This is the Mayumi 4 installation I used with a PIC12C508A on an SCPH-7502 PlayStation with a PU-22 motherboard.

There are eight solder points in total.

The mode sequence is:

Strongest Mode -> Old Modchip Mode -> Disable Mode

Hold reset for around two seconds to change modes.

Configuration recorded for this build:

WDT_OFF, ExtRC_OSC, MCLR_OFF

This installation is specific to the motherboard and PIC combination shown here.

Related posts

• Sony PlayStation Modchip Overview

• [Mayumi 4

  PIC12F629

  SCPH-7502

  PU-22](/mayumi-4-pic12f629-scph-7502-pu-22/)

• [Mayumi 4

  PIC12C508A

  SCPH-5502

  PU-18](/mayumi-4-pic12c508a-scph-5502-pu-18/)

• Creating a Sony PlayStation Modchip

Back to the modchip installation guide list