> The PPC-IOP ASIC, present in SCPH-75xxx and newer PS2 models, features a hybrid hardware and software approach to emulating the MIPS R3000A processor found in the PS1 and 70K or older PS2 models. The hardware portion of this emulation comes in the form of an Auxiliary Processing Unit or APU attached to a PPC 440 core clocked at 440MHz. The software portion comes in the form of the “DECKARD” emulation software.
The PS3 has always used pure software emulation for the PS1.
†Technically only the SCPH-7500x and later slim models feature the PPC-IOP and Deckard. The SCPH-7000x works the same as fat consoles, where the CPU side of PS1 games run natively on bare metal.
https://israpps.github.io/PPC-Monitor/docs/Architecture%20Ov...
> The PPC-IOP ASIC, present in SCPH-75xxx and newer PS2 models, features a hybrid hardware and software approach to emulating the MIPS R3000A processor found in the PS1 and 70K or older PS2 models. The hardware portion of this emulation comes in the form of an Auxiliary Processing Unit or APU attached to a PPC 440 core clocked at 440MHz. The software portion comes in the form of the “DECKARD” emulation software.
The PS3 has always used pure software emulation for the PS1.
†Technically only the SCPH-7500x and later slim models feature the PPC-IOP and Deckard. The SCPH-7000x works the same as fat consoles, where the CPU side of PS1 games run natively on bare metal.