Difference between revisions of "DS11 Multiple Line Synchronous Interface"

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(Gleaned a bit more from the manual)
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The '''DS11 Multiple Line Synchronous Interface''' was an early [[synchronous serial line]] [[peripheral|interface]] for the [[UNIBUS]]; it could handle up to 16 lines. It used [[programmed I/O]] (with separate receive and transmit [[interrupt]]s) to transfer data; it could operate in either [[half-duplex]] or [[full-duplex]] mode.  
 
The '''DS11 Multiple Line Synchronous Interface''' was an early [[synchronous serial line]] [[peripheral|interface]] for the [[UNIBUS]]; it could handle up to 16 lines. It used [[programmed I/O]] (with separate receive and transmit [[interrupt]]s) to transfer data; it could operate in either [[half-duplex]] or [[full-duplex]] mode.  
  
−
It provided an [[EIA RS-232 serial line interface|EIA RS-232]] interface to Bell 200 series [[modem]]s (such as the model 201, and equivalents), and also connect to Bell 300 series modems, such as the model 303. Character lengths of 6, 8 and 12 bits were supported, and could be configured by software.  
+
Character lengths of 6, 8 and 12 bits were supported, and could be configured by software. It provided an [[EIA RS-232 serial line interface|EIA RS-232]] interface to Bell 200 series [[modem]]s (such as the model 201, and equivalents), and also connect to Bell 300 series modems, such as the model 303.
  
−
It consisted of a master line scanner, and up to four adapters, each of which could handle up to four lines; each line had a separate [[DEC card form factor|quad]] M7110 Line Control Module. It used an [[M105 Address Selector]] to set its bus address. Physically, it is a large quad-height [[backplane]], mounted in a 19" cabinet such as an [[H960 rack|H950]], along with an [[DEC indicator panel]].
+
<!--
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optionally a [[20mA current loop serial line interface|current loop]] interface (to Bell 300 series modems, such as the model 303, and equivalents). [[Baud rate]]s of up to 9.6K bits/second were supported by the EIA interface, and up to 100K bits/second by the current loop interface.
  
−
<!--
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The [[character]] length (5, 6, 7 or 8 [[bit]]s), and the [[sync character]], were selectable; [[parity]] (even or odd) was optionally supported for error detection. All configuration, as well as all the modem control leads, could be set under program control. A [[jumper]] allows configuration of whether one or two contiguous sync characters is needed for synchronization.
−
It provided an [[EIA RS-232 serial line interface|EIA RS-232]] interface (to Bell 200 series [[modem]]s, such as the model 201, and equivalents), and optionally a [[20mA current loop serial line interface|current loop]] interface (to Bell 300 series modems, such as the model 303, and equivalents). [[Baud rate]]s of up to 9.6K bits/second were supported by the EIA interface, and up to 100K bits/second by the current loop interface.
 
  
−
The [[character]] length (5, 6, 7 or 8 [[bit]]s), and the [[sync character]], were selectable; [[parity]] (even or odd) was optionally supported for error detection. All configuration, as well as all the modem control leads, could be set under program control. A [[jumper]] allows configuration of whether one or two contiguous sync characters is needed for synchronization.
+
It apparently supported idling (sending the sync character); the line could also be set to a [[serial line|mark]] condition when not transmitting characters.
−
<!-- It apparently supported idling (sending the sync character); the line could also be set to a [[serial line|mark]] condition when not transmitting characters.
 
 
-->
 
-->
 
==Registers==
 
==Registers==
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{{16bitoctal-bitout}}
 
{{16bitoctal-bitout}}
  
−
* TDBUF - Transmitter Data Buffer -->
+
* TDBUF - Transmitter Data Buffer
 +
 
 +
-->
 +
==Implementation==
 +
 
 +
The DS11 consisted of a master line scanner, and up to four adapters, each of which could handle up to four lines; each line had a separate [[DEC card form factor|quad]] M7110 Line Control Module. Physically, it is a large quad-height [[backplane]], mounted in a 19" cabinet such as an [[H960 rack|H950]], along with the DS11's [[DEC indicator panel]].
 +
 
 +
The DS11, like some other early UNIBUS peripherals, was made of many small [[FLIP CHIP]]s. The inventory of the card types in the DS11 is:
 +
 
 +
* G830 5V, 10A Regulator from 8V
 +
* M002 Resistor network
 +
* M126 6 x AND-NOR Gates
 +
* M128 4,4 AND-NOR Gates
 +
* M139 3 x 8-Input NAND Gates
 +
* M143 10 x 2-Input NAND Gates
 +
* M145 7 x 3-Input NAND Gates
 +
* M147 5 x 4-Input, 1 x 2-Input NAND Gates
 +
* M152 Dual Non-inverting Binary to Octal with Enable
 +
* M165 Memory buffer, Inverting and Non-inverting Output
 +
* M171 2-2-2-3 AND-NOR
 +
* M173 10 x 2-input AND gates
 +
* M174 4 En x 9 out mixer
 +
* M175 7 x 3-input AND gates
 +
* M177 5 x 4-Input AND Gates
 +
* M178 8 En x 6 out mixer
 +
* M181 Non-inverting 2-2-2-3 AND-NOR
 +
* M211 6-Bit Up/Down Counter
 +
* M241 6 x D Flip-flops with common clock
 +
* M243 8 x D Flip-flops with 2 common clocks
 +
* M246 5 x D Flip-Flops
 +
* M253 16 Word, 12-bit Memory
 +
* M307 Integrating One Shot
 +
* M321 Tapped Delay Line
 +
* M362 Delay, 25 to 50 ns
 +
* M401 Variable Clock
 +
* M603 Pulse Amplifiers
 +
* M612 6 Power Gates
 +
* M783 UNIBUS Drivers
 +
* M784 UNIBUS Receiver
 +
* M785 UNIBUS Transceiver
 +
* M931 15 Terminators
 +
* M969 24 Level Terminators
 +
* M511 UNIBUS Receivers - sources differ as to whether or not this is used
 +
* W990 Connectors
 +
* [[M105 Address Selector]] - used to set its bus address
 +
* [[M782 Interrupt Control|M7820 Interrupt Control]]
 +
* M7110 Line Control Module - one per line
 +
 
 +
The number of each type used is currently unknown; likewise the locations in the backplane (except the M7110's)
  
 
{{semi-stub}}
 
{{semi-stub}}
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* [http://bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-10-XSRMA-A-D%20DECsystem10%20System%20Reference%20Manual.pdf DECsystem-10 System Reference Manual] - documents the DS11 registers in Appendix C (pp. 370-371 of the PDF)
 
* [http://bitsavers.org/www.computer.museum.uq.edu.au/pdf/DEC-10-XSRMA-A-D%20DECsystem10%20System%20Reference%20Manual.pdf DECsystem-10 System Reference Manual] - documents the DS11 registers in Appendix C (pp. 370-371 of the PDF)
 
* [http://www.bitsavers.org/pdf/dec/modules/mSeries/M7110.pdf M7110]
 
* [http://www.bitsavers.org/pdf/dec/modules/mSeries/M7110.pdf M7110]
 +
<!-- * [http://www.bitsavers.org/pdf/dec/modules/mSeries/M511.pdf M511] -->
  
 
[[Category: UNIBUS Synchronous Serial Interfaces]]
 
[[Category: UNIBUS Synchronous Serial Interfaces]]

Revision as of 21:02, 19 November 2023

The DS11 Multiple Line Synchronous Interface was an early synchronous serial line interface for the UNIBUS; it could handle up to 16 lines. It used programmed I/O (with separate receive and transmit interrupts) to transfer data; it could operate in either half-duplex or full-duplex mode.

Character lengths of 6, 8 and 12 bits were supported, and could be configured by software. It provided an EIA RS-232 interface to Bell 200 series modems (such as the model 201, and equivalents), and also connect to Bell 300 series modems, such as the model 303.

Registers

Register Abbreviation Address
Receiver Status Register RxCSR 775xx0
Receiver Data Buffer Register RxDBUF 775xx2
Transmitter Status Register TxCSR 775xx4
Transmitter Data Buffer Register TxDBUF 775xx6

Line addresses:

  • Line 0: 775400-775406
...
  • Line 15: 775570-775576

Implementation

The DS11 consisted of a master line scanner, and up to four adapters, each of which could handle up to four lines; each line had a separate quad M7110 Line Control Module. Physically, it is a large quad-height backplane, mounted in a 19" cabinet such as an H950, along with the DS11's DEC indicator panel.

The DS11, like some other early UNIBUS peripherals, was made of many small FLIP CHIPs. The inventory of the card types in the DS11 is:

  • G830 5V, 10A Regulator from 8V
  • M002 Resistor network
  • M126 6 x AND-NOR Gates
  • M128 4,4 AND-NOR Gates
  • M139 3 x 8-Input NAND Gates
  • M143 10 x 2-Input NAND Gates
  • M145 7 x 3-Input NAND Gates
  • M147 5 x 4-Input, 1 x 2-Input NAND Gates
  • M152 Dual Non-inverting Binary to Octal with Enable
  • M165 Memory buffer, Inverting and Non-inverting Output
  • M171 2-2-2-3 AND-NOR
  • M173 10 x 2-input AND gates
  • M174 4 En x 9 out mixer
  • M175 7 x 3-input AND gates
  • M177 5 x 4-Input AND Gates
  • M178 8 En x 6 out mixer
  • M181 Non-inverting 2-2-2-3 AND-NOR
  • M211 6-Bit Up/Down Counter
  • M241 6 x D Flip-flops with common clock
  • M243 8 x D Flip-flops with 2 common clocks
  • M246 5 x D Flip-Flops
  • M253 16 Word, 12-bit Memory
  • M307 Integrating One Shot
  • M321 Tapped Delay Line
  • M362 Delay, 25 to 50 ns
  • M401 Variable Clock
  • M603 Pulse Amplifiers
  • M612 6 Power Gates
  • M783 UNIBUS Drivers
  • M784 UNIBUS Receiver
  • M785 UNIBUS Transceiver
  • M931 15 Terminators
  • M969 24 Level Terminators
  • M511 UNIBUS Receivers - sources differ as to whether or not this is used
  • W990 Connectors
  • M105 Address Selector - used to set its bus address
  • M7820 Interrupt Control
  • M7110 Line Control Module - one per line

The number of each type used is currently unknown; likewise the locations in the backplane (except the M7110's)

See also

Further reading

  • DS11 Multiple Line Synchronous Interface Maintenance Manual (DEC-00-DS11-DB; not available online, but in fiche)

External links

Retrieved from "https://gunkies.org/w/index.php?title=DS11_Multiple_Line_Synchronous_Interface&oldid=31916"