The Amiga Future Archive DVD #6 has now been released to buy.

Order now: https://www.amigashop.org/product_info.php?products_id=473

These are professionally mastered discs, so they include a colour image printed onto the upper surface of the DVD9 disc which contains over 8 GB of data. Even though it might not be a problem in principle, please make sure that your optical drive can read DVD9 discs.

You will also require a PDF viewer that can read at least 1.5 of the PDF standard.

On this Amiga Future Archive DVD #6 you will find the following issues of the Amiga Future magazine as PDFs:

German: Amiga Future issues 11 - 170
English: Amiga Future issues 67 - 170

The issues 11 to 26 have needed to be scanned as the original articles text and image data was no longer available, which is not ideal, but was the only way to include these issues. So, unfortunately, their quality is not exactly perfect.
However, all the other issues, both German and English are actually very high quality PDFs.

Issue 11 was the first German Amiga Future issue that was published.
Issue 67 was the first English magazine of the Amiga Future.

So there are over 25 years of Amiga Future history on this DVD.

Sadly there is no way to offer an update option for purchases of earlier versions of the Amiga Future Archive DVD, which we trust you will understand.

There is now also a USB add-on for the Amiga Future Archive.

https://www.amigafuture.de
https://www.amigashop.org
http://www.apc-tcp.de

Just checked again, ziptest shows the same output after exchanging U850 with U852.

Great, that likely isolates the issue to something specific to U850 and U851, as ZIPtest specifically shows errors for those, and U852 to U857 as good.

74FCT245

I don't know if a FCT245 will work in that location in place of F245, I've seen problems with exactly that in A4000.  Timing is subtly different between those part variants, and that area of the A3000 is particularly sensitised to timing differences.  That's the reason I suggested the 74F245, the same as the original.

my A3000 Bank 0 showed up one time and system/mouse frozen right after, Workbench bar had 2MB + 4MB

That intermittent behaviour suggests you might be looking at possible IC socket contact issues.  And that could also explain the inconsistent test results you're seeing with ZIPtest.  Column address strobe 0 is the one signal that's common to both U850 and U851.  With the system in the faulted state, check to see if you have a valid address strobe signal at U850 and U851 pin 2.  The signal to expect is a pattern 4 x low-strobes, which should be there all of the time under all system conditions.  I've explained this signal behaviour to death in other threads, start with this one.

If it's missing, then there's a good chance you have intermittent contact issues in the U890 socket (PLCC84 device).  In which case the solution is to replace the U890 socket, though you might like to start with cleaning all of the leads on the existing U890 IC, which might be enough.  Use a single wipe of a fibreglass brush to remove surface oxide, then wipe with isopropyl alcohol on a soft cloth or paper towel.  Be sure to use a PLCC extractor tool to remove the IC from the socket, else you'll likely crack the socket, after which it'll definitely need to be replaced.

Always nice to see more NZ people on the forums, I'm based in Christchurch.
I tend to focus on national/international hardware repair jobs and support, contract/commercial Amiga hardware development work, and a bit of 68k software development.  I'm not particularly interested in games, the Amiga is mainly a work machine.   My website, which never gets enough attention from me, has been continuously running on an A4000T for nearly 25 years: http://amiga.serveftp.net/sysinfo.xgi

Hi. My friend Edwin told me about you over the weekend and sent me a link to your site. He mentioned a scan doubler in your past. 

It's great to see the site being hosted on an A4000.

Do you write software for yourself or for others too?

The last Amiga group in NZ I was aware of, Amiga Auckland, hasn't been around since 2022, after one of the main committee members passed away.  Someone in Auckland still looks after the club software/document library, I can find contact details if interested.

Thanks. I'd like to get in touch with groups currently running, or perhaps with people open to starting a group. Seems like low odds, but I live in hope.

Apparently there's a NZ Fascistbook group, I get contacted by them for repair jobs.  Not sure who's on there or the topics of discussion, I don't do social media.  Not aware of any physical meetups nationally either.

I joined it, but don't really use FB much. I probably should pay attention or ask on there about locals too I guess.

Not sure about trying to do software development on an unaccelerated A500.  While it's possible, the lack of a decent source code editor would be painful.  I use CubicIDE myself, mainly for C and ARexx, though you'd need an expanded system to run that.

I've heard of Cubic's predecessor GoldEd, but used Cygnus Editor back in the day.

I can imagine needing a more advanced editor/IDE for C, but for assembly, I like DevPac and AsmTwo.. I'll look into Cubic if my needs get more advanced. I sort of have Visual Studio Code on my Mac, but with Microsoft adding copilot into everything including Paint and Notepad, I'm losing confidence that documents I write or load into modern software won't be injected into an LLM. :/

What was the result of exchanging U850 and U852?  Did the fault result of ZIPtest move with the moved DRAM, or did it stay in the same U850 physical location?

Just checked again, ziptest shows the same output after exchanging U850 with U852.

I'm not sure what you've ordered, do you mean you've got new replacement 74F245 ICs on the way?

74FCT245

You could diagnose further with a logic analyser, but it's a very tedious process to set it up then interpret the results.  Sorry, I've not got enough time (or patience!) to describe exactly what to do over dozens of forum posts.

...

If you have a digital scope, it's easy to see if the octal transceiver U891 is writing data to the DRAM data bus (RD 0:7 on the schematic).  If you're not sure what you're looking at, the correct signal of what to expect should be on U892 (RD 8:15 on the schematic).

good point, I will do that

PS: my A3000 Bank 0 showed up one time and system/mouse frozen right after, Workbench bar had 2MB + 4MB

Always nice to see more NZ people on the forums, I'm based in Christchurch.

The last Amiga group in NZ I was aware of, Amiga Auckland, hasn't been around since 2022, after one of the main committee members passed away.  Someone in Auckland still looks after the club software/document library, I can find contact details if interested.

Apparently there's a NZ Fascistbook group, I get contacted by them for repair jobs.  Not sure who's on there or the topics of discussion, I don't do social media.  Not aware of any physical meetups nationally either.

I tend to focus on national/international hardware repair jobs and support, contract/commercial Amiga hardware development work, and a bit of 68k software development.  I'm not particularly interested in games, the Amiga is mainly a work machine.   My website, which never gets enough attention from me, has been continuously running on an A4000T for nearly 25 years: http://amiga.serveftp.net/sysinfo.xgi

Not sure about trying to do software development on an unaccelerated A500.  While it's possible, the lack of a decent source code editor would be painful.  I use CubicIDE myself, mainly for C and ARexx, though you'd need an expanded system to run that.