Difference between revisions of "PSP"

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* two MIPS32R2 cores with no [[TLB]]
 
* two MIPS32R2 cores with no [[TLB]]
 
* 128bit Bus
 
* 128bit Bus
* 1 - 333MHz @ 1.2V (currently capped at 222MHz (The 222MHZ cap is software based and lies in the executed files, it is not firmware based so is easily bypassed))
+
* 1 - 333MHz @ 1.2V
 
* Main Memory: 32MB, 4MB eDRAM
 
* Main Memory: 32MB, 4MB eDRAM
 
* Bus Bandwidth: 2.6GB/sec
 
* Bus Bandwidth: 2.6GB/sec
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== Linux support ==
 
== Linux support ==
Since the PSP's Allegrex CPU has no mmu, only uClinux variety kernels can be run on it.  A mipsnommu branch of uClinux 2.4.19 has been ported to the PSP and is available at http://df38.dot5hosting.com/~remember/chris/
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Since the PSP's Allegrex CPU has no mmu, only uClinux variety kernels can be run on it.  A mipsnommu branch of uClinux 2.4.19 has been ported to the PSP and is available at http://sites.google.com/site/linuxonpspproject/
 +
 
 
uClinux 2.6.22 has recently been ported too and is available at http://jacksonm88.googlepages.com/linuxonpsp.htm
 
uClinux 2.6.22 has recently been ported too and is available at http://jacksonm88.googlepages.com/linuxonpsp.htm
  
 
== External Links ==
 
== External Links ==
 +
* [http://psplinux.info  Official PSPlinux Site]
 
* [http://df38.dot5hosting.com/~remember/chris/  PSP port of uClinux]
 
* [http://df38.dot5hosting.com/~remember/chris/  PSP port of uClinux]
 
* [http://www.extremetech.com/article2/0,,1639233,00.asp Sony Details PSP Chip Specs]
 
* [http://www.extremetech.com/article2/0,,1639233,00.asp Sony Details PSP Chip Specs]
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* [http://psp.ign.com/articles/513/513175p1.html The PSP FAQ]
 
* [http://psp.ign.com/articles/513/513175p1.html The PSP FAQ]
 
* [http://psp.ign.com/articles/542/542182p1.html PSP: A New Taste of the PSP Chips]
 
* [http://psp.ign.com/articles/542/542182p1.html PSP: A New Taste of the PSP Chips]
* [http://www.lik-sang.com/psp.html Taking Apart the PSP]
 
 
* [http://www.engadget.com/entry/1234000510024287/ A detailed review of the PSP]
 
* [http://www.engadget.com/entry/1234000510024287/ A detailed review of the PSP]

Latest revision as of 05:52, 19 August 2011

Some basic specs of the PSP:

  • two MIPS32R2 cores with no TLB
  • 128bit Bus
  • 1 - 333MHz @ 1.2V
  • Main Memory: 32MB, 4MB eDRAM
  • Bus Bandwidth: 2.6GB/sec
  • I-Cache, D-Cache
  • FPU, VFPU (Vector Unit) @ 2.6GFlops
  • 3D-CG Extended Instructions

The description should be taken with a grain of salt. For instance, even the CPU core is not clear - maybe it is MIPS 4KE, but maybe 24K... The Coprocessor seems to be totally custom.

Lack of MMU makes this machine pretty much worthless except as a toy - which is what it was devised for, after all.

Linux support

Since the PSP's Allegrex CPU has no mmu, only uClinux variety kernels can be run on it. A mipsnommu branch of uClinux 2.4.19 has been ported to the PSP and is available at http://sites.google.com/site/linuxonpspproject/

uClinux 2.6.22 has recently been ported too and is available at http://jacksonm88.googlepages.com/linuxonpsp.htm

External Links