ZZ9000 screen glitches in scan doubler modes

[HomeLate]

I’m experiencing screen glitches in scan doubler modes. It’s no issue in RTG-modes.

• Amiga model: 4000D
• 680x0 CPU: TF4060 with full 68068 running stock
• RAM Configuration: 256Mb from the TF4060 + 16Mb fast + 256 ZZ9000 ram
• Kickstart, AmigaOS Versions: Kickstart 3.2.2.1 and AmigaOS 3.2.2.1
• ZZ9000 Firmware version: 1.13
• ZZ9000 Driver version: 1.13
• Monitor model: any monitor
• Other Zorro cards: Re4091 with ZuluSCSI RP2040, X-Surf 100

Link to video: https://youtu.be/nbWHPz173fw?si=lGMRgeNryMVwqnWF

This is not only in sysinfo, but also games and demo’s.

The glitches are not present when I use the video out on my Amiga connected to an OSSC.

[minute]

Hi, I’ve made some frame grabs from your video. I’m not 100% sure what’s going on there, but could be that there’s intermittend loss of HSYNC signal due to EMI to the scandoubler cable, for example. Did you check that this glitch is not in the original video of the Amiga? (i.e. when connecting a 1084S monitor in parallel).

Which revision ZZ9000 is it, how long do you have it and is this a new issue or did it happen before? Any other hardware changes related to it?

[peo]

Try older firmware, down to 1.3 or similar…
Maybe not related, but I still have issues with the scandoubler on the A2000

ZZ9000 flicker fixer image quality problem on Amiga 2000

If you want to ask a technical support question, please include the following details. If not, you can delete all of this text. Amiga model: Amiga 2000 r6.2, 680x0 CPU: 68030 RAM Configuration: 128MB + 1MB Kickstart, AmigaOS Versions: KS 47.111, WB 3.2.2.1 ZZ9000 Firmware version: all public available tested ZZ9000 Driver version: as needed for the firmware Monitor model: Dell U2412M and other Other Zorro cards: Olga, Oktagon 2008 (and with both removed) Long story short: Amiga 2000 r6.2, KS…

[HomeLate]

Hi,

This is a new issue. I made some changes to my Amiga configuration but unfortunately I cannot remember if I had the glitches before. The changes I made:

• I changed from a BFG9060 to a TF4060 because the BFG had SCSI issues
• I reinstalled a Re4091 with a ZuluSCSI RP2040
• I removed a Buddha IDE Z2 interface card

I used a regular Dell monitor before but I start using Checkmate’s new monitor two weeks ago after I received it.

I now connected the Amiga’s native RBG video port to the Checkmate’s internal scandoubler (Appy’s scaler). I made a new video, switching between the Checkmate monitor’s internal scandoubler and the same monitor’s HDMI port. When I switch to the Checkmate’s scart port, the glitch isn’t visible. When I switch back to HDMI, you’ll notice the glitch: https://youtu.be/5P-xXGzIgis?si=ckG3w84q7k5ta1RB

My ZZ9000 was ordered on 04-12-2023 and shipped on 25-03-2024. I’m not sure which revision I have but I think it’s a rev 3, blue PCB.

[HomeLate]

I did some further investigation today and removing the Re4091 from my setup, solves the issue.

So I can conclude the ZZ9000 and the Re4091 don’t like each other in the same configuration. Since SCSI is a lot faster than IDE, I leave it in there for now and use the native Amiga with the internal scaler of the Checkmate monitor.