AtariFox STFM service blog

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Steve
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Re: AtariFox STFM service blog

Post by Steve » Sun Sep 13, 2020 8:52 pm

BLOG UPDATE:
Never say never!

I really dislike giving up and so does AtariFox so we're persevering. The board will be recapped and a floppy header will be installed so we can test a new cable.
Motherboard recapping:
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Motherboard recapping:
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Motherboard recapping:
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Time to socket the 7406:
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Lets try a new 7406 chip:
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OH joy:
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Not all is lost... we have the floppy header to fit next. Fingers crossed.
Repairs & Servicing for Atari & Amiga machines (and any other retro computers) Located in the West Midlands UK. PM me if you require assistance.
www.solidstatesociety.co.uk

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Cosmic Puppet
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Re: AtariFox STFM service blog

Post by Cosmic Puppet » Sun Sep 13, 2020 8:54 pm

Nice one!
Atari 520 STFM (C070523-001 REV.D1) 4MB Marpet Upgrade, TOS 1.04, EmuTOS 1.0, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor.

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exxos
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Re: AtariFox STFM service blog

Post by exxos » Sun Sep 13, 2020 9:36 pm

I would also check BGACK,BG,BR on the CPU make sure they have pullups and (maybe 10K I forget) and make sure the switching is good... Also check A1 on the DMA.. I have had that cause no end of DMA issues...
https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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Steve
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Re: AtariFox STFM service blog

Post by Steve » Sun Sep 13, 2020 9:45 pm

exxos wrote:
Sun Sep 13, 2020 9:36 pm
I would also check BGACK,BG,BR on the CPU make sure they have pullups and (maybe 10K I forget) and make sure the switching is good... Also check A1 on the DMA.. I have had that cause no end of DMA issues...
Alrighty cheers, I'll test everything.
Repairs & Servicing for Atari & Amiga machines (and any other retro computers) Located in the West Midlands UK. PM me if you require assistance.
www.solidstatesociety.co.uk

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PhilC
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Re: AtariFox STFM service blog

Post by PhilC » Sun Sep 13, 2020 10:09 pm

Watching with interest as I got this far with one of my Megas
If it ain't broke, test it to Destruction.

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Steve
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Re: AtariFox STFM service blog

Post by Steve » Mon Sep 14, 2020 2:53 pm

Can anyone give me advice on this, I can't seem to find anything when searching forums. I've soldered in the header, but then noticed all PC floppy cables have a blocked hole. So it won't plug in to the header unless I remove a pin, also the same with the Atari disk drive as all of its pins are populated:
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Repairs & Servicing for Atari & Amiga machines (and any other retro computers) Located in the West Midlands UK. PM me if you require assistance.
www.solidstatesociety.co.uk

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Re: AtariFox STFM service blog

Post by exxos » Mon Sep 14, 2020 2:59 pm

Pins 4 isn't used so hack it off :lol:

Capture.JPG
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https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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czietz
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Re: AtariFox STFM service blog

Post by czietz » Mon Sep 14, 2020 3:03 pm

https://old.pinouts.ru/HD/InternalDisk_pinout.shtml wrote: On some mainboards pin 3 is used as the key (missing pin) and on some pin 5 is used as the key pin, while a lot of mainboards dont have the key pin removed at all. This can all cause problems when using cables which have the key pin hole closed. As all odd pins are ground there are no technical implications in modifying such cables by removing the key pin closure by force.
I chose to buy floppy cables without blocked pin holes, instead.

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Steve
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Re: AtariFox STFM service blog

Post by Steve » Mon Sep 14, 2020 3:20 pm

Cheers guys!
Repairs & Servicing for Atari & Amiga machines (and any other retro computers) Located in the West Midlands UK. PM me if you require assistance.
www.solidstatesociety.co.uk

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Steve
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Re: AtariFox STFM service blog

Post by Steve » Mon Sep 14, 2020 4:28 pm

New floppy header and cable installed. Still no dice 😞
Time to try Exxos other suggestions.

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Repairs & Servicing for Atari & Amiga machines (and any other retro computers) Located in the West Midlands UK. PM me if you require assistance.
www.solidstatesociety.co.uk

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