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=== ZX Spectrum +2B and +3B ===
The ''ZX Spectrum +2B'' and ''ZX Spectrum +3B'' were functionally similar in design to the Spectrum +2A and +3.<ref>''Spectrum +2B/+3B Service Manual''. AMSTRAD.</ref> The main electronic differences being simply changes to the generation of the audio output signal to resolve problems with [[Clipping (audio)|clipping]] and the removal of the external tape loading input ("ear" pin).
Unlike the +2A the Spectrum +2B motherboard (AMSTRAD part number Z70833) does not have provision for floppy disk controller circuitry so cannot be assembled as a +3B. The +3B motherboard is Amstrad part number Z70835.
* From and Amstrad CPC user's point of view the ZX Spectrum is well known for being the source of [[Speccy Port|Speccy Ports]].
* The Spectrum +2 case design is comparable to the CPC464's case design because of the internal datacorder. The Spectrum +3 case design is comparable to shares some similarities with the CPC6128's , the case design because of the is similar with it's internal 3" disc drive, and the disc controller is the same as the CPC6128's. The CPC464 and CPC6128 came before these Spectrum's, so it is clear Amstrad used their knowledge and experience those as inspirations to alter update the Spectrum design in this way. === Links === * http://scratchpad.wikia.com/wiki/ZX_Spectrum_technical_information
[[Category: Non CPC Computers| ]][[Category:Amstrad Products|*]][[Category:CPC History]]
