16GB MP5 PMP -4.3" LCD + SD CARD SLOT <OZ SELLER - OZtion Auction Item 6936472
look at this player, it's RK2706 based and has RKP platform. The auction is ended but it proves that it is possible, maybe ZSP500 also has no problems with ZSP400 instructions? If this player runs RKP natively it is as I said, and we have already got the compiler. It has up to 32bit data types so no huge limitations will arise. Other possibility is that RKP files are emulated, and it would also be useful if we got the FW of such a player.