Floppy write protected (when its not) fix.

Various tweaks and fixes from video ghosting to audio fixes etc.
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exxos
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Floppy write protected (when its not) fix.

Post by exxos » Thu Dec 06, 2018 6:10 pm

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This is a shortened version of this thread..viewtopic.php?f=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.
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4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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terriblefire
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Re: Floppy write protected (when its not) fix.

Post by terriblefire » Mon Dec 31, 2018 5:56 pm

Just made this mod to my STFM

Hasn’t helped my issue but was easy to do




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Forgottenmyname
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Re: Floppy write protected (when its not) fix.

Post by Forgottenmyname » Sun Jan 20, 2019 1:09 pm

Just checking, as I dont have any 10k, do you think it will work with 4.7k?

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Re: Floppy write protected (when its not) fix.

Post by exxos » Sun Jan 20, 2019 1:16 pm

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?
Assume would be ok..
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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