Floppy write protected (when its not) fix.

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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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