LH-DH/11 Local/Distant Host Controller - Revision history

Jnc: Typo; tense; See also MLH-DH/LSI11

2025-02-04T11:07:56Z

Typo; tense; See also MLH-DH/LSI11

← Older revision		Revision as of 11:07, 4 February 2025
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	The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[1822 interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a UNIBUS machine to connect to anything that provided a BBN-1822 bit-serial interface; most commonly as [[IMP interface]]s to [[ARPANET]] [[Interface Message Processor\|~~IMP~~]]s, but also to [[Packet Radio Network]] interfaces.		The '''LH-DH/11 Local/Distant Host Controller''' was a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[1822 interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a UNIBUS machine to connect to anything that provided a BBN-1822 bit-serial interface; most commonly as [[IMP interface]]s to [[ARPANET]] [[Interface Message Processor\|IMPs]], but also to [[Packet Radio Network]] interfaces.

	It ~~consists~~ of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters ~~allow~~ use as either a Local Host or Distant Host 1822 interface; [[BC11A UNIBUS cable\|BC11A cables]] ~~connect~~ it to the rest of the system.		It consisted of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ped boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there was also an internal [[power supply]]. Level converters allowed use as either a Local Host or Distant Host 1822 interface; [[BC11A UNIBUS cable\|BC11A cables]] connected it to the rest of the system.

	==Registers==		==Registers==
Line 88:		Line 88:
	\| colspan=16 \| WC15 <---> WC00		\| colspan=16 \| WC15 <---> WC00
	{{16bit-bitout}}		{{16bit-bitout}}

			==See also==

			* [[MLH-DH/LSI11 Multiple Channel Controller]] - [[QBUS]] equivalent

	==External links==		==External links==

Jnc: more specific cat; clarify functionality

2021-11-08T15:17:45Z

more specific cat; clarify functionality

← Older revision		Revision as of 15:17, 8 November 2021
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	The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[~~IMP~~ interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a [[~~UNIBUS~~]] ~~machine~~ to ~~connect to an~~ [[ARPANET]] [[Interface Message Processor\|IMP]].		The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[1822 interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a UNIBUS machine to connect to anything that provided a BBN-1822 bit-serial interface; most commonly as [[IMP interface]]s to [[ARPANET]] [[Interface Message Processor\|IMP]]s, but also to [[Packet Radio Network]] interfaces.

	It consists of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters allow use as either a Local Host or Distant Host [[1822 interface]]; [[BC11A UNIBUS cable\|BC11A cables]] connect it to the rest of the system.		It consists of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters allow use as either a Local Host or Distant Host 1822 interface; [[BC11A UNIBUS cable\|BC11A cables]] connect it to the rest of the system.

	==Registers==		==Registers==
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	* [http://www.bitsavers.org/pdf/advancedComputerCommunications/ACC-LHDH11_Maintenance_Manual_Volume_1_Apr1984.pdf Local/Distant Host Controller LH-DH/11C and LH-DH/11B Maintenance Manual]		* [http://www.bitsavers.org/pdf/advancedComputerCommunications/ACC-LHDH11_Maintenance_Manual_Volume_1_Apr1984.pdf Local/Distant Host Controller LH-DH/11C and LH-DH/11B Maintenance Manual]

			[[Category: 1822 Interfaces‎]]
	[[Category: UNIBUS Network Interfaces]]		[[Category: UNIBUS Network Interfaces]]
	~~[[Category: ARPANET]]~~

Larsbrinkhoff: Meow.

2021-11-08T10:16:14Z

Meow.

← Older revision		Revision as of 10:16, 8 November 2021
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	[[Category: UNIBUS Network Interfaces]]		[[Category: UNIBUS Network Interfaces]]
			[[Category: ARPANET]]

Jnc: link 1822

2021-11-03T01:10:04Z

link 1822

← Older revision		Revision as of 01:10, 3 November 2021
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	The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[IMP interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a [[UNIBUS]] machine to connect to an [[ARPANET]] [[Interface Message Processor\|IMP]].		The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access\|DMA]] [[UNIBUS]] [[IMP interface]] produced by [[Advanced Computer Communications‎\|ACC]] to allow a [[UNIBUS]] machine to connect to an [[ARPANET]] [[Interface Message Processor\|IMP]].

	It consists of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters allow use as either a Local Host or Distant Host interface; [[BC11A UNIBUS cable\|BC11A cables]] connect it to the rest of the system.		It consists of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic\|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters allow use as either a Local Host or Distant Host [[1822 interface]]; [[BC11A UNIBUS cable\|BC11A cables]] connect it to the rest of the system.

	==Registers==		==Registers==

Jnc: /* 0767610: Control & Status Out Register (CSRO) */ add bits

2021-10-30T04:14:13Z

0767610: Control & Status Out Register (CSRO): add bits

← Older revision		Revision as of 04:14, 30 October 2021
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	===0767610: Control & Status Out Register (CSRO)===		===0767610: Control & Status Out Register (CSRO)===
	{{16bit-header}}		{{16bit-header}}
	\| ERR \|\| NXM \|\| WC0 \|\| colspan=3 \| Unused \|\| TMRE \|\| ODBE \|\| RDY \|\| IE \|\| colspan=2 \| XBA16-17 \|\| BBM \|\| ELB \|\| ~~IRST~~ \|\| GO		\| ERR \|\| NXM \|\| WC0 \|\| colspan=3 \| Unused \|\| TMRE \|\| ODBE \|\| RDY \|\| IE \|\| colspan=2 \| XBA16-17 \|\| BBM \|\| ELB \|\| ORST \|\| GO
	{{16bit-bitout}}		{{16bit-bitout}}

			* ERR - Error Flag
			* NXM - Non-Existent Memory
			* WC0 - Word Count = 0
			* TMRE - Transmit Master Ready Error
			* ODBE - Output Data Buffer Empty
			* RDY - Device Ready
			* IE - Interrupt Enable
			* BBM - Bus-Back Mode
			* ELB - Enable Last Bit
			* ORST - Output Interface Reset

	===0767612: Data Buffer Out Register (DBRO)===		===0767612: Data Buffer Out Register (DBRO)===

Jnc: /* 0767600: Control & Status In Register (CSRI) */ add bits

2021-10-30T04:06:14Z

0767600: Control & Status In Register (CSRI): add bits

@@ Line 29: / Line 29: @@
 | ERR || NXM || EOM || Unused || HR || INR || RMRE || IDBF || RDY || IE || colspan=2 | XBA16-17 || SENB || HRC || IRST || GO
 {{16bit-bitout}}
 ===0767602: Data Buffer In Register (DBRI)===

Jnc: Basics

2021-10-29T23:29:28Z

Basics

New page

The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access|DMA]] [[UNIBUS]] [[IMP interface]] produced by [[Advanced Computer Communications‎|ACC]] to allow a [[UNIBUS]] machine to connect to an [[ARPANET]] [[Interface Message Processor|IMP]].

It consists of a 10-1/2" rack [[mounting box]] holding a pair of [[wire-wrap]]ed boards (one for [[packet]] input, and one for output), holding a number of SSI [[transistor-transistor logic|TTL]] [[integrated circuit]]s; there is also an internal [[power supply]]. Level converters allow use as either a Local Host or Distant Host interface; [[BC11A UNIBUS cable|BC11A cables]] connect it to the rest of the system.

==Registers==

{| border=1
! Register !! Abbreviation !! Address
|-
|Control & Status In Register || CSRI || 0767600
|-
|Data Buffer In Register || DBRI || 0767602
|-
|Current Word Address In Register || CWAI || 0767604
|-
|Word Count In Register || WCI || 0767606
|-
|Control & Status Out Register || CSRO || 0767610
|-
|Data Buffer Out Register || DBRO || 0767612
|-
|Current Word Address Out Register || CWAO || 0767614
|-
|Word Count Out Register || WCO || 0767616
|}

===0767600: Control & Status In Register (CSRI)===
{{16bit-header}}
| ERR || NXM || EOM || Unused || HR || INR || RMRE || IDBF || RDY || IE || colspan=2 | XBA16-17 || SENB || HRC || IRST || GO
{{16bit-bitout}}

===0767602: Data Buffer In Register (DBRI)===
{{16bit-header}}
| colspan=16 | Data15 <---> Data00
{{16bit-bitout}}

===0767604: Current Word Address In Register (CWAI)===
{{16bit-header}}
| colspan=16 | WA15 <---> WA00
{{16bit-bitout}}

===0767606: Word Count In Register (WCI)===
{{16bit-header}}
| colspan=16 | WC15 <---> WC00
{{16bit-bitout}}

===0767610: Control & Status Out Register (CSRO)===
{{16bit-header}}
| ERR || NXM || WC0 || colspan=3 | Unused || TMRE || ODBE || RDY || IE || colspan=2 | XBA16-17 || BBM || ELB || IRST || GO
{{16bit-bitout}}

===0767612: Data Buffer Out Register (DBRO)===
{{16bit-header}}
| colspan=16 | Data15 <---> Data00
{{16bit-bitout}}

===0767614: Current Word Address Out Register (CWAO)===
{{16bit-header}}
| colspan=16 | WA15 <---> WA00
{{16bit-bitout}}

===0767616: Word Count Out Register (WCO)===
{{16bit-header}}
| colspan=16 | WC15 <---> WC00
{{16bit-bitout}}

==External links==

* [http://www.bitsavers.org/pdf/advancedComputerCommunications/ACC-LHDH11_Maintenance_Manual_Volume_1_Apr1984.pdf Local/Distant Host Controller LH-DH/11C and LH-DH/11B Maintenance Manual]

[[Category: UNIBUS Network Interfaces]]