Editing Amstrad CPC 464 (section)

==Technical specifications==
The CPC 464 is powered by the [[Zilog Z80]] processor<ref name=obseletecomputermuseum>{{cite web|title=Amstrad CPC464|url=http://www.obsoletecomputermuseum.org/amstrad/|website=Obsolete Computer Museum|accessdate=20 July 2016}}</ref> after the original attempts to use the 6502 processor, being used in the [[Apple II]] amongst many other 8-bit computer families, failed.<ref name=yourenotfired/> The Z80 runs at 4&nbsp;MHz, has 64&nbsp;KB of memory and runs [[AMSDOS]], Amstrad's own [[operating system|OS]]. The unit includes a built-in [[tape drive]] and the choice of a colour or green monochrome monitor.<ref name=obseletecomputermuseum/>
 
The graphics, which uses a [[Motorola 6845]] chip for timing and address generation, provides 3 standard display modes, each using colours chosen from a [[List_of_monochrome_and_RGB_color_formats#3-level_RGB|palette of 27]].<ref name=retrogamer/><ref name=cpcwikivideo>{{cite web|title=CPC old generation: Video (graphics): modes, outputs|url=https://www.cpcwiki.eu/index.php/CPC_old_generation#Video_.28graphics.29:_modes.2C_outputs|website=CPC Wiki|accessdate=2019-07-30}}</ref>
*Mode 0 - 160×200, 16 colours
*Mode 1 - 320×200, 4 colours
*Mode 2 - 640x200, 2 colours

Its sound is supplied using the [[General Instrument]] [[AY-3-8912]] sound chip that provides 3-voice, 8-octave sound capacity through a built-in loudspeaker with volume control. Later versions of the 464 have a headphone jack that can also be used for external speakers.<ref name=retrogamer/>

The CPC 464's code name during development was 'Arnold'.<ref name=oldcomputers/><ref name=obseletecomputermuseum/>