Editing Currah (section)

===Technical details===
The unit contained a [[Uncommitted Logic Array|ULA]] which worked on a WRITE command from the microprocessor, a [[Read-only memory|ROM]] containing the keyword speech patterns, and an [[General Instrument SP0256-AL2|SP0256-AL2]] speech processor. It also contained a clock for clear speech and an audio modulator to transfer the sound to the TV lead.  A small adjustment screw was provided, to allow fine tuning of the audio output.

The unit allocated itself the top 256 bytes of memory at switch-on and moved down the USR graphics and RAMTOP.  This made it incompatible with some programs, particularly games, which use that space for machine code.

For cost reasons, the unit did not provide for [[daisy chain (information technology)|daisy-chaining]] of further devices on the computer's expansion port.  Many [[joystick]] [[computer bus|interface]] manufacturers took the same approach, meaning that you could not have a joystick and the MicroSpeech unit plugged in at the same time.

''Booty'' ([[Firebird Software Ltd.|Firebird Software Ltd]]) detected the presence of a MicroSpeech unit and presented the user with a completely different game to that which would be played if the MicroSpeech unit was not present.<ref>{{cite web |title=Booty Hidden Game Review |url=http://zxplanet.emuunlim.com/booty_hidden_game.htm |access-date=2012-11-02 |website=ZX Planet - RELIVE YOUR CHILDHOOD |publisher=}}</ref>