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For anyone in the future. R49: yellow, purple, black, gold, 47 ohms R51: purple, green, black, gold, 75 ohms R48: brown, silver, brown, gold 180 ohms R90: brown, green, red, gold, 1.5k ohms R91: brown, brown, red, gold 1.1k ohms R51: yellow, purple, black, gold 47 ohms Remeasured after taking...

Tried again, got one up just fine (only tried one). Was being way too gentle/sensitive at first. Didn't pull or try to warp anything either, so no damage there. More flux, more wick, more time :) Needed to work more around the joint. From the previous post I just hadn't given enough time...

Again too easily convinced after reading again, and wanting to work on this thing since it's sitting on my dining room table in pieces! I desoldered one leg per transistor in that line (R49,51,48,90,91) but either these resistors are glued to the board or years of dust and grime has caused this...

Don't have any replacements, but will buy if needed! Unfortunately my multimeter, fluke 23 doesn't have a capacitance option it seems.. Seems they're decently cheap. 120 of them from amazon for $8...

Still waiting for my new oscilloscope then back to tracking down possible timing issues! Eager to get it in the mail.. I feel bad.. it's sitting in parts on my table! Quite the journey.. many hours of work so far.. I saw your post on reddit and the facebook group. I acctually commented on...

Still waiting for my oscilloscope to come in the mail.. soon! I hope..! By checking for C23, what are you specifically looking for? Signal? Voltage? mhz? Etc I know you said you were able to replicate it. If I may ask, how?

When I get my /// working... I'd definitely be interested in a kit!

Traded in my oscilloscope to try and get a 120mhz one to see if I can get something more accurate/better in general. I was looking at what I'm supposed to get (c64 wise) and it just wasn't up there it seems/measuring well First thing I will do and get back when I get my new one though 🙂 Next...

I'll try out the ZEEWEII DSO1511G from ali $50 shipped with "black friday" deal. Watching the video seems to do 14mhz (which I need for timing tshooting) really well as per adrian. And if it really is 120 then it'll do well as you said for something like the se/30. Posts might be a little...

I tried it on my c64 and it's able to see things on the 6502 at least. Tried on the crystal in there too.. nothing on it. Someone stated earlier it might not produce a signal though when it's probed. But not sure. I've considered returning and buying a Hantek 6022BE It seems well rated. I...

No waveform, thankfully everything is keeping a good voltage. (For the most part..) List of all the R / Q in that line according to the osciliscope. R52 - 1v increase on each side. no wave form. R91 - 5v on left, nothing on right, no wave R90 - 5v on left, nearly 12v on right(?) no wave R48 -...

Is this what you're looking for? R52 is on the bottom where the glare is. Sorry had to go through a magnifying glass because sometimes it's hard to read Seems it is R51 that connects to the 74S86. I'll try and probe each side to see if I can get anything from it later tonight Edit: I...

It is! That clears it up and makes sense. Thank you

Yeah I thought about a bad 74S86. Tried to swap 2 on the board to see if any difference, but a few slight mv is all I really got. Could just be two bad IC though! I checked the legs of the crystal itself. (Post 86 last 2 photos) Not sure it that's truly where it starts or what I'd see from it...

Unfortunately every ic looked like that. They were all sanded down and the legs are clean (now at least) Just the very top of the IC looks wonky usually where the leg connects to the ic because I couldn't clean those too well

As a quick test I swapped B13 with the same IC on the board sitting in E10. Tested all pins before and after and they look identical (aka flat.. or a few mv of movement) From the manual: MAIN CLOCK (C14M) SYSTEM CLOCKS & TIMING The Apple /1/ has as its master clock a 14 megahertz crystal...

That thread makes me sad... I've read it.. guy ended up selling it because he couldn't figure it out.. someone got a hell of a deal because at least video worked! I tested my osciliscope on the 6510 in the c64 to see what it might look like. Along with data buses, address buses etc. Quite...

B13 is a 74S86N So am I reading it backwards then? That B13 supplies data to the clock and not the other way around?

Yeah I tested every pin yesterday. Just included the ones that seemed most important (reset, clock, power, etc) Everything looks the same unfortunately... it raises a little and keeps a steady line. I have to zoom into .1v or millivolts to see any actual movement. Then it's barely anything. I...

I may be using this thing completely incorrectly but here's what I have so far and looking to see if this is normal for the 6502.. Using DC on the scope Using 1v, I can see the line goes proper and straight and stays at 5v. Reference for off the pin 8 I then tested reset pin, when turning...