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Author Topic: XMOS chips and the FPGA Arcade Replay  (Read 8951 times)

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Offline JimDrew

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Re: FPGA Replay Board
« on: July 10, 2013, 09:52:32 PM »
Quote from: skolman;740450
XMOS shows $3 quad-core 400MIPS microcontroller

Wow... that's a game changer.  4 cores that run independently would make things like emulating console machines pretty simple - one core for video, one core for audio, one core for I/O and house keeping, and one core for CPU emulation.  $3 at 100 piece means under $2.00 at 10000 pieces.  That's quite amazing.  I am going to look into these.

::edit::  These parts are OTP (one time programmable).  So, they would not be very well suited for anything that would need (or you would want to have) updates for.
« Last Edit: July 10, 2013, 09:56:27 PM by JimDrew »
 

Offline JimDrew

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Re: FPGA Replay Board
« Reply #1 on: July 11, 2013, 04:42:07 PM »
Quote from: ferrellsl;740530
@JimDrew

At such low prices why would anyone be worried about it?  Toss it out and buy a new one when you need an update.

Well, for things like the FPGA Arcade (a daughter board perhaps?), these would but useless because we need to have the ability to update firmware.   Development with these would be a nightmare when you're throwing them out every time you want to test your code as you are writing it.  They apparently have sort of simulation software to ease the development, but there is no substitute to throwing the part into a board and testing it.  Neat chip though for one-time uses - like a USB<>serial, SCSI<>IDE, etc. only interfaces, or a commercial product that will never change.
« Last Edit: July 11, 2013, 08:05:21 PM by JimDrew »
 

Offline JimDrew

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Re: FPGA Replay Board
« Reply #2 on: July 12, 2013, 07:11:08 AM »
Quote from: psxphill;740609
The 4 core version has 64k of ram and 28 i/o pins, it wouldn't even be able to emulate a c64.


That's not true.  There are already a few microcontroller based C64 emulations.  The specs for this chip with its 4 cores could easily emulate the C64 if you added some external RAM.
 

Offline JimDrew

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Re: XMOS chips and the FPGA Arcade Replay
« Reply #3 on: July 13, 2013, 06:55:18 AM »
At that point you are better off with a couple of 100MIPs ST32 micros at $5.00 each... Lots of code space, RAM, I/OS.