Thanks for your comments. I have changed the RAM modules but the glitches remained visible. The inserted modules have parity chips as well but I wanted to check out another fix before cutting traces. So actually I have replaced the CPU. The old type was an MC68000FN8 and the new one reads MC68HC000FN20.
I ran the demo for more than two hours and everything seems to be fine. I‘ll do another test tomorrow but I think and hope that this has fixed the issue.
PSU related Blitter issues (Atari STE)
- sascha.springer
- Posts: 14
- Joined: Wed Mar 25, 2020 6:56 am
Re: PSU related Blitter issues (Atari STE)
That is awesome news! Perhaps this new chip uses slightly less power or something.sascha.springer wrote: ↑Wed Jul 29, 2020 9:40 pm Thanks for your comments. I have changed the RAM modules but the glitches remained visible. The inserted modules have parity chips as well but I wanted to check out another fix before cutting traces. So actually I have replaced the CPU. The old type was an MC68000FN8 and the new one reads MC68HC000FN20.
I ran the demo for more than two hours and everything seems to be fine. I‘ll do another test tomorrow but I think and hope that this has fixed the issue.
- sascha.springer
- Posts: 14
- Joined: Wed Mar 25, 2020 6:56 am
- sascha.springer
- Posts: 14
- Joined: Wed Mar 25, 2020 6:56 am
Re: PSU related Blitter issues (Atari STE)
Here's a test version of the "Fast Bobs" demo for Blitter equipped Atari STs. Please let me know if there are issues on real hardware.
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- st_bobs.zip
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Re: PSU related Blitter issues (Atari STE)
Sounds like a bus loading issue again, did you try changing the pull ups ?sascha.springer wrote: ↑Wed Jul 29, 2020 9:40 pm So actually I have replaced the CPU. The old type was an MC68000FN8 and the new one reads MC68HC000FN20.
I ran the demo for more than two hours and everything seems to be fine. I‘ll do another test tomorrow but I think and hope that this has fixed the issue.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: PSU related Blitter issues (Atari STE)
It runs fine on my BLiTTER enabled 1040STfm.sascha.springer wrote: ↑Sun Aug 09, 2020 11:12 am Here's a test version of the "Fast Bobs" demo for Blitter equipped Atari STs. Please let me know if there are issues on real hardware.
- sascha.springer
- Posts: 14
- Joined: Wed Mar 25, 2020 6:56 am
Re: PSU related Blitter issues (Atari STE)
At first I wanted to fix the issue with "plug and play" solutions before heating up my solder iron. So actually I did not add the pull ups.
Great! Thanks for the report.