PSP

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

• Official PSPlinux Site
• PSP port of uClinux
• Sony Details PSP Chip Specs
• PSP Specs
• The PSP FAQ
• PSP: A New Taste of the PSP Chips
• A detailed review of the PSP