledhobo

Members
 View Profile  See their activity

  • Content Count

    216

  • Joined

  • Last visited

Posts posted by dustfilledhobo

  5. Posted

    The keys themselves are almost exactly 10mm thickness so, even without protection, the added thickness of the envelope paper would put them over the 10mm limit for letters. Meaning I'd have to send it as a parcel. The end result is that it would be about $18US total (including the cost of the keys). The only plus side of that is delivery is 3-10 days.

    Thanks for checking, but that's too much for me. Too bad we don't live closer to each other.

  7. Posted

    I was trying to figure out what your first cable might be useful for. It can't be used with a VIC-20 as it would tie Video Low (composite video) and +6V in a similar fashion that you tied Video and +12V on the TI-99/4A. It can't be used with a Sega Genesis as it would tie Audio with +5V and on the other plug connect the Green component of RGB instead of composite video.

     

    Perhaps an audio application. I see on Pinouts.ru that pin 1 usually refers to left channel and pin 4 to right channel. If it was a tape recorder, tuner etc outputting a stereo signal to a mono amplifier, perhaps they would tie the two pins together, and then accepting a mono input return on pin 5 (right channel).

     

    In any case, good that you solved the mystery and no equipment got damaged! I usually always check unknown cables before plugging them in to be sure. Of course if you got it in a computer lot, you may have expected it to be custom made for the computer but don't trust anyone as they say.

    Yeah, I'm going to check the pinouts of all my cables before using them in new applications from now on, even if I think I know their intended use. Thanks for your help!

  12. Posted

    Is it a custom cable for computers, or some general purpose cable? I believe in some audio applications, pins 3+5 and 1+4 might be wired in those pairs.

     

    I don't know what effect it would have on the C64 to wire together luma and composite video outputs, perhaps a washed out signal. I would avoid to wire together the audio out and audio in as it might damage the SID, but perhaps it doesn't do anything bad.

     

    On the TI-99/4A in that case you would be wiring together audio and N/C which should be safe, but also wire together composite video with 12V that probably not is a good idea either for the monitor or the computer.

    I bought a C64 lot locally (C64, monitor, disk drive, games, etc.) and this cable came in the lot. It looks mass produced, so I think that it isn't custom, but it is possible that it wasn't intended for a C64 specifically.

     

    It has 1 yellow and 1 red RCA connector and a 5 pin DIN on the other side. The first odd thing about it is that the yellow is AUDIO and the red is VIDEO (definitely not the standard in the US.... maybe elsewhere?).

     

    Anyway, I haven't had time to build my custom cable, but I did a quick check with my multimeter and got these results:

     

    The audio RCA is grounded correctly and the tip is connected to the audio pin like it should be, however, the video RCA connector connects to both the video pin and the 12V pin (I'm lucky nothing got fried!)

     

    So that means on the C64 the composite video and S-video luma are connected when using this cable... it doesn't seem to have that bad of an effect on it, but I'm more of a sound guy than a visual guy anyway... so I probably wouldn't notice a difference.

     

    ah cool. so I could add this to my small compendium :)

     

     

    attachicon.gifGENEVE-9640-&-TI-99-4A-&-MONITORS-PINOUT-v16.pdf

    That's a cool little sheet you have there... I might hold on to this.

  13. Posted

    http://www.mainbyte.com/ti99/hardware/cables/cables_page.html

     

    Sent from my LG-H830 using Tapatalk

    Thanks! I'm leaving this here so I can find it easier:

    m_cable.jpg

    Is it a cable with 2 or 4 RCA connectors? Do you have a multimeter or other continuity test equipment to ensure that each pin on the DIN only leads to max 1 RCA plug, except pin 2 that is ground and should lead to the outer shell of all RCA connectors?

    2 RCA connectors. I never thought about multiple pins being connected to the same RCA connector (either by design or through a short), I'll test the cable with my multimeter when I get home today. Thanks for the suggestion!

    • Like 2

  14. Posted

    the TI is weird about the AV cable you use- it might be wonky for the TI (but works ok for the C128).

     

    Interesting, the pins according to the diagram below suggest it should work, but you're saying that a faulty cable might work on a C128/C64, but not the TI-99/4A.

     

    So the TI-99/4A is more particular I guess?

     

    I think I'll just build my own cable using the diagram below. Can someone please verify that these are correct? Thanks!

    7896.png

     

    Sounds like a bad cable to me maybe incompatible

     

    Sent from my LG-H830 using Tapatalk

     

    Thanks for the quick reply

    • Like 1

  15. Posted

    I'm very new to the TI-99/4A so please bare with me.

     

    When I use the RF Box to connect my TI-99/4A to an old TV I get a picture and everything looks "great" (the picture quality of both my TVs is a little distorted, but that's no fault of the TI-99/4A), however, when I connect the TI-99/4A to a Commodore 1702 (in the front) using a 5-pin din to composite video/audio cable I can get sound, but no picture (black screen).

    I've tested the cable with my C128 and it works great and I've also tried another non-commodore monitor that I own that only takes composite video/audio.

    One more thing, when connected to the RF everything acts normal, but when I connect using the composite cable, the computer often gets stuck on little intro beep of the TI-99/4A. It almost sounds like an old telephone ring, with no breaks in between the rings. Other times, (when hooked to composite) it seems to operate normally (as far as I can tell with out being able to see the visual output).

     

    Any suggestions as to what I'm doing wrong or what I could try to fix this? Thanks!

  18. Posted

    Hello,

     

    I use non-working floppies for various art projects. Does anyone have a box of non-working 5.25" floppies taking up space that I could have for free or cheap? I need at least 100, but since I use them fairly often I'd be interested in more as well. Thanks!

     

    Joshua

  21. Posted · Edited by dustfilledhobo

    If I look at the aesthetic overall, I love how everything looks in this show. I know there are mistakes, but I still get excited when I see a bunch of people playing games online using C64s. I'm not that interested in the story to be honest... it feels like a re-boot of Mad Men set in a different time period and in a different industry, but the drama and self-destruction of the main characters is the same (imho).

     

    Anyway, the best part of the show is the theme song. Here's a link, just in case you haven't heard it: https://www.youtube.com/watch?v=Cd85t-ph7s4

  24. Posted

    i've just released a little demo that plays a one channel tune (the "idle" music from Microprose Soccer on the C64 by Martin Galway), displays a picture converted with my own tool which is still in beta and has a line of cycling text at the top of the screen which is for greetings and so forth. It looks like this...

     

    septic-a2.png

     

    ...and can be downloaded from the Cosine website. It really isn't anything special, but does strap a sequencer onto Carlsson's upgrade of the tone generator which started this thread and the source can be downloaded from the Github repository if anyone wants to prod around.

    That's pretty cool!

AtariAge
Forums
Store
General
Follow AtariAge

Copyright ©1998-2021 AtariAge

×
×
  • Create New...