Floppy write protected (when its not) fix.

Various tweaks and fixes from video ghosting to audio fixes etc.
Post Reply
User avatar
exxos
Site Admin
Site Admin
Posts: 5109
Joined: Wed Aug 16, 2017 11:19 pm
Location: UK
Contact:

Floppy write protected (when its not) fix.

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

IMG_3667.JPG
IMG_3667.JPG (104.51 KiB) Viewed 78 times

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.

ste_fix.jpg
ste_fix.jpg (188.8 KiB) Viewed 78 times
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.

Post Reply