Floppy write protected (when its not) fix.
Floppy write protected (when its not) fix.
This is a shortened version of this thread..https://www.exxosforum.co.uk/forum/viewt ... =23&t=1410
The issue was with a STE machine, which was continuously or intermittently reporting the floppy was write protected when it was not.
The assumptions are the drive has been tested and working fine in another machine. It is also assumed that the WP pin on the 1772 is always high (for write enabled operations).
The fix for this issue to solder a 10K bussed resistor array to the 1772 databus pins as illustrated below.
The white wire connects the common pin on the resistor array to 5V.
Video below demonstrating one error without DMA pullups.
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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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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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Re: Floppy write protected (when its not) fix.
Just made this mod to my STFM
Hasn’t helped my issue but was easy to do
Hasn’t helped my issue but was easy to do
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: Floppy write protected (when its not) fix.
Just checking, as I dont have any 10k, do you think it will work with 4.7k?
If it ain't broke, test it to Destruction.
Re: Floppy write protected (when its not) fix.
Assume would be ok..Forgottenmyname wrote: ↑Sun Jan 20, 2019 1:09 pm Just checking, as I dont have any 10k, do you think it will work with 4.7k?
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: Floppy write protected (when its not) fix.
Did this on a STfm (070789-001 RevD) since I fitted 2.2 booster on it and having problem reading disks. Works perfectly now.
EDIT: v2.3 booster
EDIT: v2.3 booster
Re: Floppy write protected (when its not) fix.
Thanks for letting us know
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: Floppy write protected (when its not) fix.
This fix solved my issue with ACSI CF adapter in 1040 STfm. Before, it was writing complete garbage on the CF card, after applying this fix - works like a charm!
Re: Floppy write protected (when its not) fix.
Thank you !
As I didn't have the right resistor network, I built my own.
Seems to do the trick.
As I didn't have the right resistor network, I built my own.
Seems to do the trick.
Re: Floppy write protected (when its not) fix.
Wow today's geek award goes to...
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: Floppy write protected (when its not) fix.
I'd remove the chip, put a precision socket in and place the resistor array on the bottom of pcb.