Jnc: /* External links */ +TM

2023-02-17T12:39:28Z

‎External links: +TM

Jnc: New cat scheme

2023-02-16T01:41:21Z

New cat scheme

Jnc: New cat

2022-08-15T19:22:08Z

New cat

Jnc: Fairly complete (from what little info is available)

2021-08-13T19:40:08Z

Fairly complete (from what little info is available)

New page

The '''DUV11 Line Interface''' is a [[synchronous serial line]] [[peripheral|interface]] for the [[QBUS]]. It used [[programmed I/O]] (with separate receive and transmit [[interrupt]]s) to transfer data; it was double-[[buffer]]ed for both input and output.

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). [[Baud rate]]s of up to 9.6K bits/second were supported by the EIA 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. It could also be set to discard additional incoming sync characters; it could operate in either [[half-duplex]] or [[full-duplex]] mode. All configuration, as well as all the modem control leads, could be set under program control. A switch allows configuration of whether one or two contiguous sync characters is needed for synchronization. 

It was a [[DEC card form factor|quad-width]] card, the '''M7591'''; a [[Berg connector|Berg header]] on the card provided the 'native' EIA interface. For operation without a modem, an external [[clock]] could be used; a switch-selectable option also allowed the use of an internal clock.

==Registers==

{| border=1
! Register !! Abbreviation !! Address
|-
|Receiver Status Register || RxCSR || 16xx10
|-
|Receiver Data Buffer Register (read only) || RxDBUF || 16xx12
|-
|Parameter Control Register (write only) || PARCSR || 16xx12
|-
|Transmitter Status Register || TxCSR || 16xx14
|-
|Transmitter Data Buffer Register || TxDBUF || 16xx16
|}

The address should be allocated from the [[floating device address space‎]]; it is factory-configured to 0160010. It uses a single [[interrupt vector]] (for 'done'), which should be allocated from the [[floating device vectors‎]]; it is factory-configured to 0440.


==See also==

* [[DU11 synchronous serial line interface]]

[[Category: QBUS Serial Interfaces]]

← Older revision		Revision as of 12:39, 17 February 2023
Line 100:		Line 100:

	* [[DU11 synchronous serial line interface]]		* [[DU11 synchronous serial line interface]]
		+
		+	==Further reading==
		+
		+	* ''DUV11 User Manual'' (EK-DUV11-OP) - not available online
		+	* ''DUV11 Field Maintenance Print Set'' (MP-00297) - not available online
		+
		+	==External links==
		+
		+	* [http://bitsavers.org/pdf/dec/qbus/EK-DUV11-TM-001_DUV11_Line_Interface_Technical_Manual_Aug77.pdf DUV11 line interface technical manual] (EK-DUV11-TM)-001

	[[Category: QBUS Synchronous Serial Interfaces]]		[[Category: QBUS Synchronous Serial Interfaces]]

← Older revision		Revision as of 01:41, 16 February 2023
Line 101:		Line 101:
	* [[DU11 synchronous serial line interface]]		* [[DU11 synchronous serial line interface]]

−	[[Category: QBUS ~~Serial Interfaces]]~~	+	[[Category: QBUS Synchronous Serial Interfaces]]
−	~~[[Category: DEC~~ Synchronous Serial Interfaces]]

← Older revision		Revision as of 19:22, 15 August 2022
Line 102:		Line 102:

	[[Category: QBUS Serial Interfaces]]		[[Category: QBUS Serial Interfaces]]
		+	[[Category: DEC Synchronous Serial Interfaces]]

DUV11 Line Interface - Revision history

Jnc: /* External links */ +TM

Jnc: New cat scheme

Jnc: New cat

Jnc: Fairly complete (from what little info is available)