Re: Moving binary files to /RAM

[email@DELETE_THIS.luddite.no-ip.com (Simon Williams)]

Ed Eastman <noone@nowhere.net> wrote:

> Simon Williams wrote:
> > I have 16 samples named "A"..."P", each 3072 bytes copied to
> > /RAM/SAMPLES/ I'm using this code to play them in order: 160 FOR F = 65
> > TO 80 170 PRINT CHR$(4)"BLOAD /RAM/SAMPLES/" CHR$(F) ",A$2000" 180 CALL
> > 35840 : REM DAC522 190 NEXT F What happens, oddly enough, is that the
> > first 12 samples play back-to-back as one would hope, but then there is
> > a noticeable delay between the last four. I've tried this on a IIe, IIgs
> > and IIc+ with the same result...  Any ideas...?
> 
> Insert a FRE(0) at line 185... Oh wait, that is a Dos 3.3 only command. I
> still wonder about variable garbage collection in ProDOS.  Nevermind. :)
> 
> What if you change the loop to if a if goto instead of for/next?

Same problem... possibly a little less delay, but still very noticeable.

> Do you last 4 samples have a silent leader?  Try playing the first sound
> 16 time instead and see if you still get the delay on the last 4 iterations.

The samples are all identical in length and have audio starting at byte
0... I tried reversing the loop so that they play in reverse order, in
which case the _first_ 4 samples had the delay...

<some time later...>

Well, I've tried every combination that I can think of and the result
seem to be that the delay is related to the order in which the BIN files
are copied to /RAM. No matter what order I BLAOD them it always takes a
lot longer for the last four in the directory. Is it that ProDOS has a
hard time seeing anything past 12 files??? I'm annoyed and perplexed...

-s
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