Search found 23 matches
- Sun Jan 10, 2021 11:00 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
So, Ben's video further, he does in fact place resistors on the data bus and create a NOP, placing the resistor in various pull-ups/downs, creating 01010111 or EA, the 6502's op code for doing nothing. I followed suit, well, turns out I must've connected my Arduino in reverse, because I was getting ...
- Tue Jan 05, 2021 8:05 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Yes, the baud rate was wrong, stupid of me, the program even defines the rate I'm to use (57600,) I'll get a pic of the NOP of soon.
I don't have a 32kz oscillator, sadly, I did buy one, but it got lost in the mail.
I don't have a 32kz oscillator, sadly, I did buy one, but it got lost in the mail.
- Mon Jan 04, 2021 10:05 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Ok, so while I'm working on the NOP with one chip (the old one,) I used the spare one I purchased to see if I could get any information from it via an Arduino (connected to the address pins,) once again following Ben Eater's video, I checked over my code 3 or 4 times, it compiled and when I turned ...
- Mon Jan 04, 2021 4:31 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Hello!
I've been reading some of that 6502 cookbook, and my wires came in today. I also managed to get ahold of a few spare parts, including another 65c02, so I'll be looking back through here to see what needs doing.
I've been reading some of that 6502 cookbook, and my wires came in today. I also managed to get ahold of a few spare parts, including another 65c02, so I'll be looking back through here to see what needs doing.
- Tue Dec 29, 2020 7:11 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
I'll see what I can do about getting more wire, I downloaded the book, will spend some time reading. Thank you.
- Tue Dec 29, 2020 4:17 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Your most recent layout photos betray a certain lack of organization. As just one example, you bring Vcc (+5 V) to pin 25 not by using a short jumper from the +5 V power rail directly above that pin row, but instead by using a long jumper to the other side and other end of the chip to get +5 V from ...
- Sun Dec 27, 2020 11:57 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Ah, slight oversight, thank you. It wasn't connected to VSS but it is now. I'm reading around 500 millivolts on the address pins, and I got a 500kHz signal out of pin 7.
- Sun Dec 27, 2020 9:08 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Okay, taking Hoglet's words into practice, I've received signal from Phi2O (which I know is clock output, but it's the only pin I measured a pulse coming from.)
Voltages where higher though when I tested them. Enclosed are photos, as promised.
Voltages where higher though when I tested them. Enclosed are photos, as promised.
- Sun Dec 27, 2020 8:07 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Do I need an oscillator for a NOP?
- Sun Dec 27, 2020 7:12 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Ok, I think I've got it together, I'm sorry it's so crowded, I've only got jumper wires for this, I was getting anywhere from .6 volts to .9 volts when checking the address lines, and my meter nor my scope could get a signal out. I've done something wrong I think?
- Sun Dec 27, 2020 5:32 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
My memory may be lapsing, but no, I don't believe this happened before?
At any rate, I'll build the NOP and provide pictures and results as instructed.
At any rate, I'll build the NOP and provide pictures and results as instructed.
- Sun Dec 27, 2020 4:11 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Hope everyone had a good Christmas!
I decided to retrace my steps in building the computer over the past couple hours now that I'm certain the oscillator works.
As I mentioned before some LEDs were on, and some where off, I've ordered a slower crystal to see if I can watch them change, and I'm ...
I decided to retrace my steps in building the computer over the past couple hours now that I'm certain the oscillator works.
As I mentioned before some LEDs were on, and some where off, I've ordered a slower crystal to see if I can watch them change, and I'm ...
- Thu Dec 24, 2020 9:26 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Ok, so, the oscillator works correctly, tested it with the multimeter, I should've done that from the beginning, would've saved us all a headache, I imagine, my apologies.
But now that it is out of the way, I'd still like to figure out (see quote below:)
(Side questions, using a smaller crystal ...
But now that it is out of the way, I'd still like to figure out (see quote below:)
(Side questions, using a smaller crystal ...
- Thu Dec 24, 2020 9:19 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Ok, guys, I do have a meter that can read frequency, and to be honest, I don't know why I haven't tried it yet, slipped my mind I suppose.
So, I can either use the scope for checking pulled address lines, or the meter for checking the oscillator outright (if it can,) or I can purchase a slower ...
So, I can either use the scope for checking pulled address lines, or the meter for checking the oscillator outright (if it can,) or I can purchase a slower ...
- Wed Dec 23, 2020 10:06 pm
- Forum: Newbies
- Topic: Help: Crystal Oscillator is not working.
- Replies: 59
- Views: 7513
Re: Help: Crystal Oscillator is not working.
Leepivonka, I couldn't find the CPU's clock voltage requirement in its datasheet, but I'm gonna go ahead and try Dr. Jefyll's suggestion, and leave the results in this post.
Ok, so I continued to get around 50Hz measured when I tried connecting 5v to that last pin.
Ok, so I continued to get around 50Hz measured when I tried connecting 5v to that last pin.