DMA ISSUE ON H4

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PaulJ
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Re: DMA ISSUE ON H4

Post by PaulJ »

czietz wrote: Sun Dec 08, 2019 3:43 pm Hm, the link only leads to a page titled "Atari History and Evolution of Atari Computers- Atari Fans Club" written by whoever snatched atariforge.org. Better try the current page: https://docs.dev-docs.org/htm/search.ph ... A+Integrat
Thanks @czietz for correcting the URL, that was the document I had up when I copied the URL. Guess I should have checked.
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Icky
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Re: DMA ISSUE ON H4

Post by Icky »

So here is an interesting observation. Firstly I made sure my DB19 shield was grounded so as to close that option off and the ACSI buffer removed and jumpered.

In HDDriver 10.14 at boot there are no devices shown and in the HDDRUTIL.PRG the devices window is empty

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However selecting Device Check from the Tools window displays this. However it still doesn't see them in the Device window even when refreshing.

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Icky
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Re: DMA ISSUE ON H4

Post by Icky »

After doing auto configure in the Tools menu it now sees the devices and partitions.

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Icky
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Re: DMA ISSUE ON H4

Post by Icky »

DMA works on the H4 with the ACSI buffer removed and lines jumpered over. Am using UltraSATAN on the DB19, will also try it out on the internal connector.

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exxos
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Re: DMA ISSUE ON H4

Post by exxos »

:WTF: :stars: :stars: :stars: :stars:

Can you check the voltage on the reset line ?
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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PaulJ
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Re: DMA ISSUE ON H4

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I was just going to report success with just jumping ic6 but I guess it worked for Icky to. I thought Icky had tried it without success but I'll have to read back in the thread. Anyway I'm also running with just the IC6 elimination. So the only thing I haven't tried is the glitter. When I check that off everything is working. Only item that needs some attention is the color video which is washed out. Great board @exxos , @Icky .

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Re: DMA ISSUE ON H4

Post by exxos »

:bravo: I will do a bodge PCB tomorrow for the buffer.
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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.
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Icky
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Re: DMA ISSUE ON H4

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PaulJ wrote: Sun Dec 08, 2019 8:32 pm I was just going to report success with just jumping ic6 but I guess it worked for Icky to. I thought Icky had tried it without success but I'll have to read back in the thread. Anyway I'm also running with just the IC6 elimination.
I think my initial test, with IC6 jumpered, of the ACSI nothing showed up in the booting HDDRIVER and in the HDDRUTIL. I shouldn't of assumed it was broken and actually tried to detect and format a new SD. Note to self, when testing ACSI or IDE for that matter start from scratch, format and partition an SD right from the start.
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PaulJ
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Re: DMA ISSUE ON H4

Post by PaulJ »

Icky wrote: Sun Dec 08, 2019 8:52 pm
PaulJ wrote: Sun Dec 08, 2019 8:32 pm I was just going to report success with just jumping ic6 but I guess it worked for Icky to. I thought Icky had tried it without success but I'll have to read back in the thread. Anyway I'm also running with just the IC6 elimination.
I think my initial test, with IC6 jumpered, of the ACSI nothing showed up in the booting HDDRIVER and in the HDDRUTIL. I shouldn't of assumed it was broken and actually tried to detect and format a new SD. Note to self, when testing ACSI or IDE for that matter start from scratch, format and partition an SD right from the start.
Ya, I wasn't expecting it to work either, I had been look at a stock st's DMA signals. Switch back to the H4, made the jumper, connected the US and it just booted.... Have to say I was not expecting that.. but I'll take it. Ordered SMT glue and mmu for next board. We will have to see how that build goes. Are you going to take a look at the washed out video?
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exxos
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Re: DMA ISSUE ON H4

Post by exxos »

This is the draft of the patch board.

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1.JPG
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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.
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