Talk:Channel I/O

message: A diagram could help clarify and remove ambiguity. I feel unclear about what components there are, and the relationship between them, or the physical connections between them.
Rsamot (talk) 03:21, 12 June 2012 (UTC)
thread_title:  Diagram of Basic Principles Section 

message: The first channel is usually considered to be the IBM 709's model 766 data synchronizer, shipped in about 1957.  The 7090, announced in 1958 and shipped in 1969 supported the 766 and also the more advanced 7607 channel and 7606 multiplexor. These both significantly predate the 6600 which didn't ship until 1964. See http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_PP7090B.html John L 20:36, 16 September 2007 (UTC)
thread_title:  First channel 

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thread_title:  External links modified 

message: I know there have been discussions of this elsewhere. Even IBM has been inconsistent; The original IBM System/360 System Summary  (1964) uses "multiplexor".
On the other hand this article is not IBM-specific. The google ngram viewer shows "multiplexer" with a significant lead—at one point 2 to one and now about 10 to 1. Perhaps we should use "multiplexer" consistently and then list "multiplexor" as an alternate spelling. Comments? Peter Flass (talk) 21:25, 19 January 2018 (UTC)
replies: text: I put the one in the talk page for CTCA, as adaptor vs. adapter. More recently I found one related to power plugs and sockets, again adaptor vs. adapter.  There is a WP:MOS related to British vs. American English.  In that case, one is supposed to be consistent, and continue on with the existing form.  There might also be one related to era appropriate usage. When did IBM make the change?  In the case of CTCA, I put in the redirect, but that is only needed when it is in the title.  My thought here is to consistently use adaptor, as IBM did over most of the years when the subject was being developed. Gah4 (talk) 21:35, 19 January 2018 (UTC)
replies: text: At least one RS regatding adapter/adaptor states that "They are used interchangeably in all varieties of English and in all their meanings, ..."  A Google search of the Wikipedia site shows about a 2:1 usage of adapter vs adaptor which suggests for Wikipedia this is a matter of style.  If so, then MOS:STYLERET should apply, that is, either spelling is acceptable unless there is a "substantial reason" for a change.  IMO, consistency within an article might be a substantial reason.  Tom94022 (talk) 20:28, 20 January 2018 (UTC)
thread_title:  Multiplexer vs Multiplexor 

message: See #Too IBM Specific? and Talk:Execute_Channel_Program#Duplicate_info for discussion. Peter Flass (talk) 16:19, 6 December 2019 (UTC)
thread_title:  Duplicate info 

message: Channel I/O#History states  However, both the CDC 1604 and UNIVAC 1107 were well before that. Shmuel (Seymour J.) Metz Username:Chatul (talk) 13:02, 31 March 2021 (UTC)
thread_title:  First non-IBM channel 

message: I believe that #Types of channels should be organized as
# Minimal
## CDC 6600
##* Channel has no DMA
##* Channels assembles/disassembles 12-bit bytes
# single block
## 7607 on IBM 7090
## CDC 3600
## UNIVAC 1107
# chained
## IBM 7030
## IBM 7070
# programmed
## 7909 on IBM 7090
## IBM System/360[[Channel I/O# and successors
### Parallel channels
#### Byte Multiplexor channels
#### Selector channels
#### Block multiplor channels
### ESCON
### FICON
I'm not sure what to do about Externally Specified Index (ESI) on, e.g., UNIVAC 490. I also don't know how many examples to give of each type.
Similarly, #Channel program should be split into separate section. --Shmuel (Seymour J.) Metz Username:Chatul (talk) 19:12, 3 February 2022 (UTC)
thread_title:  Organization of article