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Re: [emax] Re: RS422 fun

2008-11-01 by Michael Wisbech

Hi
I only have programming knowledge from flash so i may just be rambling around.
and dont know if the script language you are using can do 'for' loops
but in flash I made a solution to a problem like yours
by making  'for loop' which was executed at some intervals, each time 
'sending'/ calculating some datas,
and having a counter addding up everytime, to use only inside the 'for loop'.

2000 commands? but each one would be the same commands-  in the script, right?
so write one command,  put it in a for loop, and make it execute 2000 times 
with a interval of 'x' millisecons or what ever.


But if you are trying to make  a rs422 interphase to dump banks, i would 
think that SCSI is faster,
I belive that rs422 was made for editing. but don't know.


At 01-11-2008 12:50, you wrote:

>I thought about using small packages of bytes. This is indeed more
>reliable but... for loading/unloading about 486000 bytes to/from the
>EII, the EII would require more than 90000 commands. The Max is
>sending only 2000 commands... Just initiating these 90000 commands
>takes an awful lot of time (request/reply with ack/nack). I tried it
>once and the result of this experiment is that the whole process
>takes between 10 and 20 minutes :-)
>I ordered a PCMCIA RS422 port now, which bypasses the USB port. Let's
>see if this device will give better results...
>
>Right now I'm checking out the Emax communication.
>The first thing I'll do is monitor the communication between Alchemy
>3 and Emax, just to be sure I understand the RS422 sysex/mma specs
>provided by Emu correctly. But I'm already fearing for the end-to-end
>response time when loading/unloading full banks with these commands.
>Because when I select "Get All" in Alchemy, it takes minutes before
>Alchemy has received all voices from the Emax via RS422; Alchemy is
>probably doing the exact same thing as I was planning to do, i.e.
>using this heap of sysex commands. So to be honest, that wouldn't be
>an alternative for SCSI access, would it ?
>


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