hofster

Well done! I haven't tried the dremel method myself but I have soldered donor pins onto the remains of missing pins many times but that's an easy fix compared to having to dremel off part of the package to get to it. One of the problems with buying from China is that they often don't use sufficient packaging. I've received loose chips in plastic bags. I don't know how they expect the chips to survive like that. It is nice to see that you received genuine unpainted parts though.

No, it doesn't have to be done that way. If I had a programmer that could read 2364/2564 EPROMs, I could have used that. The data would still work in a 2764 later because data is just data and the data doesn't know where it's been or where it's going. But yes, I did extract it using the adapter in the article.

Let me know if you do anything with the software or get a setup running. Would be cool to update that blog with some links.

Yes, the discussion was kind of moved from the blog to that AtariAge thread. Maybe I should have updated the blog post with a link to the thread but I forgot about the whole thing. I still have the original cartridge though.

Seems to have been moved into here: https://commodore.bombjack.org/commodore/disks/other/gold-disk/

I wonder how many applications and games has these kind of problems on the SX64 and on 3rd party C64 Kernals with alternate background colors.

I assume that you have tried removing VIC and SID. Anyway, keep them and as many chips as possible out of the board while troubleshooting this. I would continue by removing parts along the path from the 5V rail and on the 5V rail to see what parts are affecting the voltage.

Sounds like something is drawing more current than the power supply can deliver. Is anything getting hot? What's the voltage on the digital 5V rail? Measure VCC on one of the logic chips. Is that also affected when you flip the switch? Have you tried a different power supply?

The 6510 is probably getting more expensive because they have been used as 7501/8501 replacements by the same Plus/4 folks. Hopefully that won't need to continue much longer. I'm not sure how compatible the MOS replacer is with the 7501/8501 though. I've had some problems with them but I'm not sure how genuine my 6502A's are. I will need to test it some more.

The instructions should already be available in the 6502 as long as it's an NMOS version. A 65C02 will kind of work but will not be very compatible as it lacks a lot of illegal opcodes. The extra logic on the MOS CPU replacer replicates the extra i/o port and tri-state mode for the busses.

I'm not sure if they are in production. The NLQHD-SATA is my design but I don't sell it actively anywhere. It doesn't offer any advantage over the SD2IEC except that you can use a proper SATA hard drive (2.5 or 3.5 inch) if that's your cup of tea. You also loose the D64 support. The max usable size is 128GB so you won't get Terabytes of space either. I guess it could support a CDROM too but I haven't even tested that because I don't see a point in using compact discs anymore. Both NLQHD-SATA and the original NLQ-HD (IDE) are open source products that are free to build for anyone. I have parts enough to sell a few controllers if anyone wants one but it would still be a DIY solution without a case.

There are a few more options when it comes to hard drive interfaces such as IDE64, IEC-ATA and NLQ-HD/NLQHD-SATA with different levels of software support. What do you want your hard drive to do? Are you just looking for a storage device with relatively large capacity, then SD2IEC is probably all you need. If you are longing for the whining sound of rotational platters and ticking noise of read heads you the IDE or SATA solutions might be better for you.

Yes, that's what I meant. There are a few projects that replicate the REU functionality (and more). I have tried the below. The REUPlusC2 (FPGA based) is the closest in shape and form as it fits in the enclosure of a true REU: https://github.com/jburrell7/REUPlusC2 The RAD cartridge (Raspberry Pi based) is probably the cheapest alternative: https://github.com/frntc/RAD The 1541 Ultimate-II+ is the most expensive option but certainly the richest in features. Maybe also the most compatible? https://ultimate64.com/Main_products

It doesn't need a memory expansion in general. It needs an REU with at least 256kB of RAM. In Vice settings, go to Cartridges and expand RAM Expansion Module. Pick a RAM size of 256kB or more and leave REU Image empty.

How about Compute's 128 Machine Language for Beginners? https://archive.org/details/128_Machine_Language_for_Beginners_1986_COMPUTE_Publications