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|0v||14||14||!NMI | |0v||14||14||!NMI | ||
|- | |- | ||
|NC||15||15||!HALT | |[[#Removed Video Outputs|NC]]||15||15||!HALT | ||
|- | |- | ||
|NC||16||16||!MREQ | |[[#Removed Video Outputs|NC]]||16||16||!MREQ | ||
|- | |- | ||
|NC||17||17||!IORQ | |[[#Removed Video Outputs|NC]]||17||17||!IORQ | ||
|- | |- | ||
|NC||18||18||!RD | |[[#Removed Video Outputs|NC]]||18||18||!RD | ||
|- | |- | ||
|!BUSRQ||19||19||!WR | |!BUSRQ||19||19||!WR | ||
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* Upper Pin 23 is connected to the oscillating voltage within the internal power supply circuitry. This is nominally 12 volts AC. | * Upper Pin 23 is connected to the oscillating voltage within the internal power supply circuitry. This is nominally 12 volts AC. | ||
* Lower Pins 6, 7, and 14 are connected to the 0 volt rail. | * Lower Pins 6, 7, and 14 are connected to the 0 volt rail. | ||
====Removed Video Outputs==== | |||
Unlike the [[ZX Spectrum 16k/48k]] the [[ZX Spectrum+ 128K]] [[The Spectrum ULA|ULA]] generates RGB and Bright video signals rather than intensity and colour difference signals. The !Y, U, and V signals are therefore not available so the pins previously used for them are left unconnected. Additionally the composite video signal has been removed. |