Rodrigo Copetti’s practical analysis reveals the complex technology behind Sony’s PSVita. The new DRM-free eBook edition, periodically updated, dives deep into the console’s CPU architecture. As Sony shifted from MIPS to ARM technology, the PSVita’s main chip, Kermit, housed various CPUs, GPUs, and memory, thanks to Toshiba’s innovative Stacked Chip SoC fabrication. The Cortex-A9 CPU, a quad-core cluster, runs at 500 MHz, prioritizing battery life over processing speed. ARM’s ARMv7 ISA introduced significant enhancements, including multi-core support and Out-Of-Order execution. Sony’s customized PSVita package incorporated ARM’s Primelink Level 2 Cache Controller and 2 MB of L2 cache, enhancing performance.
https://www.copetti.org/writings/consoles/playstation-vita/