DZV11 asynchronous serial line interface - Revision history

Jnc: New cat scheme

2023-02-17T09:36:00Z

New cat scheme

Jnc: New cat

2022-08-17T01:00:15Z

New cat

Jnc: /* Cabling */ earlier version of dist panel

2022-02-14T20:30:31Z

‎Cabling: earlier version of dist panel

Jnc: Manuals, FMPS, chip details

2021-11-18T16:41:32Z

Manuals, FMPS, chip details

Jnc: typo

2021-03-26T23:17:32Z

typo

Jnc: +img

2021-03-26T23:13:30Z

+img

Jnc: /* Cabling */ Clarify confsion between two similar parts

2021-01-06T16:14:33Z

‎Cabling: Clarify confsion between two similar parts

Jnc: Fairly complete

2021-01-03T03:21:58Z

Fairly complete

New page

The '''DZV11''' was a [[QBUS]] four port [[asynchronous serial line]] mux card for [[Digital Equipment Corporation|DEC]] computers; the QBUS equivalent of the [[UNIBUS]] [[DZ11 asynchronous serial line interface‎|DZ11]] (with which it is [[program compatible]]). Like the original, it used used [[programmed I/O]], and thus could present a considerable load on the [[Central Processing Unit|CPU]] when running a high speed line.

A 64-entry [[First-In First-Out buffer|FIFO buffer]] silo was provided on the input side. The DZV11 could operate with [[full-duplex]] [[modem]]s. It provided program-set [[baud rate]]s (up to 9600 baud), but not split speed. [[Break]] could be detected or generated on each line.

==Implementation==

Physically, it was a [[DEC card form factor|quad]] card, the M7957; a cable plugged into a [[Berg connector]] header on the card led the lines out of the computer. The pin assignments in the Berg header are mirrored, so that if the mating Berg connector is plugged in backwards, the only result is to invert the line numbering.

Initially, a special BC11U-25 cable was used; it consisted of 4 separate round cables, from a Berg connector, to individual [[EIA RS-232 serial line interface#Connectors|DB25 male connectors]] (DB-25P) wired as DTEs.

A later alternative to the BC11U consisted of a [[flat cable]] from a Berg connector to a distribution panel ([[DEC part numbers|DEC part number]] 70-19964), holding 4 DB25 male connectors. (The distribution panel may be recognized by the part number on its [[printed circuit board|PCB]], 50-15419.)

==Device registers==

{| border=1
! Register !! Abbreviation !! Address
|-
|Control and Status Register || CSR || 760100
|-
|Receiver Buffer Register* || RBUF || 760102
|-
|Line Parameter Register* || LPR || 760102
|-
|Transmit Control Register || TCR || 760104
|-
|Modem Status Register || MSR || 760106
|-
|Transmit Data Register || TDR || 760106
|}

The RBUF and LPR share an address, as do the MSR and TDR: the RBUF is read only, and the LPR is write only; the MSR is read only, and the TDR is write only. Registers marked with a '*' are [[word]]-width only, no byte operations.

The [[address]]es shown are for the first DZ11 in a system (provided that there are no other devices in the [[floating device address space]]); additional ones are normally set to be at 760110, 760120, etc.

===Control and Status Register (CSR)===
{{16bit-header}}
| TRDY || TIE || SA || SAE || colspan=2 |Unused || colspan=2 | Tx Line || RDONE || RIE || MSE || CLR || MAINT || colspan=3 | Unused
{{16bitoctal-bitout}}

*TRDY - Transmitter Ready
*TIE - Transmitter Interrupt Enable
*SA - Silo Alarm
*SAE - Silo Alarm Enable
*Tx Line - Line ready to transmit
*RDONE - Received Done
*RIE - Receiver Interrupt Enable
*MSE - Master Scan Enable
*CLR - Clear input FIFO, CSR and [[UART]]s
*MAINT - Maintenance loopback enabled

=== Receiver Buffer Register (RBUF)===
{{16bit-header}}
| DV || OVR || FRERR || PERR || colspan=2 | Unused || colspan=2 | Rx Line || colspan=8 | RBUF
{{16bitoctal-bitout}}

=== Line Parameter Register (LPR)===
{{16bit-header}}
| colspan=3 | Unused || RXON || colspan=4 | Speed || ODDP || PAREN || STOP || colspan=2 | CLEN || Unused || colspan=2 | Line
{{16bitoctal-bitout}}

===Transmit Control Register (TCR)===
{{16bit-header}}
| colspan=4 | Unused || colspan=4 | DTR || colspan=4 | Unused || colspan=4 | Line Enabled
{{16bitoctal-bitout}}

=== Modem Status Register (MSR)===
{{16bit-header}}
| colspan=4 | Unused || colspan=4 | CD || colspan=4 | Unused || colspan=4 | RI
{{16bitoctal-bitout}}

=== Transmit Data Register (TDR)===
{{16bit-header}}
| colspan=4 | Unused || colspan=4 | Break || colspan=8 | TBUF
{{16bitoctal-bitout}}

==Further reading==

* ''DZV11 User Guide'', EK-DZV11-UG-002
* ''DZV11 Technical Manual'', EK-DZV11-TM-001

[[Category: QBUS Serial Interfaces]]

← Older revision		Revision as of 09:36, 17 February 2023
Line 88:		Line 88:
	* [https://manx-docs.org/collections/hcps/dzv11.pdf DZV11 Field Maintenance Print Set] (MP-00462)		* [https://manx-docs.org/collections/hcps/dzv11.pdf DZV11 Field Maintenance Print Set] (MP-00462)

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

← Older revision		Revision as of 01:00, 17 August 2022
Line 89:		Line 89:

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

@@ Line 13: / Line 13: @@
 Initially, a special BC11U-25 cable was used; it consisted of 4 separate round cables, from a Berg connector, to individual [[EIA RS-232 serial line interface#Connectors|DB25 male connectors]] (DB-25P) wired as DTEs.
-A later alternative to the BC11U consisted of a [[flat cable]] from the Berg connector on the card to another on a 4-port [[distribution panel]] ([[DEC part numbers|DEC part number]] 70-19964), holding DB25 male connectors. (The distribution panel may be recognized by the part number on its [[printed circuit board|PCB]], 50-15419; the part number for the complete assembly is 54-15420.)
+A later alternative to the BC11U consisted of a [[flat cable]] from the Berg connector on the card to another on a 4-port [[distribution panel]] ([[DEC part numbers|DEC part number]] 70-19964) which held DB-25P male connectors. (The distribution panel may be recognized by the part number on its [[printed circuit board|PCB]], 50-15419; the part number for the complete assembly is 54-15420. An earlier version has PCB part number 50-14824, and assembly 54-14825.)
 ==Device registers==

← Older revision		Revision as of 23:17, 26 March 2021
Line 1:		Line 1:
−	Image:DZV11.jpg\|350px\|thumb\|right\|~~DHV11~~ M7957 board]]	+	[[Image:DZV11.jpg\|350px\|thumb\|right\|DZV11 M7957 board]]

	The '''DZV11''' was a [[QBUS]] four port [[asynchronous serial line]] mux card for [[Digital Equipment Corporation\|DEC]] computers; the QBUS equivalent of the [[UNIBUS]] [[DZ11 asynchronous serial line interface‎\|DZ11]] (with which it is [[program compatible]]). Like the original, it used used [[programmed I/O]], and thus could present a considerable load on the [[Central Processing Unit\|CPU]] when running a high speed line.		The '''DZV11''' was a [[QBUS]] four port [[asynchronous serial line]] mux card for [[Digital Equipment Corporation\|DEC]] computers; the QBUS equivalent of the [[UNIBUS]] [[DZ11 asynchronous serial line interface‎\|DZ11]] (with which it is [[program compatible]]). Like the original, it used used [[programmed I/O]], and thus could present a considerable load on the [[Central Processing Unit\|CPU]] when running a high speed line.

← Older revision		Revision as of 23:13, 26 March 2021
Line 1:		Line 1:
		+	Image:DZV11.jpg\|350px\|thumb\|right\|DHV11 M7957 board]]
		+
	The '''DZV11''' was a [[QBUS]] four port [[asynchronous serial line]] mux card for [[Digital Equipment Corporation\|DEC]] computers; the QBUS equivalent of the [[UNIBUS]] [[DZ11 asynchronous serial line interface‎\|DZ11]] (with which it is [[program compatible]]). Like the original, it used used [[programmed I/O]], and thus could present a considerable load on the [[Central Processing Unit\|CPU]] when running a high speed line.		The '''DZV11''' was a [[QBUS]] four port [[asynchronous serial line]] mux card for [[Digital Equipment Corporation\|DEC]] computers; the QBUS equivalent of the [[UNIBUS]] [[DZ11 asynchronous serial line interface‎\|DZ11]] (with which it is [[program compatible]]). Like the original, it used used [[programmed I/O]], and thus could present a considerable load on the [[Central Processing Unit\|CPU]] when running a high speed line.

@@ Line 78: / Line 78: @@
 {{16bitoctal-bitout}}
-==Further reading==
+==Details information==
-* ''DZV11 User Guide'', EK-DZV11-UG-002
+The DZV11 uses the DEC [[LSI-11 Bus interface chips]]; the DZV11 technical manual (below) includes detailed descriptions of all of them in Appendix A, 'IC Descriptions' - along with a detailed description of the [[Universal Asynchronous Receiver/Transmitter‎|UART]] [[integrated circuit|chip]], used across essentially all DEC asynchronous serial line cards of this generation.
-* ''DZV11 Technical Manual'', EK-DZV11-TM-001
 [[Category: QBUS Serial Interfaces]]

@@ Line 5: / Line 5: @@
 ==Implementation==
-Physically, it was a [[DEC card form factor|quad]] card, the M7957; a cable plugged into a [[Berg connector]] header on the card led the lines out of the computer. The pin assignments in the Berg header are mirrored, so that if the mating Berg connector is plugged in backwards, the only result is to invert the line numbering.
+Physically, it was a [[DEC card form factor|quad]] card, the M7957; a cable plugged into a 40-pin [[Berg connector]] header on the card led the lines out of the computer. The pin assignments in the Berg header are mirrored, so that if the mating Berg connector is plugged in backwards, the only result is to invert the line numbering.
 Initially, a special BC11U-25 cable was used; it consisted of 4 separate round cables, from a Berg connector, to individual [[EIA RS-232 serial line interface#Connectors|DB25 male connectors]] (DB-25P) wired as DTEs.
-A later alternative to the BC11U consisted of a [[flat cable]] from a Berg connector to a distribution panel ([[DEC part numbers|DEC part number]] 70-19964), holding 4 DB25 male connectors. (The distribution panel may be recognized by the part number on its [[printed circuit board|PCB]], 50-15419.)
+A later alternative to the BC11U consisted of a [[flat cable]] from the Berg connector on the card to another on a 4-port [[distribution panel]] ([[DEC part numbers|DEC part number]] 70-19964), holding DB25 male connectors. (The distribution panel may be recognized by the part number on its [[printed circuit board|PCB]], 50-15419; the part number for the complete assembly is 54-15420.)
 ==Device registers==