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Micronas MAS3507D MP3 decoder IC on ISA?

K

Kris Jones

Jan 1, 1970
0
I was looking at the spec sheet for the Micronas MAS3507D MP3 decoder,
http://www.micronas.com/products/documentation/consumer/mas3507d/index.php
and I noticed that you can also use 8-bit parallel input.

I was thinking about making a hardware MP3 player for PC/104
interface, which is actually ISA.

Could you just attach the MP3 decoder to an ISA bus and stream MPEG
data to it in parallel?

Am I crazy or would that work?

It seems to me the biggest problem would be getting the timing to
match up.
 
C

Costas Vlachos

Jan 1, 1970
0
Kris Jones said:
I was looking at the spec sheet for the Micronas MAS3507D MP3 decoder,
http://www.micronas.com/products/documentation/consumer/mas3507d/index.php
and I noticed that you can also use 8-bit parallel input.

I was thinking about making a hardware MP3 player for PC/104
interface, which is actually ISA.

Could you just attach the MP3 decoder to an ISA bus and stream MPEG
data to it in parallel?

Am I crazy or would that work?

It seems to me the biggest problem would be getting the timing to
match up.



I don't know anything about this IC, but based on what you've said above I
think it should work. You'll need to address-decode the ISA bus (i.e.,
allocate an ISA address to the MP3 IC) and just stream the music data to
that address one byte at a time. You could also use a buffer RAM to ensure a
stable timing.

rgds,
Costas
 
D

Daniel Simon

Jan 1, 1970
0
I was looking at the spec sheet for the Micronas MAS3507D MP3 decoder,
http://www.micronas.com/products/documentation/consumer/mas3507d/index.php
and I noticed that you can also use 8-bit parallel input.

I was thinking about making a hardware MP3 player for PC/104
interface, which is actually ISA.

Could you just attach the MP3 decoder to an ISA bus and stream MPEG
data to it in parallel?

Am I crazy or would that work?

It seems to me the biggest problem would be getting the timing to
match up.

Why not just use the printer port that your PC/104 computer is almost
certainly already equipped with?
 
K

Kris Jones

Jan 1, 1970
0
Daniel Simon said:
Why not just use the printer port that your PC/104 computer is almost
certainly already equipped with?

I thought about that kind of solution, and I just think it would be
messier. First off it would make it a dongle, which I am not too fond
of. Then there is the difference in speed. Then it would need an
external power supply.

I am also very fond of the PC/104 form factor. I have many
single-board computers that have these slots. Sound cards in PC/104
are hard to come by, and all I would want them to do is play MP3, so
why not throw in a hardware decoder? Then you could play them on
anything, even a 386! (And no, slow cpus aren't rare in embedded
form-factors, Advantech still sells 386SX PC/104 cpu boards.)

Also, if I were to start with an LPT solution first, the design would
be very different. If I ever decided to move to ISA I would have to
just scrap all the designs for LPT anyway.
 
K

Kris Jones

Jan 1, 1970
0
Anybody know anything about developing for ISA and want to give me a
hand?

I'll probably need someone to write drivers for it also.

If it turns out to be do-able, maybe it could become a commercial
product... and of course you would get a percentage!
 
E

Edward Lee epl

Jan 1, 1970
0
Anybody know anything about developing for ISA and want to give me a
hand?

I'll probably need someone to write drivers for it also.

If it turns out to be do-able, maybe it could become a commercial
product... and of course you would get a percentage!

If you provide the chip (PLC44), we can make the board for you.
The board will probably be less than $5 (qty 100) without the chip.
I emailed you with my real email ID.
 
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