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15 February 2013, 01:18
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#1 |
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Registered User
Join Date: Jan 2013
Location: Chicago, IL USA
Posts: 585
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High Density floppy disk in 4000T
I am setting up my 4000T.
The model of the floppy drive says its 1,4mb HD floppy drive. But in WB 3.1 when I goto format the disk it say only 880k Does that mean I cant use HD disks Thanks! |
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15 February 2013, 01:25
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#2 |
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Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
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If your Amiga recognizes the floppy drive as high density, it will offer you an option to format the disk to 1760kB. If not, then it will only offer the 880kB format option.
If you have a high density Amiga floppy drive and you have 3.1 Kickstart ROMs, then this will be automatic. Thus, it appears that, although your Amiga is equipped with a high density floppy drive unit, it has not been modified to give it the characteristics necessary to switch to 150rpm rotation speed for compatibility with high density disks in the Amiga. Last edited by prowler; 15 February 2013 at 01:33. |
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15 February 2013, 01:31
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#3 |
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Registered User
Join Date: Jan 2013
Location: Chicago, IL USA
Posts: 585
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Hi Prowler,
how do I get my miggy to recognize it as a HD floppy drive? Cheers! |
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15 February 2013, 01:48
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#4 |
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Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
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This Sony MPF920 E/131 high density floppy drive has been modified to switch to 150rpm rotation speed for compatibility with high density disks in the Amiga:
The PLCC chip which has been glued to the chassis top-down is the key to adding this compatibility. That picture, and the discussion which accompanies it, appears in this thread: http://eab.abime.net/showthread.php?t=43265 |
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15 February 2013, 11:48
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#5 | |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,864
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Quote:
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16 February 2013, 02:47
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#6 |
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Registered User
Join Date: Jan 2013
Location: Chicago, IL USA
Posts: 585
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I jope,
I have 2 different floppy drives that came with my 2 4000T's The model numbers are: Sony MPF520-1 Mitsumi D359T5 |
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16 February 2013, 22:24
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#7 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,864
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Ok, neither of those will support HD disks without extensive modifications.
Unfortunately no-one's really made a silver bullet solution for getting various "PC" drives to work as Amiga high density drives, so the easy solutions are either to find yourself a Chinon FZ-357A or stick to DD floppies and use your existing drives. |
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17 February 2013, 00:22
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#8 |
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Registered User
Join Date: Jan 2013
Location: Chicago, IL USA
Posts: 585
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Thanks Jope. I will buy a Chinon FZ-357A
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17 February 2013, 10:22
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#9 |
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Registered User
Join Date: Apr 2010
Location: Italy
Posts: 1,136
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i can modify one drive to 1,76
30$ plus p&p to usa |
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17 February 2013, 13:14
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#10 |
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Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,864
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cpiac64, which drive model would that be and are the instructions available somewhere?
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17 February 2013, 15:12
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#11 |
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Registered User
Join Date: Apr 2010
Location: Italy
Posts: 1,136
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i have buy some time ago 10 chip for modify the drive from user inside this forum but i have lost 8 of this, one have sale yesterday and one is in test and for sale soon
if found the other 8, modify and accept request |
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