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Psp screen recorder mac portable#
Psp screen recorder mac plus#
Psp screen recorder mac psp#

A cache write-back buffer: the CPU can write over cache believing it has updated physical memory as well.

32 KB of L1 Cache: of which 16 KB is for instructions and 16 KB for data.

A Memory Protection Unit or ‘MPU’ (not to be confused with an ‘MMU’): this is a dedicated unit that maps the physical hardware onto the CPU’s memory space with some special quirks in-between.

Here is a previous explanation of CPU pipelining if you don’t remember.

7-stage pipeline: same as the Gamecube.

32 general-purpose registers: all of them store 32-bit numbers, and two (the zero register and link register) are reserved for special uses.

A 32-bit address bus: this means that up to 4 GB of memory can be seen by this CPU.

All of this, while still retaining the ‘RISC’ badge.

These are called ‘Allegrex Extended instructions’. Furthermore, Sony added exclusive instructions for arithmetic operations (multiplication, subtraction, min/max, bit-shifts) and interrupt control. To be precise, it implements all MIPS I instructions for general purposes while adding branch instructions from MIPS II.

A custom MIPS ISA: mixes instructions from different MIPS revisions.

This new design is called Allegrex and runs at a variable speed, from 33 MHz to 333 MHz.Īllegrex is a complete 32-bit core offering :

In the official documents, they refer to it as a ‘MIPS core’ which borrows some IP from the MIPS R4000 (you may remember Nintendo doing something alike). Moving on, the main CPU is also an in-house design by Sony. The SoC is called Tachyon, a name chosen by Sony themselves (after watching some Star Trek?). This includes the main CPU in charge of executing games and other programs (unlike the other CPUs, which we’ll talk about in due time). Similarly to Nintendo, Sony built an extremely packed System-on-Chip (SoC) that houses most of the components we are going to discuss throughout this article.

Psp screen recorder mac plus#

Main one) plus the others I made for each section). If you ever feel fed up with information, don’t forget to take a look at the diagrams (the It’s not a short write-up, but I hope that at the end of the article you will be able to grasp the building blocks of this console (its design rationale, choice of CPUs, GPU pipeline, security system and so forth).

Psp screen recorder mac psp#

This article is dedicated to anyone that wants to understand, straight to the point, how the PSP operates.

Psp screen recorder mac portable#

Released just one month after the Nintendo DS, Sony’s PSP proved that ‘horizontal innovation’ is not the only way to succeed in the portable console market. Motherboard with important parts labelled Diagram Main architecture diagramĪfter the 'Slim' model, NAND and SDRAM size were doubled (to 64 MB each) This tells you how fast technology has become!Īfter the 'Slim' model, Tachyon and 'NAND + SDRAM' became one. Those zigzags you see between the CPU and memory attempt to correct the length of each bus so all of the signals arrive at the same time.

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