Error screens: Difference between revisions

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[[File:discioerror2.jpg|thumb]]
See [[system self-test]].
[[File:error_cram.jpg|thumb]]
[[File:error_calendar.jpg|thumb]]
[[File:error_vram.jpg|thumb]]
[[File:error_z80.jpg|thumb]]


==DISC I/O ERROR ID = 0000==
*"WARNING BANK ERROR": [[Cartridge self-checking]]. Cartridge edge dirty, bad 74LS74 for [[bankswitching]].
 
*"WARNING COPYRIGHT MESSAGE": [[Slot check security]]. Clear backup RAM. Bad [[uPD4990]]. Bad [[system ROM]].
Normally happens right before a loading screen. This error is thrown when a file requested for loading isn't found in the CD table of contents (should never happen on an original CD, except if the TOC zone is physically damaged).
 
If the CD is an original one, it's certainly dirty or scratched.
 
If the CD is a copy, it's certainly re-authored (not an exact copy of an original). Even if the files are the same, the CD image structure can be altered and detected.
 
This is the case for games using file versions in their ISO 9660 structure, like [[Metal Slug 2]]. Most Windows ISO image editors strip the versioning info which is needed by the game to identify the files. Use [[mkisofs]] '''WITHOUT THE -N FLAG'''or edit the loading tables in the main PRG file.
 
==MVS==
 
*"WARNING BANK ERROR": [[Cartridge_self-checking]]. Cartridge dirty, bad 74LS74 for [[bankswitching]].
*"WARNING COPYRIGHT MESSAGE": [[Slot_check_security]]. Clear backup RAM. Bad [[uPD4990]]. Bad [[BIOS]] ROM.
*"Z80 ERROR": [[Z80 ERROR]]
See [[BIOS Self-tests]].


[[Category:Repairs]]
[[Category:Repairs]]

Latest revision as of 04:44, 12 October 2016

See system self-test.

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