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

Jnc: more specific cat; clarify functionality

2021-11-08T15:17:45Z

more specific cat; clarify functionality

Larsbrinkhoff: Meow.

2021-11-08T10:16:14Z

Meow.

Jnc: link 1822

2021-11-03T01:10:04Z

link 1822

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

2021-10-30T04:14:13Z

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

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

2021-10-30T04:06:14Z

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

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]]

@@ Line 1: / Line 1: @@
-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==
@@ Line 88: / Line 88: @@
 | colspan=16 | WC15 <---> WC00
 {{16bit-bitout}}
 ==External links==

@@ Line 1: / Line 1: @@
-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==
@@ Line 93: / Line 93: @@
 * [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]]

← Older revision		Revision as of 10:16, 8 November 2021
Line 94:		Line 94:

	[[Category: UNIBUS Network Interfaces]]		[[Category: UNIBUS Network Interfaces]]
		+	[[Category: ARPANET]]

@@ Line 60: / Line 60: @@
 ===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
+| ERR || NXM || WC0 || colspan=3 | Unused || TMRE || ODBE || RDY || IE || colspan=2 | XBA16-17 || BBM || ELB || ORST || GO
 {{16bit-bitout}}
 ===0767612: Data Buffer Out Register (DBRO)===

@@ 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)===