DHV11 asynchronous serial line interface - Revision history

Jnc: New cat scheme

2023-02-17T09:33:29Z

New cat scheme

Jnc: New cat

2022-08-17T00:59:12Z

New cat

Jnc: /* External links */ +VAXarchive

2022-08-15T14:08:16Z

‎External links: +VAXarchive

Jnc: +remote distribution panel, register bits

2022-02-02T14:58:06Z

+remote distribution panel, register bits

Jnc: replaced by DHQ11; use MANX prints

2022-01-30T13:57:18Z

replaced by DHQ11; use MANX prints

Jnc: /* External links */ +manual, FMPS

2022-01-30T13:49:48Z

‎External links: +manual, FMPS

Jnc: Save another image

2021-08-26T10:39:23Z

Save another image

Jnc: +img

2021-03-26T16:13:03Z

+img

Jnc: /* Device registers */ +missing

2021-01-01T15:05:13Z

‎Device registers: +missing

Jnc: Correct input buffer size

2020-12-31T13:30:04Z

Correct input buffer size

← Older revision		Revision as of 09:33, 17 February 2023
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	* [http://www.vaxarchive.org/hardware/dhv11/index.html DHV11 (M3104)]		* [http://www.vaxarchive.org/hardware/dhv11/index.html DHV11 (M3104)]

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

← Older revision		Revision as of 00:59, 17 August 2022
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	[[Category: QBUS Serial Interfaces]]		[[Category: QBUS Serial Interfaces]]
		+	[[Category: DEC Asynchronous Serial Interfaces]]

@@ Line 118: / Line 118: @@
 * [http://www.vaxhaven.com/images/6/6b/EK-DHV11-MC.pdf DHV11 Maintenance Card] (EK-DHV11-MC)
 * [https://manx-docs.org/collections/hcps/dhv11.pdf DHV11 Field Maintenance Print Set] (MP01793)
 [[Category: QBUS Serial Interfaces]]

@@ Line 1: / Line 1: @@
 [[Image:DHV11.jpg|350px|thumb|right|DHV11 M3104 board]]
-The '''DHV11 asynchronous serial line interface''' is the first [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface|DH11]] (it was later replaced by the [[DHQ11 asynchronous serial line interface|DHQ11]]). It provided 8 [[EIA RS-232 serial line interface|RS-232]] [[asynchronous serial line]]s. Output used [[Direct Memory Access|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer|FIFO buffer]].
+The '''DHV11 asynchronous serial line interface''' is the first [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface|DH11]]. It provided 8 [[EIA RS-232 serial line interface|RS-232]] [[asynchronous serial line]]s, with full [[modem]] control, depending on the cabling option chosen (below). Output used [[Direct Memory Access|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer|FIFO buffer]].
 It was later replaced by the [[DHQ11 asynchronous serial line interface|DHQ11]], which could be set to exactly [[program compatible|emulate]] either the DHV11 or the [[DHU11 asynchronous serial line interface|DHU11]].
 ==Device registers==
@@ Line 14: / Line 10: @@
 * the QBUS has a larger [[address space]] than the UNIBUS, so it needs two [[word]]-sized registers to hold the output buffer [[address]];
-* the DHV11 includes several [[microprocessor]]s, and has extended capabilities, including a [[diagnostic]] sealf-test, and [[flow control]] support;
+* the DHV11 includes several [[microprocessor]]s, and has extended capabilities, including a [[diagnostic]] self-test, and [[hardware]] in-band [[flow control]] support (on both input and output);
-* the DHV11 has the ability to transmit under program control.
+* the DHV11 has the ability to transmit under program data movement.
 {| border=1
@@ Line 38: / Line 34: @@
 |Transmit Buffer Count Register         || TBCT || 17760456
 |}
 The RBUF and TXC share an address; the RBUF is read only, and the TXC is write only.
@@ Line 57: / Line 55: @@
 *RXIE - Receive Interrupt Enable
 *MR - Master Reset
-*Line - Select TXC through TBCT
+*Line - Select line register set (TXC through TBCT)
 === Line Parameter Register (LPR)===
@@ Line 63: / Line 61: @@
 | colspan=4 | TSpeed || colspan=4 | RSpeed || STOP || EVEN || PARE || colspan=2 | CLEN || colspan=2 | DICD || Unused
 {{16bitoctal-bitout}}
 ===Line Status Register (STAT)===
@@ Line 68: / Line 70: @@
 | DSR || Unused || RI || DCD || CTS || colspan=2 | Unused || DHU || colspan=8 | Not Present
 {{16bitoctal-bitout}}
 === Line Control Register (CTRL)===
@@ Line 74: / Line 78: @@
 {{16bitoctal-bitout}}
-[[Image:M3104.jpg|150px|left|thumb|Another DHV11 board]]
+*LTYP - Link Type
 <!-- ==Further reading==

@@ Line 2: / Line 2: @@
 The '''DHV11 asynchronous serial line interface''' is the first [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface|DH11]] (it was later replaced by the [[DHQ11 asynchronous serial line interface|DHQ11]]). It provided 8 [[EIA RS-232 serial line interface|RS-232]] [[asynchronous serial line]]s. Output used [[Direct Memory Access|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer|FIFO buffer]].
 ==Implementation==
@@ Line 9: / Line 11: @@
 ==Device registers==
-The [[register]]s in the DHQ11 are somewhat different from those in the DH11:
+The [[register]]s in the DHV11 are somewhat different from those in the DH11:
 * the QBUS has a larger [[address space]] than the UNIBUS, so it needs two [[word]]-sized registers to hold the output buffer [[address]];
-* the DHQ11 includes several [[microprocessor]]s, and has extended capabilities, including a [[diagnostic]] sealf-test, and [[flow control]] support;
+* the DHV11 includes several [[microprocessor]]s, and has extended capabilities, including a [[diagnostic]] sealf-test, and [[flow control]] support;
-* the DHQ11 has the ability to transmit under program control.
+* the DHV11 has the ability to transmit under program control.
 {| border=1
@@ Line 82: / Line 84: @@
 * [http://www.bitsavers.org/pdf/dec/qbus/EK-DHV11-TM-002.pdf DHV11 Technical Manual] (EK-DHV11-TM-002)
 * [http://www.vaxhaven.com/images/6/6b/EK-DHV11-MC.pdf DHV11 Maintenance Card] (EK-DHV11-MC)
-* [https://oldcomputers.dyndns.org/public/pub/rechner/dec/manuals/decimages/dhv11.pdf DHV11 Field Maintenance Print Set] (MP01793)
+* [https://manx-docs.org/collections/hcps/dhv11.pdf DHV11 Field Maintenance Print Set] (MP01793)
 [[Category: QBUS Serial Interfaces]]

← Older revision		Revision as of 16:13, 26 March 2021
Line 1:		Line 1:
		+	[[Image:DHV11.jpg\|350px\|thumb\|right\|DHV11 M3104 board]]
		+
	The '''DHV11 asynchronous serial line interface''' is the first [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface\|DH11]] (it was later replaced by the [[DHQ11 asynchronous serial line interface\|DHQ11]]). It provided 8 [[EIA RS-232 serial line interface\|RS-232]] [[asynchronous serial line]]s. Output used [[Direct Memory Access\|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer\|FIFO buffer]].		The '''DHV11 asynchronous serial line interface''' is the first [[QBUS]] equivalent to the [[UNIBUS]] [[DH11 asynchronous serial line interface\|DH11]] (it was later replaced by the [[DHQ11 asynchronous serial line interface\|DHQ11]]). It provided 8 [[EIA RS-232 serial line interface\|RS-232]] [[asynchronous serial line]]s. Output used [[Direct Memory Access\|DMA]] (with each line having its own [[buffer]] [[pointer]] and count); input used a 256-character [[First-In First-Out buffer\|FIFO buffer]].