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Conference hydra::amiga_v1

Title:AMIGA NOTES
Notice:Join us in the *NEW* conference - HYDRA::AMIGA_V2
Moderator:HYDRA::MOORE
Created:Sat Apr 26 1986
Last Modified:Wed Feb 05 1992
Last Successful Update:Fri Jun 06 1997
Number of topics:5378
Total number of notes:38326

2594.0. "A501" by UTRUST::VANELSWIJK () Thu May 25 1989 13:01

    Help !  Help !
    
    Does anybody know if it's possible to have a memory-switch for the
    A501-memory expansion, so we can switch between 512K and 1MEG ???
    
    
    To our Dutch friends:
       "Een walvis is een lekker dier: veel gekut en weinig spier."
     						[ME&PP]
    
    Damage Ltd, Holland
T.RTitleUserPersonal
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2594.1YES YESVIVIAN::S_GOLDSTEINSteve G.. Tel 01-234-5935Thu May 25 1989 14:269
    	The answer is YES.
    
    		I'll lookup what pin needs to be disconnected and post
    a note tomorrow.
    
    		Steve G...
    
    Only us when off. BUT why not us a software Boot program that can
    do the same thing ??!!
2594.2This may work!!!GLDOA::STOUGHTONThu May 25 1989 17:574
    I may be out of my league here but doesn't nofastmem on the workbench
    cut the upper 512k off???
                              
                 Gregg
2594.3I used it once.DNEAST::SEELEY_BOBThu May 25 1989 18:595
    Yes, Nofastmem will eliminate the linkages to fast ram.  I think
    that it hides in the system directory.  It's a very small piece of
    code and will execute from CLI or your startup-sequence.  I used it 
    once to finally play Gravity Wars and it seemed pretty effective.
    
2594.4BAGELS::BRANNONDave BrannonFri May 26 1989 04:469
    nofastmem and it's cousins assume you can run a program before the
    brain dead software starts.  This is not possible to do for games
    with custom boot sectors that boot directly into running the game.
    
    Can I assume a similar type switch could be added to connector on
    an external memory board?  What is needed to make the system not
    believe the memory is there?
    
    -Dave