Talk:General-purpose input/output

2007
Anyone know what "compounded by the resemblance to GP1 and GP0" means? Can we clarify this?Paul Foxworthy 12:33, 4 September 2007 (UTC)

Is the input/output states (voltages) defined for GPIO? Is it a 3 or 5v TTL type input? Are they generally tied either up or down so all we need to do is ground (or short to power) to get them to trigger? Are they standard at all.... or is each person's GPIO interface unique? --CaveMole 22:49, 11 September 2007 (UTC)
 * I doubt it's universal, but AVRs have 5V TTL GPIOs. --Josh Atkins (talk - contribs) 11:08, 31 August 2008 (UTC)

Types of GPIO
Are not x86 25-pin DB-9F parallel ports (commonly named “LPT”) also some sort of GPIO if you reuse the port's 8 output and 4 input (this many in SPP mode) for “hobbyist” work? —j.engelh (talk) 16:12, 12 March 2009 (UTC)