ReilyReed91218

Was taking some notes about half a year ago when me and buddy were dissecting the Xbox Series X's permissions systems at Lockheed. I'd invented a bruteforcer on the key-ring-bus which eliminated tones of encryption and other things. Not much else to say about it other then the encryption name is HAMKAS. Took notes on the Hex that was there and got to weird NAND Dump. Never releasing, not my material don't want to be sued. Here's just some of the notes I took on it. Broke the XBSX to Hex 6 months ago.

This is my version of LHE's idea for the 7800 S-Video mod schematic. This schematic is just like LHE's but I never understood why there was a transistor buffer circuit in the middle. No testing equipment any longer so I did the math on the Luma values and dropped the resistance of the luma/sync output marginally by 3/4th. You dont need those buffer transistors at all because it's combining with OR Gate, the buffering with Hex, then amplifying/buffering with FMS. It's just about the same as the board on OSHPark, but to quote my OSHPark release of this would better help explain thing I think. So here's the quote. I'll post my board for it after I'm done designing it. If people are still getting issues with the TS5 switching chip, then 'll replace the switching chip with a comparable part and get rid of the TS% TI part. The two other shots above are how a similar shamanistic turned out and the other shot is of my currently placement of the schismatic. after it's done, I'll post both the board and the schematic.

Thanks for the info. I swapped around the inputs on the TS5 switching chip, and that, theoretically, should prevent the need for a switch between TIA pin 9 and the board. Technically, according to the datasheet, the most common connection should be connected to NC (or normally closed) when inputting on the TS5. But I didn't know if output on the 74LS174 Pin 5 was high or low when in 7800/2600 mode. So I needed someone to test that for me. I thought LHE had gotten it wrong due to the datasheet though so I swapped it. Also, you mention Stereo to Mono output. I'd just use a potentiometer, input and output on same pin, to short the connection between stereo and mono. And, just as with LHE's board, you won't get any output on the RF modulator, once the 74LS32 is gone.

Just remembered this piece, there is no 75 ohm termination or pulldown on output of video. I did this, to save space pretty much. If you feel your picture is a tad too bright or needs these resistors. Then, just put the impedance in-line with the output of the board and bend the resistors down between grounding and input on the RCA jacks. Just remembered this revision btw, it was just a few capacitors changed to 1uF and DIP. But, it still was a good revision. Just wanted to post about it. Was slightly different than the latest. AND I also was going to make a DIP version because some of us hobbyists aren't trained in SMD soldering. That to come later. Just need feedback, to see what peoples interest in these Atari boards with schematics that are a little older. Not many alts are made anyways.

If anyone wishes for the EAGLE parts I made for this project, you can find them attached below. If you don't understand the TS5 symbol, then read the datasheet. Still dubios on releasing board or shchematic. But I'll definitely think about it. If anyone could, they could try hooking me up with a manufacturer, don't want to govern or make money from it terribly badly, but it might serve the community. Let me know and do look at the board. I need feedback on it's design. 74_Logic_Series.lbr FMS64XX (contains all FMS derivatives).lbr Texas_Instruments_Logic.lbr

With LHE's board on Electronic Sentimentalities is finally not restocked and apparently not being sold any longer, I decided to design a 7800 Mod Board out of drunkenness since I wanted to mod my 7800, and since LHE's idea of dropping the board into a chip socket was ingenious, I took the idea and ran. This 7800 Mod board will do the same, however, it's SMD. And I noticed a discrepancy when testing an LHE mod board before in the TS5. Which, to sum up, he swapped the two connections on NC and NO of the TS5... I think any ways since I get vertical bars on my other 7800 that uses LHE's board design. So that's swapped. Also, as some may not know the TIA chip is entirely responsible for audio output in the 7800 and there is no MARIA output on sound. So I'm grabbing TIA13 & TIA12 directly from the TIA chip. This also allows for stereo mixing with a pot, and I overlayed the potential for POKEY sound on top of both audio lines with some simple 47K resistors (did no testing but the values should work). This was really just a night project that I designed because I was drunk, bored, and trying to kill an evening. Need user feedback on the board just to see if I should release at all. Thanks.

Just added the Pause mod to circuit. It stores the low/read high/write signal from the TIA/6507. So it's technically storing the instruction to read or write from the 6507. You cannot HALT on a write cycle which is effectively what the 6507 is doing on a low cycle. The added transistor mod I got to work and it amplifies composite not as well as I thought so I'm prototyping new ways of doing that.

thanks for all of the advice. sorry about the two pots, was testing my circuit with a friend and didn't know the values of resistance. Final product won't contain them. This is how I matrixed CVBS with a transistor. Not great. I hate the fact that there's more circuitry involved, but it should work. Constructive criticism wanted. https://imgur.com/zmivV1B

Try reseating the IC's, using deoxit on the switches and ports, and make certain that you're wearing antistatic protection when you're dealing with any old circuitry.

BUT has anyone actually tried this op amp circuit I built? Can someone test it for me and give me some advice on it? Still can't test it myself, have no equipment is why.

So I need an expert in opamps to help me out. Using a 250MHz op amp to amplify Y and C and to matrix the signal into composite. Here's my schematic so far with resistor values that I believe to be correct. Not certain how to configure this for composite. Please do help out. If other could try this, I'd be ecstatic.

NVM using an op amp for composite. Might just redo my design and use op amps instead.

So i am using the THS in the end and it works perfectly and ideas on how to matrix composite through a series of passive components? And yea, she did. Stole all my shit. And sold it. Sorry if that caught you guys off guard.

What an excellent idea, thanks a lot for the info. I know of a different way of amplifying Blanking on chrominance. But I don't really like the idea of doing it that way any longer (using a 3.3k pullup on blanking with 470Ω of termination before chrominance. Anyways, I'll give the THS7314 idea a shot and see if I get better results at all.

Howdy, so basically I've been designing a new atari video mod based around some old schematics and testing the values myself. Unfortunately my girlfriend sold all of my testing supplies, soldering iron, etc for drugs just recently (needly to say I'm done with her) and I can't breadboard the blanking signal amp at all. I was wonder if the community could give me some advice on whats needed here in this picture. Don't know if I got it right because I couldn't finish my design. Thanks everyone. Reily Image wouldn't embed for some reason but here's a picture of the schematic and a circle around where I was going to start testing designs a few weeks ago, but can't any longer https://imgur.com/8kA93VF