Description
SCPH-750XX — First PS2 Without Hardware Backwards Compatibility
The 750XX series marked the first PlayStation 2 revision to ship without hardware-based backward compatibility. It was produced from Q3 2005 (datecode 5C) through Q3 2006 (datecode 6C).
Hardware Changes
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Sony removed the PS1’s MIPS R3000A CPU, which had previously served as the I/O processor.
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In its place, Sony introduced a PowerPC CPU, tasked with emulating the PS1 CPU while also handling the network features of the SPEED chip, which was dropped from the design.
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This change allowed Sony to fully eliminate hard drive support.
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The removal of the R3000A had side effects on both PS1 and PS2 software compatibility. Sony addressed this with software-level compatibility fixes for affected games.
Optical Drive Information
The 750XX series shared the same optical drive hardware as the later SCPH-700XX units:
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Standard assembly: KHM-430AAA (Sony).
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Alternate chassis: TDP082W “K/L” (Mitsumi), functionally identical to the Sony version.
Compatible lasers include:
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KHM-430 (Sony)
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PVR-802W (Mitsumi)
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KHS-430 (aftermarket)
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TDP-182W (aftermarket, named after its chassis)
Despite the different names, all four are functionally identical.
BIOS Information
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All 750XX units shipped with BIOS ROM v2.20.
Datecode Information
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Manufactured from Q3 2005 (5C) to Q3 2006 (6C).
