DM11-BB Modem Control Option - Revision history

Jnc: New cat scheme

2023-02-18T02:15:07Z

New cat scheme

2022-11-23T22:18:02Z

better img loc

2022-11-19T17:16:33Z

‎Further reading: typo

2022-11-19T05:29:06Z

better img layout

2022-08-18T15:40:42Z

New cat

2022-03-29T15:58:53Z

+M7807/M7808 imgs; clarify

2022-01-13T09:37:55Z

‎External links: found some eng drws in DH11 prints

2021-08-11T10:20:50Z

‎External links: +manual

2021-08-10T19:59:44Z

‎DM11-BB Device registers: +Register bits

2020-12-27T14:56:59Z

‎Implementation: typo

← Older revision		Revision as of 02:15, 18 February 2023
Line 148:		Line 148:
	* [http://www.bitsavers.org/pdf/dec/unibus/DH11_EngrDrws_Jul76.pdf DH11 Engineering Drawings] - contains some early DM11-BB engineering drawings on pp. 99-125; late DM11-BB on pp. 165-178		* [http://www.bitsavers.org/pdf/dec/unibus/DH11_EngrDrws_Jul76.pdf DH11 Engineering Drawings] - contains some early DM11-BB engineering drawings on pp. 99-125; late DM11-BB on pp. 165-178

−	[[Category: UNIBUS ~~Serial Interfaces]]~~	+	[[Category: UNIBUS Asynchronous Serial Interfaces]]
−	~~[[Category: DEC~~ Asynchronous Serial Interfaces]]

@@ Line 10: / Line 10: @@
 ==DM11-BB Device registers==
 {| border=1
@@ Line 56: / Line 54: @@
 ==Implementation==
 The early version of the DM11-BB was connected to the DM11 distribution panel via flat cables which carried the modem control signals, which ran from the M7247 card (two per card) to [[DEC card form factor|single-width]] M971 cards which plugged into the backplane of the DM11 distribution panel (one for each group of 4 lines). The DM11-BB boards (all dual-width) were:
@@ Line 66: / Line 66: @@
 * [[M782 Interrupt Control|M7820]] - Interrupt control
 * [[M105 Address Selector|M105]] - Address selection
 ===DM11 board locations===
@@ Line 125: / Line 126: @@
 ===Later DM11-BB implementation===
-[[Image:DM11-BBM7808.jpg|thumb|right|250px|M7808 Mux and Modem Scan Control card of 'later' DM11-BB]]
+[[Image:H317BUncovered.jpg|thumb|right|250px|H317-B passive distribution panel with cover off]]
 The 'later' DM11-BB used two new quad-width boards (the DH11 backplane, etc, were otherwise identical):

@@ Line 140: / Line 140: @@
 ==Further reading==
-* ''DMll-BB Modem Control Option Engineering Drawings'' (not available online)
+* ''DM11-BB Modem Control Option Engineering Drawings'' (not available online)
 ==External links==

@@ Line 1: / Line 1: @@
 The '''DM11-BB Modem Control Option''' worked with several early [[UNIBUS]] [[asynchronous serial line]] [[peripheral]]s to allow the lines to be connected to [[modem]]s. It could be set to [[interrupt]] the [[Central Processing Unit|CPU]] when a modem control line (Ring, Carrier, etc) changed state.
@@ Line 4: / Line 6: @@
 There were two different versions of the DM11-BB (unfortunately, there is no accepted naming system for them). The DM11 and early models of the DH11 used the 'early version' of the DM11-BB; it used an 'active' (powered) [[DM11 distribution panel]] backplane. Modular 'line conditioning' units were plugged into the distribution panel backplane to allow support of [[EIA RS-232 serial line interface|EIA RS-232]] serial lines connected to modems.
 Later DH11s used the 'new version' of the DM11-BB, which was [[program compatible]] with the early version, but included built-in EIA level conversion, allowing the use of a passive (un-powered) H317-B distribution panel.
 ==DM11-BB Device registers==
 {| border=1
@@ Line 64: / Line 66: @@
 * [[M782 Interrupt Control|M7820]] - Interrupt control
 * [[M105 Address Selector|M105]] - Address selection
 ===DM11 board locations===

← Older revision		Revision as of 15:40, 18 August 2022
Line 148:		Line 148:

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]
		+	[[Category: DEC Asynchronous Serial Interfaces]]

@@ Line 133: / Line 133: @@
 * [[DM11-BA Modem Control Multiplexor]]
 ==External links==
 * [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HDMBA-A-D%20DM11-BB%20Modem%20Control%20Option%20Manual.pdf DEC-11-HDMBA-A-D DM11-BB modem control option manual]
 [[Category: UNIBUS Serial Interfaces]]

← Older revision		Revision as of 10:20, 11 August 2021
Line 133:		Line 133:

	* [[DM11-BA Modem Control Multiplexor]]		* [[DM11-BA Modem Control Multiplexor]]
		+
		+	==External links==
		+
		+	* [http://www.bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-11-HDMBA-A-D%20DM11-BB%20Modem%20Control%20Option%20Manual.pdf DEC-11-HDMBA-A-D DM11-BB modem control option manual]

	[[Category: UNIBUS Serial Interfaces]]		[[Category: UNIBUS Serial Interfaces]]

@@ Line 19: / Line 19: @@
 |}
-The addresses shown are for the first DM11-BB in a system; additional ones (up to 16 total) are normally set to be at 770504, 770510, etc to 770674.
+The addresses shown are for the first DM11-BB in a system; additional ones (up to 16 total) are normally set to be at 770504, 770510, etc to 770674. It used one [[interrupt vector]], allocated from the [[floating device vectors]].
 ===770500: Control and Status Register (DMCSR)===
@@ Line 25: / Line 25: @@
 | RING || CARR || CTS || SREC || CLRSC || CLRMUX || MAINT || STEP || DONE || IE || SCEN || Unused || colspan=4 | Line
 {{16bitoctal-bitout}}
 ===770502: Line Status Register (DMLSR)===
 {{16bit-header}}
-| colspan=8 | Unused || RING || CARR || CTS || SREC || STX || RTS ||DTR || LEN
+| colspan=8 | Unused || RING || CARR || CTS || SREC || STX || RTS || DTR || LEN
 {{16bitoctal-bitout}}
 ==Implementation==

@@ Line 33: / Line 33: @@
 ==Implementation==
-The early version of the DH11-BB was connected to the DM11 distribution panel via flat cables which carried the modem control signals, which ran from the M7247 card (two per card) to [[DEC card form factor|single-width]] M971 cards which plugged into the backplane of the DM11 distribution panel (one for each group of 4 lines). The DM11-BB boards (all dual-width) were:
+The early version of the DM11-BB was connected to the DM11 distribution panel via flat cables which carried the modem control signals, which ran from the M7247 card (two per card) to [[DEC card form factor|single-width]] M971 cards which plugged into the backplane of the DM11 distribution panel (one for each group of 4 lines). The DM11-BB boards (all dual-width) were:
 * M7246 - Scan