Conference hydra::amiga_v1

4805.0. "Contiguous Fast Ram Memory" by RIPPLE::LUKE_TE () Mon Jun 10 1991 16:31

    In another note it seemed pretty clear that I can't convert some of my
    IFF files to postscript with ADpro because I don't have enough
    contiguous memory.  It was calculated that I needed almost 2MB of
    contigous and since my machine only has a total of 2MB of fast and 2MB
    of chip, finding 2MB of contiguous anything seemed doubtful.
    
    I have the Micron 2MB board (old) which maxes out at 2MB.  Now I would
    like to add an 8up or similar type board with 2 more megs.  My question
    is, will I now have 4MB of contiguous fast ram or will the fact that
    the memory is spread across two boards introduce the possibility that
    all the fast ram may no be contiguous?  If the boards are physically
    located next to each other, will they be contiguous, and which one
    should go in first? Or am I just naive and worrying about nothing?
    
    Terry
    

    
    Re -1
    
    Terry,
     
    I think contiguous memory will be no problem.  I have one of those 2meg
    micron memory boards and an old C= 2meg memory board and a MERGMEM
    in the startup-sequence makes them appear as a 4meg contiguous chunk.
    
    Frank

Re: .0

.1 is right on the money.  Normally, memory from different autoconfig
boards does not show up as contiguous memory even though the two
memory regions have contiguous addresses.  The problem is that
the Exec's code to merge memory deallocations into contiguous chunks
doesn't work during autoconfig.

However, the MERGMEM program that is part of the Workbench distribution,
will fix this problem by merging the memory in the Exec memory list.