Modifying PC floppy drives for Amiga use - Page 24

jasonsbeer · 26 January 2023, 04:03

Quote:

Originally Posted by kinmami

Do JP03 or 04, 05 switch (using the 0ohm resistor) between pin 2 and pin 34?

They switch the signal for pin 2, but none of the jumpers connects directly to pin 34. Pin 34 goes straight to the IC. Just after posting, I found this page, which is the same layout as mine. It's a bit confusing, but I gather JP10 signals the controller IC to declare what signal goes to pin 34.

All for not, though. After making the revisions, I damaged the mechanism reassembling.

freesofia · 14 February 2023, 09:32

Something very interesting happened while modding a Sony MPF920 E131 Floppy Drive last night!
Perhaps, it will be of interest to people who love the classic Amiga floppy, but are annoyed by its constant "heartbeat"!

According to the classic scheme, I changed what was necessary, only the 0-ohm element from JC30 I did not remove it, but moved it to JC31 (instead of making a bridge there)!
The effect is, the floppy works flawlessly on the Amiga 1200, X-copy and its derivative applications work wonderfully with it, but it stops after 2 cycles per check with a fully loaded Workbench 3.2.1 - stops "thumping", but is waiting for the floppy always!
The Amiga boots floppies through it perfectly...

Jope · 14 February 2023, 09:37

You're sure you don't have a no-click tool installed?

keithamiga1200 · 22 April 2023, 15:28

Both look identical, apart for a passives (D359M3 does not have any passives/resistors on DEN1 & DEN3, unlike D353M3). Any suggestions about disabling the HD?

Mitsumi D353M3

Mitsumi D359M3

22 April 2023, 15:28	#464
keithamiga1200 Registered User Join Date: Oct 2019 Location: UK Posts: 29	Mitsumi D353MS & D359M3 Mods Both look identical, apart for a passives (D359M3 does not have any passives/resistors on DEN1 & DEN3, unlike D353M3). Any suggestions about disabling the HD? Mitsumi D353M3 Mitsumi D359M3 Last edited by keithamiga1200; 22 April 2023 at 16:39. Reason: Small error

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14 February 2023, 09:32	#462
freesofia Registered User Join Date: Oct 2022 Location: Sofia Posts: 23	Something very interesting happened while modding a Sony MPF920 E131 Floppy Drive last night! Perhaps, it will be of interest to people who love the classic Amiga floppy, but are annoyed by its constant "heartbeat"! According to the classic scheme, I changed what was necessary, only the 0-ohm element from JC30 I did not remove it, but moved it to JC31 (instead of making a bridge there)! The effect is, the floppy works flawlessly on the Amiga 1200, X-copy and its derivative applications work wonderfully with it, but it stops after 2 cycles per check with a fully loaded Workbench 3.2.1 - stops "thumping", but is waiting for the floppy always! The Amiga boots floppies through it perfectly...

14 February 2023, 09:37	#463
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	You're sure you don't have a no-click tool installed?

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