ZX Spectrum +2A/2B, +3/3B edge connector: Difference between revisions

ZX Spectrum +2A/2B, +3/3B edge connector (view source)

334 bytes added , 6 November 2012

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	====RESET====		====RESET====
	... This ~~is waiting for some information about~~ the ~~+2B..~~.		The RESET signal is an inverted version of the NRST signal, and is produced by one of the inverters in IC15. The purpose of this signal is unclear since any peripheral could derive it by inverting the NRST line iself. In the +3 it is connected via a 10k resistor (R76) to the floppy drive select line. This however seems to be an error in the circuit design though it has no adverse effects.