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Re: [xl7] Re: Still a call for blank ROMs?

2010-01-04 by Jack Pratt

The SD card would have a FAT (cifs) file system (so you can program it on almost any computer). The most annoying thing is changing the file to load. If you've got a module in a rack (and even if you don't) opening it up to swap SIMMs (or in this case SD cards) is really tedious. I'd prefer to hack the OS to allow selecting the load file from the UI rather than change anything else. A P1K series module has a removable cover where the second MIDI port would be in a P2K module but the P2K has no easy way to provide access to a cable or selector switch of some sort without some sort of surgery (and a command station is equally recalcitrant). 

When you program a FLASH SIMM with an Ultra sampler you are only programming the wave memory - no presets. You can program the presets with the proteus module (singly or as a bank) but it is rather tedious. Definitely not recommended for pleasure.

I'm pretty sure that the structure of the SIMM wave and preset memory can be determined by inspection and/or disassembly of the P2K module ROM (which use them). Once that information is known I can write an application to pack waves into an image for loading into a card. Once you have the image sharing it is trivial...




________________________________
From: Atom Smasher <atom@...>
To: xl7@yahoogroups..com
Sent: Tue, January 5, 2010 8:56:03 AM
Subject: Re: [xl7] Re: Still a call for blank ROMs?

  
On Mon, 4 Jan 2010, Jack Pratt wrote:

> I have plans to make some SIMMs but I was thinking that they would be 
> DRAM based so that the contents were loaded at power on. The general 
> idea was that you have a micro SD card slot, an FPGA and some DRAM and 
> while the proteus module (or audity - the FPGA could provide signals for 
> either) is booting the contents of the SD card are copied into DRAM.
============ =======

this is sounding awesome...

how do the samples get onto the SD card? if that can be done without an 
ultra, count me in!!! even if it does require an ultra, i may still be 
interested.

i've never programmed a flash ROM for these things, so i'm not sure what 
data they hold in addition to "just" the sample. i'd be happy enough with 
"just" 128M of samples in a command station or proteus (type) box.

if you can work out a platform neutral (java?) application for making SD 
images, i'd drop some $$$ on the cards!

-- 
...atom

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