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taobao actually does work

honestly thats a big problem with kickstarter, thereve been other projects where the dudes bailed bigtime after they got the cash and theres no real balance for kickstarter to help them

least hes coming through, midines had its time but idk what happened with wayfar

My understanding is that wayfar started selling Midines carts on the side on eBay while there were still tons of people backordered from his site, pretty shady.

really just depends how complex you want your image to be, for example this is my code for animating nyan cat (loops through sprite table and increments each sprites tile reference)

CatReset:
      LDA #$00
      STA CatCounter
CatResetLoop:
      LDA $0501, x            ; load data from address
      SEC
      SBC #$C0
      STA $0501, x
      INX
      INX
      INX
      INX
      CPX #$58
      BNE CatResetLoop
      RTS

CatMove:
      LDX #$00
      LDA CatCounter
      CMP #$04
      BEQ CatReset
CatMoveLoop:
      LDA $0501, x            ; load data from address
      ADC #$30
      STA $0501, x
      INX
      INX
      INX
      INX
      CPX #$58
      BNE CatMoveLoop
      INC CatCounter
      RTS

this doesn't handle any movement related to input, just the basic animation

as Telerophon stated, VegaPlay is sufficient for putting a Famitracker-tracked album into a cart, it uses NROM which is an easy cart to reproduce. I've built a few carts using VegaPlay as a base. My Nyan Cat NES demo actually used VegaPlay as it's code base, though i've stripped out most of the original code and placed in my own graphics routines.

I'd help you out if I had spares to part with, fwiw I see monotron's show up on craigslist for much less than retail all the time ($25 range)