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milry62

"Unable to load prodos" issue

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I am new to the vintage computing world, and I have finally gotten my IIc's disc drive to work. I often get the message "unable to load prodos." Is there a remedy to this situation?

 

 

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It sounds like the Disk is Damaged, or the ProDOS has been deleted....

 

 

Or the Drive can be Dirty..

 

 

Try a different disk..

 

 

 

MarkO

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If this is what you're getting then you have a disk that simply does not have ProDOS on it.

post-4806-0-65736000-1481232905_thumb.png

 

It was likely made that way so as to have more room.

post-4806-0-98364200-1481233222_thumb.pngpost-4806-0-32936400-1481234102_thumb.png

 

Because ProDOS takes up a fair amount of space as seen here.

post-4806-0-64041900-1481233994_thumb.pngpost-4806-0-52491800-1481233810_thumb.png

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If this is what you're getting then you have a disk that simply does not have ProDOS on it.

 

Exactly. Not all disk images are bootable. Sometimes you need to load ProDos from a separate disk and then run the program.

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Reminds me of all the tricks we used to do back in the day, eliminating dos and recovering space from track 0,1,2, deleting prodos, shortening the number of VTOC entries to the exact number of files on the disk, modding DOS with a 2-byte patch to add a 35th track conducting realtime decompression with a simple RLE routine to pack even more data in there, removing sector markings.. Great times!

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With the IIgs many games/programs need to actually be run from within GS/OS (the GUI the IIgs uses), they can't be booted.

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I have had an Apple IIGS for many years. Today, I put in the startup disk  (5-1/2 in floppy) and got the message "unable to load prodos".

I proceeded to put in another startup disk and it loaded and asked for the program disk. When I put that in and hit enter it said "the date must be 1983 or later, and in this format 3/20/83. At the bottom it said type today's date or press return: 3/20/84 - I pressed enter and at the top of the next screen was a bunch of number and letters that make no sence at all.  ANY SUGGESTIONS?  Really appreciate any help I can get. Vivian 

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On 7/30/2020 at 10:49 AM, Vivian Balam said:

I have had an Apple IIGS for many years. Today, I put in the startup disk  (5-1/2 in floppy) and got the message "unable to load prodos".

I proceeded to put in another startup disk and it loaded and asked for the program disk. When I put that in and hit enter it said "the date must be 1983 or later, and in this format 3/20/83. At the bottom it said type today's date or press return: 3/20/84 - I pressed enter and at the top of the next screen was a bunch of number and letters that make no sence at all.  ANY SUGGESTIONS?  Really appreciate any help I can get. Vivian 

Could be looking at Bad RAM..  Can you run the Self Test??

 

MarkO

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