BDV11 Bus Terminator/ROM - Revision history

Jnc: /* Further reading */ +Location of W13 on the BDV11

2024-07-28T18:45:44Z

Further reading: +Location of W13 on the BDV11

← Older revision		Revision as of 18:45, 28 July 2024
Line 42:		Line 42:
	* Add a wire from BE1 (BDAL20) to E1 pin 13		* Add a wire from BE1 (BDAL20) to E1 pin 13
	* Add a wire from BF1 (BDAL21) to E1 pin 12		* Add a wire from BF1 (BDAL21) to E1 pin 12

			==Further reading==

			* ''Location of W13 on the BDV11'', [[MicroNote]] #057

	==External links==		==External links==

Jnc: Avoid redirs; typos

2024-06-24T08:05:59Z

Avoid redirs; typos

← Older revision		Revision as of 08:05, 24 June 2024
Line 11:		Line 11:
	The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control [[register]], allows the entire contents to be seen.		The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control [[register]], allows the entire contents to be seen.

	In addition, the board provides a pair of [[DIP switch]]es (readable under program control, except for one used for KW11-L functionality control); and also a set of red [[~~LED~~]]s, a 'power OK' green LED, on-board RESET and HALT/ENABLE switches, and test points for on-board voltages. All of the latter are on the card edge, so they are accessible when it is plugged in. A single read/write [[register]] is provided for diagnostic purposes.		In addition, the board provides a pair of [[DIP switch]]es (readable under program control, except for one used for KW11-L functionality control); and also a set of red [[Light Emitting Diode\|LEDs]], a 'power OK' green LED, on-board RESET and HALT/ENABLE switches, and test points for on-board voltages. All of the latter are on the card edge, so they are accessible when it is plugged in. A single read/write [[register]] is provided for diagnostic purposes.

	==KW11-L functionality==		==KW11-L functionality==
Line 25:		Line 25:
	The ''only'' thing that clears it is either a manual disable (write 0 to the KW11-L's CSR); something which toggles the BDCOK bus line - e.g. using the BDV11's on-board RESTART switch, or a front-panel restart switch; or power cycling the machine.		The ''only'' thing that clears it is either a manual disable (write 0 to the KW11-L's CSR); something which toggles the BDCOK bus line - e.g. using the BDV11's on-board RESTART switch, or a front-panel restart switch; or power cycling the machine.

	''Caveat haquur!''		'''Caveat haquur!'''

	==Board layout error==		==Board layout error==

	There is a layout error on the BDV11 which can cause damage if a BDV11 is plugged into a system with the optional -12V on pin AB2. The trace which is supposed to connect bus line BIRQ6, on pin AB1, to the pullup network is incorrectly routed to pin AB2. The [[ECO]] to repair this (DEC #2 for the BDV11) is fairly simple:		There is a layout error on the BDV11 which can cause damage if a BDV11 is plugged into a system with the optional -12V on pin AB2. The [[trace]] which is supposed to connect bus line BIRQ6, on pin AB1, to the pullup network is incorrectly routed to pin AB2. The [[Engineering Change Order\|ECO]] to repair this (DEC #2 for the BDV11) is fairly simple:

	* Cut the trace (on the solder side) between E1 pin 11 and AB2		* Cut the trace (on the solder side) between E1 pin 11 and AB2
Line 36:		Line 36:
	==Bus termination upgrade==		==Bus termination upgrade==

	The BDV11 only provides termination for a Q18 QBUS; there is a relatively easy ~~offical~~ DEC ECO (#5) to extend it to Q22, since there are 4 spare [[resistor]] networks available in one of the resistor packs. It is:		The BDV11 only provides termination for a Q18 QBUS; there is a relatively easy official DEC ECO (#5) to extend it to Q22, since there are 4 spare [[resistor]] networks available in one of the resistor packs. It is:

	* Add a wire from BC1 (BDAL18) to E1 pin ~~1-5~~		* Add a wire from BC1 (BDAL18) to E1 pin 15
	* Add a wire from BD1 (BDAL19) to E1 pin 14		* Add a wire from BD1 (BDAL19) to E1 pin 14
	* Add a wire from BE1 (BDAL20) to E1 pin 13		* Add a wire from BE1 (BDAL20) to E1 pin 13
Line 48:		Line 48:
	* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the BDV11 is covered in Appendix C (pp. 593-600 of the PDF)		* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the BDV11 is covered in Appendix C (pp. 593-600 of the PDF)
	* [http://www.bitsavers.org/pdf/dec/qbus/EK-BDV11-TM-001_Mar78.pdf BDV11 bus terminator, bootstrap, and diagnostic ROM technical manual] (EK-BDV11-TM-001)		* [http://www.bitsavers.org/pdf/dec/qbus/EK-BDV11-TM-001_Mar78.pdf BDV11 bus terminator, bootstrap, and diagnostic ROM technical manual] (EK-BDV11-TM-001)
	* [http://bitsavers.org/pdf/dec/qbus/MP00740_1123_schem_Oct81.pdf PDP-11/23 Field Maintenance Print Set] (MP00740) - BDV11-A Field Maintenance Print Set (MP00489) is on pp. 16-31 of the PDF		* [http://www.bitsavers.org/pdf/dec/qbus/MP00489_BDV11_Sep77.pdf BDV11-A Field Maintenance Print Set] (MP00489)
			<!-- * [http://bitsavers.org/pdf/dec/qbus/MP00740_1123_schem_Oct81.pdf PDP-11/23 Field Maintenance Print Set] (MP00740) - BDV11-A Field Maintenance Print Set (MP00489) is on pp. 16-31 of the PDF -->
	* [https://avitech.com.au/?page_id=3407 BDV11 Upgrade]		* [https://avitech.com.au/?page_id=3407 BDV11 Upgrade]

	[[Category: QBUS ROMs]]		[[Category: QBUS ROMs]]

Jnc: +image

2023-07-10T00:01:42Z

+image

← Older revision		Revision as of 00:01, 10 July 2023
Line 1:		Line 1:
			[[Image:BDV11.jpg\|thumb\|300px\|right\|BDV11 board]]

	The '''BDV11 Bus Terminator/ROM''' board is a [[QBUS]] board that includes:		The '''BDV11 Bus Terminator/ROM''' board is a [[QBUS]] board that includes:

Line 5:		Line 7:
	* [[KW11-L Line Time Clock]] functionality		* [[KW11-L Line Time Clock]] functionality

	Physically, it is a [[DEC card form factor\|quad]] board, the M8012.		Physically, it is a [[DEC card form factor\|quad]] board, the '''M8012'''.

	The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control register, allows the entire contents to be seen.		The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control [[register]], allows the entire contents to be seen.

	In addition, the board provides a pair of DIP ~~switches~~ (readable under program control, except for one used for KW11-L functionality control); and also a set of red [[LED]]s, a 'power OK' green LED, on-board RESET and HALT/ENABLE switches, and test points for on-board voltages. All of the latter are on the card edge, so they are accessible when it is plugged in. A single read/write [[register]] is provided for diagnostic purposes.		In addition, the board provides a pair of [[DIP switch]]es (readable under program control, except for one used for KW11-L functionality control); and also a set of red [[LED]]s, a 'power OK' green LED, on-board RESET and HALT/ENABLE switches, and test points for on-board voltages. All of the latter are on the card edge, so they are accessible when it is plugged in. A single read/write [[register]] is provided for diagnostic purposes.

	==KW11-L functionality==		==KW11-L functionality==
Line 44:		Line 46:

	* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Interfaces_Handbook_1980.pdf microcomputer interfaces handbook] - BDV11 is covered on pp. 86-113, 94-121 of the PDF		* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Interfaces_Handbook_1980.pdf microcomputer interfaces handbook] - BDV11 is covered on pp. 86-113, 94-121 of the PDF
			* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the BDV11 is covered in Appendix C (pp. 593-600 of the PDF)
	* [http://www.bitsavers.org/pdf/dec/qbus/EK-BDV11-TM-001_Mar78.pdf BDV11 bus terminator, bootstrap, and diagnostic ROM technical manual] (EK-BDV11-TM-001)		* [http://www.bitsavers.org/pdf/dec/qbus/EK-BDV11-TM-001_Mar78.pdf BDV11 bus terminator, bootstrap, and diagnostic ROM technical manual] (EK-BDV11-TM-001)
	* [http://bitsavers.org/pdf/dec/qbus/MP00740_1123_schem_Oct81.pdf PDP-11/23 Field Maintenance Print Set] (MP00740) - BDV11-A Field Maintenance Print Set (MP00489) is on pp. 16-31 of the PDF		* [http://bitsavers.org/pdf/dec/qbus/MP00740_1123_schem_Oct81.pdf PDP-11/23 Field Maintenance Print Set] (MP00740) - BDV11-A Field Maintenance Print Set (MP00489) is on pp. 16-31 of the PDF

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

2023-07-02T18:48:26Z

External links: +manual, FMPS

← Older revision		Revision as of 18:48, 2 July 2023
Line 5:		Line 5:
	* [[KW11-L Line Time Clock]] functionality		* [[KW11-L Line Time Clock]] functionality

	Physically, it is a [[DEC card form factor\|quad]] board, M8012.		Physically, it is a [[DEC card form factor\|quad]] board, the M8012.

	The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control register, allows the entire contents to be seen.		The board is normally supplied with 2KW of PROM containing diagnostic and bootstrap functionality, with an optional 2KW for more; there are also sockets available for an additional 18KW of user-supplied [[EPROM]]. This memory does not appear directly on the QBUS; a 256 word window, and a window control register, allows the entire contents to be seen.
Line 36:		Line 36:
	The BDV11 only provides termination for a Q18 QBUS; there is a relatively easy offical DEC ECO (#5) to extend it to Q22, since there are 4 spare [[resistor]] networks available in one of the resistor packs. It is:		The BDV11 only provides termination for a Q18 QBUS; there is a relatively easy offical DEC ECO (#5) to extend it to Q22, since there are 4 spare [[resistor]] networks available in one of the resistor packs. It is:

	* Add a wire from BC1 (BDAL18) to E1 pin 15		* Add a wire from BC1 (BDAL18) to E1 pin 1-5
	* Add a wire from BD1 (BDAL19) to E1 pin 14		* Add a wire from BD1 (BDAL19) to E1 pin 14
	* Add a wire from BE1 (BDAL20) to E1 pin 13		* Add a wire from BE1 (BDAL20) to E1 pin 13
	* Add a wire from BF1 (BDAL21) to E1 pin 12		* Add a wire from BF1 (BDAL21) to E1 pin 12

			==External links==

			* [http://www.bitsavers.org/pdf/dec/qbus/Digital_Microcomputer_Interfaces_Handbook_1980.pdf microcomputer interfaces handbook] - BDV11 is covered on pp. 86-113, 94-121 of the PDF
			* [http://www.bitsavers.org/pdf/dec/qbus/EK-BDV11-TM-001_Mar78.pdf BDV11 bus terminator, bootstrap, and diagnostic ROM technical manual] (EK-BDV11-TM-001)
			* [http://bitsavers.org/pdf/dec/qbus/MP00740_1123_schem_Oct81.pdf PDP-11/23 Field Maintenance Print Set] (MP00740) - BDV11-A Field Maintenance Print Set (MP00489) is on pp. 16-31 of the PDF
			* [https://avitech.com.au/?page_id=3407 BDV11 Upgrade]

	[[Category: QBUS ROMs]]		[[Category: QBUS ROMs]]

Jnc: rm bloat

2023-06-30T18:34:42Z

rm bloat

← Older revision		Revision as of 18:34, 30 June 2023
Line 40:		Line 40:
	* Add a wire from BE1 (BDAL20) to E1 pin 13		* Add a wire from BE1 (BDAL20) to E1 pin 13
	* Add a wire from BF1 (BDAL21) to E1 pin 12		* Add a wire from BF1 (BDAL21) to E1 pin 12

	~~{{PDP-11}}~~

	[[Category: QBUS ROMs]]		[[Category: QBUS ROMs]]

Jnc: avoid redir

2020-04-28T17:26:26Z

avoid redir

← Older revision		Revision as of 17:26, 28 April 2020
Line 1:		Line 1:
	The '''BDV11 Bus Terminator/ROM''' board is a [[QBUS]] board that includes:		The '''BDV11 Bus Terminator/ROM''' board is a [[QBUS]] board that includes:

	* [[bus termination]]		* [[bus]] [[terminator\|termination]]
	* [[bootstrap]]/[[diagnostic]] [[Read-only memory\|ROM]]		* [[bootstrap]]/[[diagnostic]] [[Read-only memory\|ROM]]
	* [[KW11-L Line Time Clock]] functionality		* [[KW11-L Line Time Clock]] functionality

Jnc: Avoid dab page

2019-08-18T16:01:05Z

Avoid dab page

← Older revision		Revision as of 16:01, 18 August 2019
Line 19:		Line 19:
	'''''NOTE''''': Once the KW11-L on a BDV11 has been enabled, RESET/etc do '''not''' disable it, unlike every other device in the [[PDP-11]] universe! (This is apparently because they were short a QBUS receiver for the BINIT bus line, and didn't want to add another complete chip to be able to monitor it.)		'''''NOTE''''': Once the KW11-L on a BDV11 has been enabled, RESET/etc do '''not''' disable it, unlike every other device in the [[PDP-11]] universe! (This is apparently because they were short a QBUS receiver for the BINIT bus line, and didn't want to add another complete chip to be able to monitor it.)

	So if you start some [[operating system]] which enables the KW11-L (e.g. [[UNIX]]), and then try and re-boot it by halting the machine and using the 'Go' command to [[ODT]], you'll probably get a clock [[interrupt]] in the process of booting, which will trash it.		So if you start some [[operating system]] which enables the KW11-L (e.g. [[UNIX]]), and then try and re-boot it by halting the machine and using the 'Go' command to [[QBUS CPU ODT\|ODT]], you'll probably get a clock [[interrupt]] in the process of booting, which will trash it.

	The ''only'' thing that clears it is either a manual disable (write 0 to the KW11-L's CSR); something which toggles the BDCOK bus line - e.g. using the BDV11's on-board RESTART switch, or a front-panel restart switch; or power cycling the machine.		The ''only'' thing that clears it is either a manual disable (write 0 to the KW11-L's CSR); something which toggles the BDCOK bus line - e.g. using the BDV11's on-board RESTART switch, or a front-panel restart switch; or power cycling the machine.

Jnc: better cat

2018-12-07T02:19:50Z

better cat

← Older revision		Revision as of 02:19, 7 December 2018
Line 43:		Line 43:
	{{PDP-11}}		{{PDP-11}}

	[[Category: QBUS]]		[[Category: QBUS ROMs]]

Jnc: +cat

2018-12-06T20:08:29Z

+cat

← Older revision		Revision as of 20:08, 6 December 2018
Line 42:		Line 42:

	{{PDP-11}}		{{PDP-11}}

			[[Category: QBUS]]

Jnc: /* KW11-L issue */ Front panel switches often toggle power OK, which does clear it

2018-01-16T15:17:31Z

KW11-L issue: Front panel switches often toggle power OK, which does clear it

← Older revision		Revision as of 15:17, 16 January 2018
Line 19:		Line 19:
	'''''NOTE''''': Once the KW11-L on a BDV11 has been enabled, RESET/etc do '''not''' disable it, unlike every other device in the [[PDP-11]] universe! (This is apparently because they were short a QBUS receiver for the BINIT bus line, and didn't want to add another complete chip to be able to monitor it.)		'''''NOTE''''': Once the KW11-L on a BDV11 has been enabled, RESET/etc do '''not''' disable it, unlike every other device in the [[PDP-11]] universe! (This is apparently because they were short a QBUS receiver for the BINIT bus line, and didn't want to add another complete chip to be able to monitor it.)

	So if you start some [[operating system]] which enables the KW11-L (e.g. [[UNIX]]), and then try and re-boot it ~~using a front console 'Restart' switch, or~~ by halting the machine and using the 'Go' command to [[ODT]], you'll probably get a clock [[interrupt]] in the process of booting, which will trash it.		So if you start some [[operating system]] which enables the KW11-L (e.g. [[UNIX]]), and then try and re-boot it by halting the machine and using the 'Go' command to [[ODT]], you'll probably get a clock [[interrupt]] in the process of booting, which will trash it.

	The ''only'' thing that clears it is a manual disable (write 0 to the KW11-L's CSR), using the BDV11's on-board RESTART switch, or power cycling the machine.		The ''only'' thing that clears it is either a manual disable (write 0 to the KW11-L's CSR); something which toggles the BDCOK bus line - e.g. using the BDV11's on-board RESTART switch, or a front-panel restart switch; or power cycling the machine.

	''Caveat haquur!''		''Caveat haquur!''