A600 reboots on floppy write

psoma · 25 February 2021, 12:32

Hi all,

Looking at an A600 for a friend... very bizarre issue. Reading floppies works fine, but if I try to write to the floppy, the Amiga instantly resets.

Run CIA tests on DiagROM - all pass.
Run CIA tests on Amiga Testkit - all pass.
Run floppy write tests with both... Amiga resets.
Exhibits the same behaviour with "real" internal floppy, gotek + external floppy.
Amiga has been cleaned and recapped by me (have done many dozen - and this was a "clean" one - no repairs required)

Will trace out DKWD between the floppy port + GAYLE as well as GAYLE + PAULA but is there anything else I should be looking at given this bizarre behaviour?

Cheers,

Tom

psoma · 25 February 2021, 12:38

Well, that was an easy fix... noticed a bridge between DKWEB and KBRESET, so whenever Disk Write Enable went high (or low) it triggered a KBRESET!

Nothing to see here

musashi5150 · 25 February 2021, 15:18

This made me smile

Well done for finding it

hooverphonique · 25 February 2021, 17:12

Quote:

Originally Posted by psoma

well, that was an easy fix... Noticed a bridge between dkweb and kbreset, so whenever disk write enable went high (or low) it triggered a kbreset!

:d :d

Edit: what the - when I put in "colonD" it turns the "D" into "d"..

25 February 2021, 12:32	#1
psoma Registered User Join Date: Nov 2019 Location: Melbourne, Australia Posts: 193	A600 reboots on floppy write Hi all, Looking at an A600 for a friend... very bizarre issue. Reading floppies works fine, but if I try to write to the floppy, the Amiga instantly resets. Run CIA tests on DiagROM - all pass. Run CIA tests on Amiga Testkit - all pass. Run floppy write tests with both... Amiga resets. Exhibits the same behaviour with "real" internal floppy, gotek + external floppy. Amiga has been cleaned and recapped by me (have done many dozen - and this was a "clean" one - no repairs required) Will trace out DKWD between the floppy port + GAYLE as well as GAYLE + PAULA but is there anything else I should be looking at given this bizarre behaviour? Cheers, Tom

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25 February 2021, 12:38	#2
psoma Registered User Join Date: Nov 2019 Location: Melbourne, Australia Posts: 193	Well, that was an easy fix... noticed a bridge between DKWEB and KBRESET, so whenever Disk Write Enable went high (or low) it triggered a KBRESET! Nothing to see here

25 February 2021, 15:18	#3
musashi5150 move.w #$4489,$dff07e Join Date: Sep 2005 Location: Norfolk, UK Age: 42 Posts: 2,351	This made me smile Well done for finding it

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