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Red Baron/SPAD XIII docs


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#1 Opry99er OFFLINE  

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Posted Sun Dec 9, 2018 9:48 AM

As seen in the demonstration yesterday at the meting, here is the complete binder of documents Vic Steerup has graciously scanned in for everyone.  It's a bunch.  Almost 100MB of scans.

 

 

Enjoy!

 

 

 

https://www.dropbox....N docs.zip?dl=0



#2 BuckoBrand OFFLINE  

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Posted Sun Dec 9, 2018 2:50 PM

Cool! :)

 

 

Ps. It's MEETING not METING. ;)


Edited by BuckoBrand, Sun Dec 9, 2018 2:52 PM.


#3 Opry99er OFFLINE  

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Posted Sun Dec 9, 2018 3:14 PM

Thanks for the typo fix, son.

Calling out his dad in a public forum... wow.

#4 Ksarul OFFLINE  

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Posted Sun Dec 9, 2018 3:22 PM

Turtles would do the same, and I'd be glad of it. Sometimes he knows more about things than I do!



#5 BuckoBrand OFFLINE  

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Posted Thu Jan 24, 2019 10:42 PM

Happens a lot, Ksarul. I am sometimes the same way with Dad! :)



#6 acadiel OFFLINE  

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Posted Wed May 1, 2019 9:47 AM

So, were Spad XIII and Red Baron the same program?



#7 iliketurtles OFFLINE  

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Posted Wed May 1, 2019 11:12 AM

Yes they were. DataBioTics renamed the program when they put it into a cartridge.



#8 acadiel OFFLINE  

acadiel

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Posted Fri May 3, 2019 5:56 PM

Here's what the copy protection looked like on Red Baron back before it was put on cart... :)

 

Anders actually figured out some of this protection that Larry Hughes with Quality 99 Software did another variant of before.  It was actually pretty ingenious... and he changed/improved it with Red Baron Flight Simulator on disk.  Copy-C, if it was available back then, could have easily just copied the whole disk.

 

Attached Files



#9 senior_falcon OFFLINE  

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Posted Fri May 3, 2019 7:02 PM

I remember breaking the protection on SPAD13 mk2 by a much simpler method. The program is in 2 Xb programs: the first segment loads 8K into low memory and then runs the next program, which loads 24K into high memory.  All I had to do was to first run the XB program that loads the low memory segment. (This is  very slow because of the sluggish XB assembly loader.) Once the 8K is loaded the protection scheme cannot interfere - the code is already there! With the assembly code in low memory, it was easy to write a systex like loader that embeds the entire contents of low memory into an XB program. When that program runs it loads the 8K segment into low memory, then runs the high memory XB program which is all embeded code. It may be that the second program was protected by hiding the line numbers, but that is easy to defeat.That's all there is to it! 

This is the version of the program that is posted on GameShelf.

 

(Edit) - I just dug out SPAD13 mk2 and tried it out. My memory was pretty close. It does not use the XB assembly loader after all, so the 8K segment loads faster than I remembered. It takes a while to load the second segment and during that time you just have to press and hold Fctn 4. The program will break before it starts up. You can list it and see one line of code. (the rest is embedded) You can save this program as PART2. Then type NEW - the code that was loaded into low memory is still there. Then OLD DSK1.PART2 and the high memory part of the program is loaded. Type RUN and it starts right up, using the already loaded code in low memory. So that shows that you just have to find a way to save the low memory as PART1 and the protection is defeated.


Edited by senior_falcon, Fri May 3, 2019 8:01 PM.





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