Question on ProDOS SYS Files

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tkh
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Joined: Jun 26 2013 - 16:12
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Question on ProDOS SYS Files

I have a simple question:
How do you read ProDOS SYS files and possibly edit it?
I know a command to run it, but not to actually view the content.

Also, how do you create a bootable disk of your own program?

My plan is to 'dissect' a program (I got AppleWriter in mind) and learn it.

speedyG's picture
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Joined: Nov 16 2011 - 07:45
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Re: Question on ProDOS SYS Files

Hello tkh,
.sys -files can originate from different kinds of sources.... in general most of them
result from a compiler
- in such cases the result is true Machine code - not comaparable
with Apllesoft or Integer files.....

sometimes it´s possible to at least disassenly that files... depending to the complexity...

in general the best way to attept access to .sys files is
first reading the ProDOS User manual:
http://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Software/Operating%20Systems/Apple%20ProDOS/Manuals/Apple%20II%20ProDOS%20User%27s%20Manual.pdf
and afterwards reading beneath Apple ProDOS:
http://mirrors.apple2.org.za/Apple%20II%20Documentation%20Project/Books/Beneath%20Apple%20ProDOS.pdf
there you will find basics about .sys-files and also advanced information in startup procaess and manipulation
of startup process ( i.e. boot stages and loading processes )
some small parts also treat manipulation of such files...
anyhow attempting such files witout that basic knowledge,
will very sure lead to severe disappointments and frustration....

sincerely speedyG

tkh
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Last seen: 4 years 6 months ago
Joined: Jun 26 2013 - 16:12
Posts: 34
Re: Question on ProDOS SYS Files

Thanks for the reply!
I had read the ProDOS user manual. However, I haven't read Beneath the ProDOS.
I am checking the book...

Once again, thank you!

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