MODIFY ALPS DF354H DRIVE FOR ATARI USE

Update your old 720k to a 1.44 drive etc.
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exxos
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MODIFY ALPS DF354H DRIVE FOR ATARI USE

Post by exxos » Thu Dec 14, 2017 3:23 pm

I tested one of these drives today. It supports 11S/83T & 22S/83T (Tested in FCOPY PRO)

DEFAULT IS DS1.
ds1.jpg
ds1.jpg (396.45 KiB) Viewed 363 times

CHANGE TO DS0 FOR ATARI USE.
ds0.jpg
ds0.jpg (380.73 KiB) Viewed 363 times

I ALSO SOLDER A 0805 10uF CAP ACROSS THE 5V RAIL ON ALL MY DRIVES>
0805cap.jpg
0805cap.jpg (54.22 KiB) Viewed 363 times

LOCATION FOR HD WIRE SELECT
hdwire.jpg
hdwire.jpg (358.68 KiB) Viewed 363 times

WARNING! DO NOT UNDO THESE SCREWS! I PUT SOME THREAD LOCK ON THEM JUST TO BE SAFE!

If you do, it will upset the head alignment and you will spend the next 2 hours trying to get to all aligned again ;)

plate.jpg
plate.jpg (269.26 KiB) Viewed 363 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.

Zarchos
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Re: MODIFY ALPS DF354H DRIVE FOR ATARI USE

Post by Zarchos » Thu Dec 14, 2017 4:20 pm

Interesting.
What is the cap for exactly ?

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exxos
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Re: MODIFY ALPS DF354H DRIVE FOR ATARI USE

Post by exxos » Thu Dec 14, 2017 4:26 pm

Zarchos wrote:
Thu Dec 14, 2017 4:20 pm
Interesting.
What is the cap for exactly ?
Smoothing on 5V rail. A lot of drives have electrolytics which dry up. So I just put a 10uF across the power and have done with it all.
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.

Zarchos
Posts: 25
Joined: Mon Dec 11, 2017 4:01 pm

Re: MODIFY ALPS DF354H DRIVE FOR ATARI USE

Post by Zarchos » Thu Dec 14, 2017 4:30 pm

exxos wrote:
Thu Dec 14, 2017 4:26 pm
Zarchos wrote:
Thu Dec 14, 2017 4:20 pm
Interesting.
What is the cap for exactly ?
Smoothing on 5V rail. A lot of drives have electrolytics which dry up. So I just put a 10uF across the power and have done with it all.
Ok thanks for the info.

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