Atari STe 1040 trashing UltraSatan SD card

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zChris
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Atari STe 1040 trashing UltraSatan SD card

Post by zChris »

Hello,

Got an Atari STe 1040 that is unable to correctly partition a SD card in a UltraSatan. I partition it but when it reboots it doesnt see it. It also has trashed content of folders for example, i started devpac and made some preferences changes and saved it, now the devpac folder is empty.

So i guess this is a DMA issue. I have exxos PSU and a 68HC000 processor that troed was so kind to donate but the problem still exists.

If i have understood it correctly my next step is to add a pullup om the DMA buss? I have checked the mandatory fixes page but are still a bit unsure. So i wanted to confirmt that it is this that i should do

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/zChris
Steve
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by Steve »

Yes this is the next logical step to take.
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stephen_usher
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by stephen_usher »

Indeed. However, the UltraSATAN (at least the Lotharek one) pulls the ACSI bus *hard* to 3.3V and some DMA chips just can't handle this.
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by exxos »

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ijor
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by ijor »

stephen_usher wrote: Thu May 19, 2022 1:06 pm Indeed. However, the UltraSATAN (at least the Lotharek one) pulls the ACSI bus *hard* to 3.3V and some DMA chips just can't handle this.
Do you mean strong pull-ups? It is surprising as there doesn't seem to be any pull-ups at all in Jookie's original US schematics, just voltage dividers. But, I don't know, it is possible that Lotharek made some changes. Or do you mean something else?
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by rubber_jonnie »

Out of curiosity, what driver are you using?
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by stephen_usher »

ijor wrote: Thu May 19, 2022 4:50 pm
stephen_usher wrote: Thu May 19, 2022 1:06 pm Indeed. However, the UltraSATAN (at least the Lotharek one) pulls the ACSI bus *hard* to 3.3V and some DMA chips just can't handle this.
Do you mean strong pull-ups? It is surprising as there doesn't seem to be any pull-ups at all in Jookie's original US schematics, just voltage dividers. But, I don't know, it is possible that Lotharek made some changes. Or do you mean something else?
I don't know why but the data lines are pulled strongly to 3.3V if the UltraSATAN I have isn't driving them.

Putting a 2.2K resistor to +5V doesn't shift the voltage at all, not even a centivolt, so whatever is pulling the lines to that value is very strong. Goodness knows how much current the DMA has to sink to pull them down for data transfer.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by exxos »

@stephen_usher Maybe they are just zener clamped to 3.3v ? Even so that wouldn't be good for the STE which has driver chips :roll:
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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 ?
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People should find solutions to problems, not find problems with solutions.
zChris
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by zChris »

exxos wrote: Thu May 19, 2022 2:03 pm Try this program https://www.exxosforum.co.uk/forum/viewt ... ?f=25&t=43
Tried this program and only got * which was good i think. Run it for like 20 minutes.

UltraSatan and card is OK since i can partition it with my H4 board and it reads it correctly on Atari STe. Its when its writing that its a big chance of corruption AND it doesnt work to partition the SD card with ATari STe. Using HDDRIVER 11
zChris
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Re: Atari STe 1040 trashing UltraSatan SD card

Post by zChris »

rubber_jonnie wrote: Thu May 19, 2022 4:53 pm Out of curiosity, what driver are you using?
Using HDDRIVER 11
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