E-TRACKER for ZX Spectrum ?

[VELESOFT]

DSK image for SAM COUPE (or emulator):
http://velesoft.speccy.cz/samcoupe/s...1.2.(fred).zip

MORE INFO:
http://www.worldofsam.org/node/254

http://translate.google.com/translat...saa1099-cz.htm

On SAM COUPE computer is popular E-TRACKER utility for create music based on SAA1099 soundchip. Same soundchip is used in ZXM SOUNDCARD and SAM COUPE music can be played on ZX computers. Actually is possible only one way for write new music for SAA1099 = use original E-TRACKER on SAM COUPE(or emulator) and compiled music file use on ZX computer with connect ZXM SOUNDCARD.

My idea is : port E-TRACKER from SAM COUPE to ZX Spectrum(or russian ZX clones). Actually I export E-TRACKER code from SAM COUPE emulator to BIN files. As I see then E-TRACKER code is in high 32kB of 64kB adress space and use low 32kB for DATA. Use hardware multicolor mode (similar as ZX mode with attributes in size 8x1 pixels = 6144 bytes graphic + 6144 bytes attributes). For videoram access change memory page in low 32kB, connect videoram memory and rewrite graphics. After return from graphic operations set in 32kB ram for data and continue in tracker code. Theoretically can be redirect graphic code for access to ZX page 7(second videoram). And ZX rom can be replaced with allram mode (ram page 0). Then pages 0+5 can be used for DATA and pages 2+4(or 1,3,6) can be used for E-TRACKER code. I must yet disassembly E-TRACKER code and verify if use any access to other SAM COUPE ports (programmable interrupt, etc....). Theoretically if I disable code for videoram access and import E-TRACKER code to allram mode on any russian clone, then can play SAA1099 music (this my theory only...)

SAA1099 music examples: (sorry for bad MP3 quality.. my PC is very slow)
http://velesoft.speccy.cz/saa-music1h.mp3
http://velesoft.speccy.cz/saa-music2h.mp3
http://velesoft.speccy.cz/saa-music3h.mp3
http://velesoft.speccy.cz/saa-music4h.mp3
http://velesoft.speccy.cz/saa-music5h.mp3
http://www.quazar.clara.net/media/th...ng-snippet.mp3
http://www.quazar.clara.net/media/harlequin-snippet.mp3
http://www.quazar.clara.net/media/conquest-snippet.mp3
http://www.quazar.clara.net/media/sr11one.mp3
http://velesoft.speccy.cz/saa1099-ay_emulation.mp3

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