Not the 8051 but I am familiar with PICs, AVRs and C in general. (as well as
a small amount of intel 86 assembler)
Would it be to big a challange for a hobbyist familiar with the above to
turn around and program the required 8051 code for this mp3 decoder?
Nigel
Probably not. The data storage can be MMC, which is fairly easily implemented, there's
plenty of code on the 'net for various processors to drive this. The website
http://www.mp3projects.com has a large repository of knowledge, however
it's recently been sold and the new owner is yet to restart the website.
It's also got an ATA/ATAPI interface, so you can use compactflash cards too.
The spec for CF is on Sandisk's website. There's also an application note on
Motorola's website somewhere.
Check out this website too. He uses the AVRs in his projects though, not the '51 based controllers.
http://www.myplace.nu/mp3/
The distributors I mentioned earlier also take credit cards and will sell over the phone.