Editing Sinclair ZX Spectrum +2 (section)

== What Amstrad changed ==

Compared with the Spectrum 128 "Toastrack", the +2 adds:<ref name="sfe" /><ref name="tyne">Tynemouth Software, [http://blog.tynemouthsoftware.co.uk/2017/06/spectrum-128k-2-grey-repairs.html "Spectrum 128K +2 Grey Repairs"]. Source for the RAM IC mapping between 48K and +2 numbering, the AY/TEA2000/40057 chip roles, typical current draw, and repair observations.</ref>

* An integral '''"Datacorder"''' cassette deck, replacing the external tape recorder.
* Two '''joystick ports''' using the Sinclair (not Atari) pinout, driven by the '''Amstrad 40057''' — essentially the MT62001 used in the Interface 2.
* A conventional grey case with a proper keyboard, in place of the Toastrack's separate heatsink and rubber-key styling.

Everything else — the Z80A, the ULA, the 128 KB banked RAM, the AY-3-8912A sound chip and the 32 KB ROM — is carried over from the 128.<ref name="sfe" />