Editing DSP
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Used for signal processing as part of the CD/DVD drive. Not to be confused with [[MechaCon]] in this matter, which | Used for signal processing as part of the CD/DVD drive. Not to be confused with [[MechaCon]] in this matter, which controls and adjusts the drive mechanics and the laser among other functions. | ||
DSP firmware resides in a mask-ROM inside the DSP. Several firmware versions might exist for the same DSP hardware revision. | DSP firmware resides in a mask-ROM inside the DSP. Several firmware versions might exist for the same DSP hardware revision. | ||
At least one version of the DSP's firmware (specifically the CXD3098Q) has a tendency to crash MechaCon by sheer bad luck or on badly readable discs (e.g. badly burned/low-quality DVD-R discs or scratched | At least one version of the DSP's firmware (specifically the CXD3098Q) has a tendency to crash MechaCon by sheer bad luck or on badly readable discs (e.g. badly burned/low-quality DVD-R discs or scratched originals), overvolting the focus/tracking coils of the laser and killing them and also the driver IC in the process. Several hardware-based mitigations/"fixes" have been developed by the community to address this issue with varying degrees of success. The most well known of these fixes have been the "Romeo-mod"/"LA-fix" for SCPH-5XXXX consoles and "summ0ne's fix" for SCPH-70XXX consoles; however, the most reliable fix is the Matrix PIC fix which monitors communication between DSP and MechaCon and turns off the console when a crash occurs. | ||
== Revisions == | == Revisions == | ||
*CXD1869Q (GH-001, GH-003) | *CXD1869Q (GH-001, GH-003) | ||
* | ** ''GH-008?'' | ||
*CXD1869AQ (GH-004, GH-005, GH-006, GH-007 | *CXD1869AQ (GH-004, GH-005, GH-006, GH-007, GH-010, GH-012, GH-013, GH-014) | ||
*CXD1869BQ (GH-010, GH-012, GH-013, GH-014) | *CXD1869BQ (GH-010, GH-012, GH-013, GH-014) | ||
*CXD1886Q (GH-013, GH-014, GH-015, GH-016) | *CXD1886Q (GH-013, GH-014, GH-015, GH-016) | ||
*CXD3098Q (GH-017, GH-018, GH-019, GH-022, GH-023, GH-026, GH-027, GH-029, GH-032, GH-035, GH-036, GH-037, GH-040, GH-041, GH-051, GH-052, XPD-001, XPD-005) | |||
** Has a bug in the firmware which causes MechaCon to freeze when bad sectors are read (e.g. on burnt or scratched discs). This likelyhood is increased on Dragon-[[MechaCon]], thus SCPH-5XXXX and up. Some later subrevisions of GH-032 and GH-035 implement some circuitry to prevent this from happening. | |||
*CXD3098Q (GH-017, GH-018, GH-019, GH-022, GH-023, GH-026, GH-027, GH-029, GH-032, GH-035, GH-036, GH-037, GH-040, GH-041, GH-051, GH-052 | *CXD3098AQ (GH-061, GH-062, GH-070, GH-071, GH-072) | ||
** Has a | |||
*CXD3098AQ ( | |||