Editing Amstrad CPC 664 Troubleshooting Guide (section)

== References ==

* [https://archive.org/details/Amstrad_CPC664_Service_Manual_1985_Amstrad_Consumer_Electronics Amstrad CPC664 Service Manual] (1985, Amstrad Consumer Electronics). Source for the disc drive schematic, disc-area circuit diagram, the FDC connections to the Z80 bus, and the electrical parts list.
* [https://www.amstrad-noob.com/2020/02/08/replacing-the-fdd-drive-belt-on-the-new-cpc-664/ Replacing the FDD drive belt on the new CPC 664], Amstrad noob. Field-experience source for the drive-belt failure mode and replacement.
* [https://www.cpcwiki.eu/index.php/765_FDC NEC uPD765A FDC], CPCWiki. Reference for the FDC pinout and the CPC-specific Z80 interface.
* [https://www.cpcwiki.eu/index.php/CRTC CPC CRTC types], CPCWiki. Reference for the Type 0/1/2/3/4 CRTC family and the implications for software compatibility.
* [https://www.grimware.org/doku.php/documentations/hardware/amstrad.cpc464 Amstrad CPC hardware documentation], Grimware. Reference for the Gate Array, the connector pinouts and the shared 464/664/6128 architecture.

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