The filename suffix 200.bin is non-standard for retail consoles. Official Sony dumps are usually .rom or .bin without a number.
The SCPH-70004 is not merely a smaller PS2; it is an entirely different beast internally. The BIOS file v12 eur 200.bin is a direct readout of the SPI ROM chip attached to a motherboard, known internally as the "Fugu" (Japanese for pufferfish—fitting for a console that bloated in interesting ways). scph-70004 bios v12 eur 200.bin
