Recent content by eight088

is soldered on board or you soldered on board?

Not necessarily. Sometimes it can cause black screen, other times it will just sound terrible if it's bad. Curious though, has removing non essential chips been considered? SID is on address lines 0-4, and data lines 0-7. If it is faulty it might screw with those signals. (I haven't...

You mentioned you tried 3 different PSUs but did you test the PSUs first? C64 power supplies have a bad tendency to over volt on the 5v rail, and plugging in a bad one will damage some of the chips on the motherboard. (In my previous experience, I fried the ram chips so wasn't too bad...)...

Talking about disk drives gave me a theory... Falter, what kickstart version does your amiga 2000 have? If its 2.04 or above, are you booting from df0? If you have two disk drives in the system, or if you have an incorrect cable it might be using your disk drive as df1 which some games dont...

You're correct, you shouldn't need to, but as the wrong connector was used it obviously won't fit. 80186 should either return it to the seller and get an exchange, and hopefully get the correct one, or he can just cut the two top pins as I mentioned. These two pins aren't used, so it's fine to...

It's the wrong type of DIN used. It should be the horseshoe type. It can still work, but you will need to cut the top two pins off. I've done this with connectors I've bought from my local electronics store because they only stock the round type and it's worked fine.

I saw in a previous post that the RF modulator had been removed, and it seems from this point on the video signal is no longer on pin 15 on the VIC? The RF modulator is required to get a signal from the VIC. Maybe resolder the modulator back in and check pin 15 again?

Keep us posted @Desperado! I'm keen to see this working!

Can you disable the LPT port in the bios? That might help rule out that conflict. It's looking to me like the sound card might be faulty though if it's not detected while trying to configure the sound card with irq 5.

Just an update, when I touched C13 the noise went away. I replaced the cap but the noise was still there. I ran a bodge wire from the output of c13 to the audio out on the DIN connector, and it seems to have fixed it! Easy fix!

Hi all As the title suggests, I'm getting a high-pitched squeal from a c64 when it's turned on. It's not the monitor/crt, as the same monitor hooked up to a different c64 doesn't make the noise. Suspecting the SID chip, I removed it and the noise goes away. I put a different SID (from the...

Chances are if you find someone that sells them complete is that they got them built by jlcpcb/pcbway. If someone can make a CPL file, then I'll order some for myself and then I'll finish making it for you and you can have one at cost price + postage.

The gerbers are available on github. You'll be able to send these off to jlcpcb or pcbway (etc) and get them to make the board. If you can make a BOM to go with it, then the pcb maker can do the smd work for you. I'm not sure how to create a BOM for it but I'm sure there are much smarter...

The DS1287 and DS14287 have a small difference that might cause problems. Pin 1 on the 1287 is a bus selection pin, and the 14287 has ram power output. So going of that, I would think it won't work. The one you linked to ebay should work. The github for that replacement can be found here...

I've already swapped them and no difference (post 3). I have a friend who has a retro chip tester so will try and test the memory chips in that and see what happens.