Talk:Multidrop bus

"but electronically are limited to [...] and 10–20 cm distance (SCSI-1 has 6 meters)."

What is this trying to say? It jumps from talking in of a 20cm limit, to talking a limit of a 6m implementation, as if this follows logically.

Is it possibly a typo? Should it read "10-20m"? The examples listed would suggest that 20cm is wrong. 81.179.128.128 12:39, 7 July 2007 (UTC)

What Vending Machines have to do with multidrop protocol? I think this info doesn't belong here. —Preceding unsigned comment added by 217.159.252.225 (talk) 20:22, 10 January 2009 (UTC)

This article conflates the use of the concept of a multi-drop bus with the specific implementation in vending machines. It may be a good idea to either split this into two articles, or to at least disambiguate. 188.99.213.221 (talk) 14:56, 3 December 2009 (UTC)

This page does in no way explain what what multidrop bus is nor does it reveal the concept of multidrop. The reference to multidrop on networking is lacking, since the referenced paragraph does not even mention the word. —Preceding unsigned comment added by 193.45.212.118 (talk) 06:00, 25 May 2010 (UTC)

Isn't this just a bus network? I would think these pages should be merged or this one deleted. --173.36.196.10 (talk) 18:16, 28 March 2012 (UTC)

multi-drop bus for vending

I added a lot to this section as I was developing vending equipment employing this standard in the 1980s on NEC-V20 processors (X86 compatible) and am now developing vending systems with coin, cash, debit, credit, and crypto-currency payments (including Bitcoin #BTC) using STM32F10x embedded controllers. I've worked with MDB when it was a proprietary protocol, and when it was standardized. I can't locate references for some of the information (yet) though I know I have seen a history of MDB on the web or in a document somewhere recently, which discussed the strange politics around Coke forcing Coinco to open-up their proprietary technology to competitors. I corrected an error which said the protocol was invented in 1992. It was well entrenched by 1992, but that was the year that it was publicly released. By 1990 I had deployed vending equipment on 4 continents using MDB for the coin-acceptor interface. --Bempey (talk) 07:13, 11 February 2014 (UTC) by Brian Empey, P.Eng., President, Techsol Engineering Inc.

multi-drop communications lines

Multi-drop also refers to communications lines, especially RS-485 (single-pair, half-duplex) and RS-422 (2-pair, full-duplex)--Bempey (talk) 07:11, 11 February 2014 (UTC). This probaby should be a separate article. Peter Flass (talk) 17:19, 7 June 2012 (UTC)