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Mehridian Sanders

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Posts posted by Mehridian Sanders

  3. Posted

    On 12/14/2019 at 1:38 AM, wierd_w said:

    Grab a copy of VLC, and play the tape's .wav file with the volume turned all the way up past 100% to 130%. Connect the tip leads on the record and play connectors, since there is an open ground loop on the TI, and there is a ground noise hum unless you connect them together.  Load the tape into the TI's memory with OLD CS1, then connect the program recorder, and save it from the TI.  This assures that proper output levels are sent to the recorder.

    ok. So I just got some Wumpus time in and it was grand. Now I have this program recorder. So to connect Mic and Speaker Connection tips, just connect the shielding from each line to one another?

  4. Posted

    On 12/10/2019 at 7:20 AM, FDOS said:

    I also have a USB adapter in my TI-99/4A console, so I use a 4 port KVM to select it or one of two Win 7 Pee Cees I use in support of my TI hobby (MAME emulation, TI99Dir, TI99Hdx, etc..

     

    RETRO Bill

    somehow I missed the first part of this post. Do you a link for that USB upgrade? I was thinking earlier today that a OTG USB connector would solve a lot off incompatibilities.

  7. Posted

    No he says it's just a Rs232 port in the corcomp

    And the other box is 32k

     

    They were sold without the card that had the disk controller and 32k on it. Likely never had it

     

     

    Sent from my LM-G820 using Tapatalk

     

    Ok, now I see. Of the 2 boards contained in the Cc9900 the upper board housed the 32k and the disk controller while the lower board housed the sidecar connectors and the RS232 port. It was sold without the upper board. Well, can't win them all. At least it would give me some space to make my own disk controller atariage_icon_smile.gif

    Thanks guys for informing me proper. Yanno this is a solid group. Looking out for one another. I haven't seen this often in the real world. I am glad to see it here!

    Sent from my SM-G955U using Tapatalk

     

     

     

    • Like 2

  13. Posted

    Thanks, I will remember this. Unfortunately, I can't use it. The keycaps (which look very Cherry MX like) only show the pole :( i'd have to de-solder the switch. I tested the keyboard out though. And it will work but my headers come right into contact with the connector. So I get to redo that lol.02233291a8fca7d5a01cc3d7e88ca2b3.jpg

    Sent from my SM-G955U using Tapatalk

  15. Posted

    On 12/26/2019 at 3:12 PM, mizapf said:

    Check this. The columns are supplied with GND level one after another, and the INT lines are sensed by the keyboard scan. So if OIUYP fail, it is likely that pin 1 of the keyboard connector is bad.

     

     

    ok checked my points from pin 1 to enter and U. I. O. P. all are showing a signal of about 1 ohm

    so the signal is still there

    this is of course after the header addition. I am using the end point of the header to check the traces to make sure signal gets all the way through.

    On 12/26/2019 at 12:02 PM, arcadeshopper said:

     

    keyboards are very simple things.. you should be able to troubleshoot with a meter..  if you want to send it to me lmk always need parts

     

    Greg

     

     

    Thanks Greg, you were right they are very simple creatures. I guess I should have a bit more faith in my abilities. Either that or just not go bananasandwich when something new rears its head

     

    • Like 1

  16. Posted

    so wait a second ... since I now have headers on this ... is it possible to split the keyboards function .. add a 10 key pad through USB and use the TI keyboard while in the keyboard with another PC? like make it dual purposed?  Using a teensy 2.0 should be able to use the keyboard while the TI is off for the PC? hmmmmmmmmmmmmmm

  20. Posted

    Note: main chips on both boards are TMS9900s, made between 8301 and 8314 (first and fourteenth weeks of 1983). The number you were looking at is basically just a lot number.
    Thank you. you've given me good knowledge. I have gotten better at Basic Electronics Knowledge (89), I've spilled my beer.

    Sent from my SM-G955U using Tapatalk

  25. Posted

     
    keyboards are very simple things.. you should be able to troubleshoot with a meter..  if you want to send it to me lmk always need parts
     
    Greg
    Well after removing the joystick fix lead U I O P started working again. Enter, R- Shift, and Spacebar are still not working. The Stackpole feels nice just that the keys fall out if the keyboard is inverted. Yeah I think I will send you the Futaba. For parts only, I think one of the pads came off.

    Sent from my SM-G955U using Tapatalk

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