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:
Motherboard recapping:
Motherboard recapping:
Time to socket the 7406:
Lets try a new 7406 chip:
OH joy:
Not all is lost... we have the floppy header to fit next. Fingers crossed.
AtariFox STFM service blog
- Cosmic Puppet
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Re: AtariFox STFM service blog
Nice one!
US Atari 520 STFM (C070523-001 REV.D1) , Exxos PSU, 4MB Marpet Upgrade, Exxos 6 Chip TOS 1.04 USA, EmuTOS 20211020, Ultrasatan, PP Driver, Original Floppy Disk Drive, NEC Multisync EA193Mi Monitor, Star LC-10c Printer, iMP C100110-001 DMA.
Re: AtariFox STFM service blog
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.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: AtariFox STFM service blog
Watching with interest as I got this far with one of my Megas
If it ain't broke, test it to Destruction.
Re: AtariFox STFM service blog
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:
Re: AtariFox STFM service blog
Pins 4 isn't used so hack it off
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: AtariFox STFM service blog
I chose to buy floppy cables without blocked pin holes, instead.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.
Re: AtariFox STFM service blog
New floppy header and cable installed. Still no dice
Time to try Exxos other suggestions.
Time to try Exxos other suggestions.