kind of. The emu ROM is not really a file system but just a structure. You would need an application to create the structure from (for example) .wav or .aif files or other samples. Most ROMs are considerably less than 32MB in size (when you have the 'image' transferred to a file in an Ultra). But you also have an additional FLASH/ROM to hold the preset information (typically a 4MB ROM) This extra ROM holds the presets and all the ROM dependant information including demo songs, arpeggios etc. It seems that the content of preset ROM is copied into DRAM during start up and the preset memory is not accessed again thereafter. Because of this the P1K series modules are not able to accomodate some ROM SIMM combinations because the total load combination is greater than the 4MB (minus space used for other concerns) DRAM installed. I don't know if there are any other limitations on how big the contents of the preset ROM is, but the largest DRAM that the proteus modules support is 16MB [needs to be 4, 8, or 16, but some 32MB SIMMs are useable as 16MB DRAMs]. SO I'm not sure whether its worthwhile but more information [as much as 32MB] is addressable in that memory space so theoretically the four SIMM slots can address 256MB of information, although only 128MB of that can be used for waveforms. I believe that bandwidth limitations prevents the preset memory being accessed (and causing sound playback problems) after boot, but I'm not sure of any other reason. The bottom line is that you would need to have an SD card bigger than 128MB to make use of the entire SIMM memory space, and also there's the losses in the file system. ________________________________ From: Atom Smasher <atom@...> To: xl7@yahoogroups.com Sent: Tue, January 5, 2010 11:40:27 AM Subject: Re: [xl7] Re: Still a call for blank ROMs? On Mon, 4 Jan 2010, Jack Pratt wrote: > The SD card would have a FAT (cifs) file system (so you can program it > on almost any computer). ============ === so the FPGA would "translate" from fat32 to emu-fs? then it wouldn't even take a special application to create cards... just some type of structure for naming and numbering... no matter how you make it happen, i'm in! even if i have to open it up to swap out 128M cards! -- ...atom ____________ _________ ___ http://atom. smasher.org/ 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808 ------------ --------- --------- --------- --------- - "The Army is the Indian's best friend." -- General George Armstron Custer, 1870
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Re: [xl7] Re: Still a call for blank ROMs?
2010-01-05 by Jack Pratt