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Amiga community support ideas / Re: AmigaOS 4 Monthly Roundup - January 2023
« Last post by AmigaSource on February 03, 2023, 01:37:31 AM »
@AmigaOldskooler

  I'm sure I'm not alone when I say we all really appreciate the work you put into you site!! Keep up the GREAT work!

  Now if someone would do the same thing but for 3.x.... ;-)

Scott P
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As I wrote, the floppy drive clicks,it detects when I put a floppy in, the floppy get's read, the cracktro runs (red sector in this case), I can here the music, I can click the left mouse button to end the cracktro and then the game get's loaded.

Literally everything works except video output. And I've ruled out DENISE already by swapping it with the one from another machine which works.
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Amiga Hardware Issues and discussion / My Amiga Syquest Disk - What to do?
« Last post by MrVotar on February 02, 2023, 09:06:39 PM »
New member, first post -- and ancient Amiga owner.   

I only recently attempted to revive my old Amiga machines.  I've got my original A1000, a 'Toastered' A2000, and my wife's A1200...   So far, the A1000 turns on successfully, so does the A1200, but the A2000 just dies immediately after I flipped the power switch.  What I really want is all the files (animations, lightwave scenes etc) that lived on my A2000's hard drive.    So just today I found an old Syquest SCSI drive AND a cartridge labelled "Amiga Safety".   So my question is:  if I connect that drive to a Mac running an Amiga emulator, will it 'see' the Amiga cartridge-drive?   And if not, what's the best way for me to access Amiga content that's 'marooned' on a Syquest disk?   

I was also thinking, maybe I can put the A2000 hard-drive in an external case to see if it still works... but what then?

Lastly, I have a Mac diskimage or ".dmg" of the Amiga Syquest disk.  The mac can't read it, just says "no File System found".  But does anyone know of a possible method to 'read' that .dmg file?

So many questions... But please be warned: I am a total newb, I know nothing about programming or soldering or hacking or taking computers apart.  Dumb it down for me as much as you can.  Looking forward to any insights y'all can provide.
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Amiga Hardware Issues and discussion / Re: Kickstart advice please
« Last post by AndyFC on February 02, 2023, 05:26:12 PM »
Kickstart 3.1 is much better than 2.x. If you want the latest versions, there is also 3.2 which was released nearly 2 years ago, 3.2.1 (generally a bug fix of 3.2), and version 3.2.2 is imminent. Amiga OS 3.2.x will run on Kickstarts 3.1 upwards.
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Amiga Hardware Issues and discussion / a600 floppy drive accident
« Last post by 9a-sabb on February 02, 2023, 01:35:02 PM »
Hello everyone !

I have an Amiga 600HD. During the last year I took out the RF modulator, changed the capacitors, put in a CXA2075M video encoder, added 1MB of CHIP memory + RTC. I have a PCMCIA to CF (SD to CF) adapter. The original floppy works, but I put inside the modded SONY. Boot is from the IDE CF adapter. Kick 3.1.

Everything worked flawlessly.

Recently I was cleaning the case. I took out the motherboard and disconnected everything from it. When I was putting the Amiga back together, I unfortunately turned the floppy drive power cord in the wrong orientation ( :-\ :-\ :-\). The Amiga was on for a maximum of 5-7 seconds until I noticed a burning smell (I almost died). The result was a burnt 12 V trace on the underside of the motherboard near the main power connector.

I repaired the board, checked the voltages (all ok) but now the floppy drive does not read or write.

The floppy drive clicks as you would expect from an Amiga. It reacts to changing the diskette. It tries to boot from the diskette on power on. It tries to format diskette. I have the feeling that the head does not move beyond the starting position. In the Amiga Test Kit, on the head movement test, I only get a clicking sound as if the head is trying to move but ultimately stays in the same position.

Everything else on the Amiga works as before (Thank god!).

CIAs pass the test in Amiga Test Kit 1.20.
The floppy drive works in another Amiga.

It is interesting that the original drive does not show any signs of life when connected, unlike the modded SONY.
The original drive makes a soft click only when I power off the Amiga.

I checked all the traces from the floppy connector to the chips and everything is fine. Not a single chip overheats.

Therefore, has anyone had a similar "problem"? How and what to test? CIA, GARRY? I don't want to change CIAs places unless absolutely necessary.

I appreciate any help.
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does the floppy drive click when its switched on? have you tried a modulator?
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Hi!

I have an Amiga 500 board revision 5, which doesn't have video output. If I connect it to a modern flat TV via a scart cable, I get a "No Signal" message and I'm trying to figure out what's wrong.

I have a second A500 with board revision 8a and that one works fine.

So this proves there is nothing wrong with the PSU, the TV or the video cable.

I also have an old Amiga CRT screen and if I hook up the rev. 5 computer to it and power it up, the following happens:

The floppy drive starts clicking, waiting for a disk to be inserted.
Once I insert a game disk, it gets loaded and after a few seconds the cracktro could be heard on the speakers.
I could press the left mouse button to skip the cracktro and the system is continuing to load data from the disk.
The screen however stays blank the whole time. The caps lock key lights up the caps lock LED.

So this proofs at least basic functionality of: CPU, clock crystal, RAM, Paula, Fat Agnus

I've tried the same CRT with the rev. 8a board and that one works. So any weird issues with the screen are ruled out as well.

AFAIK the CIA chips don't deal with video at all, but as they are easy to swap I did to rule them out as well.

Now my main attention fell on DENISE, which is doing all the video stuff. However, I swapped it with her counterpart from the rev. 8a board (which despite being a A500+ had the same main version number printed on it) and the rev. 8a board still works and the rev. 5 board still has the same symptoms. So that's ruled out as well.

It could be an issue with the SCART connector, but I tried the mono out and that doesn't work either. So the SCART connector could be ruled out as well.

On the board, I wasn't able to visually find any leaked caps (besides AFAIK that is more an issue with the A600 than the A500).

I measured the surface temperature of all big chips on both boards, plugged them in and turned them on, waited 10 minutes and measured it again. None of the chips got unusually hot. GARY stayed quite cold, but that happens on the rev. 8a board as well, the others warmed up slightly (except the ROM chip of course).
So nothing noteworthy here either.

I also tried the floppy drive in the rev. 8a board and it works.

I'm at a point now where I'm running out of ideas.

Any suggestions on what's left to possibly be the root cause and how to nail it down to that?
Did I overlook something?
Did I rule something out which I should not have?

I could try swapping more chips between the two boards, but I've ruled out all of them as possible culprits already, so I'm not sure if it is worth risking to bend and break pins on them (yes, I do have a chip puller, but still there is a risk...).

I will try to visually inspect the board for damage. I was thinking of checking with my multimeter whether the chips all get power, but I don't think this will reveal much. The chips get warm, so they do seem to receive power alright.

I do have access to an oscilloscope in a local hacker space, but I haven't used any oscilloscope yet, so I would either require someone to help me or learn how to use it on my own. But that might be an option if everything else fails.
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Amiga Hardware Issues and discussion / Re: Kickstart advice please
« Last post by RetroPassion on February 01, 2023, 09:52:15 PM »
3.1 :-)
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Amiga community support ideas / AmigaOS 4 Monthly Roundup - January 2023
« Last post by AmigaOldskooler on February 01, 2023, 09:09:09 PM »
Hi everyone,

Today I published the 13th edition of the AmigaOS 4 Monthly Roundup:

https://amigaos4gaming.wordpress.com/2023/02/01/amigaos-4-monthly-roundup-january-2023/

Hope you'll enjoy it!

Cheers!
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Amiga Hardware Issues and discussion / Kickstart advice please
« Last post by centrespot on February 01, 2023, 08:21:09 PM »
One of my A600's has a hard drive fitted but the kickstart is a 391304-01 V2-05 and I've read on this forum that it doesn't support hard drives over a certain size.

I'm thinking of buying a new kickstart chip but would like some advice on whether it's better to buy the 2.0 or the 3.1
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