Difference between revisions of "LH-DH/11 Local/Distant Host Controller"
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| − | The '''LH-DH/11 Local/Distant Host Controller''' is a [[Direct Memory Access|DMA]] [[UNIBUS]] [[ | + | 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 | + | 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]] | ||
Latest revision as of 16:17, 8 November 2021
The LH-DH/11 Local/Distant Host Controller is a DMA UNIBUS 1822 interface produced by ACC to allow a UNIBUS machine to connect to anything that provided a BBN-1822 bit-serial interface; most commonly as IMP interfaces to ARPANET IMPs, but also to Packet Radio Network interfaces.
It consists of a 10-1/2" rack mounting box holding a pair of wire-wraped boards (one for packet input, and one for output), holding a number of SSI TTL integrated circuits; there is also an internal power supply. Level converters allow use as either a Local Host or Distant Host 1822 interface; BC11A cables connect it to the rest of the system.
Contents
- 1 Registers
- 1.1 0767600: Control & Status In Register (CSRI)
- 1.2 0767602: Data Buffer In Register (DBRI)
- 1.3 0767604: Current Word Address In Register (CWAI)
- 1.4 0767606: Word Count In Register (WCI)
- 1.5 0767610: Control & Status Out Register (CSRO)
- 1.6 0767612: Data Buffer Out Register (DBRO)
- 1.7 0767614: Current Word Address Out Register (CWAO)
- 1.8 0767616: Word Count Out Register (WCO)
- 2 External links
Registers
| 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)
| ERR | NXM | EOM | Unused | HR | INR | RMRE | IDBF | RDY | IE | XBA16-17 | SENB | HRC | IRST | GO | |
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
- ERR - Error Flag
- NXM - Non-Existent Memory
- EOM - End of Message
- HR - Host Ready
- INR - IMP Not Ready
- RMRE - Receive Master Ready Error
- IDBF - Input Data Buffer Full
- RDY - Device Ready
- IE - Interrupt Enable
- SENB - Store Enable
- HRC - Host Relay Control
- IRST - Input Interface Reset
0767602: Data Buffer In Register (DBRI)
| Data15 <---> Data00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
0767604: Current Word Address In Register (CWAI)
| WA15 <---> WA00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
0767606: Word Count In Register (WCI)
| WC15 <---> WC00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
0767610: Control & Status Out Register (CSRO)
| ERR | NXM | WC0 | Unused | TMRE | ODBE | RDY | IE | XBA16-17 | BBM | ELB | ORST | GO | |||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
- 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)
| Data15 <---> Data00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
0767614: Current Word Address Out Register (CWAO)
| WA15 <---> WA00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
0767616: Word Count Out Register (WCO)
| WC15 <---> WC00 | |||||||||||||||
| 15 | 14 | 13 | 12 | 11 | 10 | 09 | 08 | 07 | 06 | 05 | 04 | 03 | 02 | 01 | 00 |
