QBUS ROMs - Revision history

Jnc: Some LSI-11 instructions have issues with ROM

2023-07-05T10:58:22Z

Some LSI-11 instructions have issues with ROM

← Older revision		Revision as of 10:58, 5 July 2023
Line 17:		Line 17:

	<!-- In all of the cards, the entire ROM contents were not directly visible on the QBUS, but through a window, unlike later, larger [[QBUS]] ROM cards. -->		<!-- In all of the cards, the entire ROM contents were not directly visible on the QBUS, but through a window, unlike later, larger [[QBUS]] ROM cards. -->
			==Use restrictions==

			Note that in the [[LSI-11 chip set\|LSI-11]] [[microprocessor]], several [[instruction]]s use a [[QBUS#Signalling\|DATIO bus cycle]] to fetch source [[operand]]s from [[main memory]]:

			* MTPS
			* MUL
			* DIV
			* ASH
			* ASHC

			Use of these instructions with an ''operand'' in ROM, in ROM code which is to run on any of these processors, is thus not possible. This is, of course, easily avoided by loading the operand into a [[register]] first.

	{{semi-stub}}		{{semi-stub}}

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

Jnc: Jnc moved page QBUS boot ROMs to QBUS ROMs: Now covers all QBUS ROMs

2023-07-04T13:11:55Z

Jnc moved page QBUS boot ROMs to QBUS ROMs: Now covers all QBUS ROMs

← Older revision		Revision as of 13:11, 4 July 2023
(No difference)

Jnc: + early ROM cards

2023-07-04T13:10:42Z

+ early ROM cards

← Older revision		Revision as of 13:10, 4 July 2023
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	[[Digital Equipment Corporation\|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory\|ROM]] ~~boot~~''' cards. ~~Early~~ ones also included QBUS [[terminator]]s; some of the later were multi-function cards, and included other functionality.		[[Digital Equipment Corporation\|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory\|ROM]]''' cards, initially specialized to a [[bootstrap]]ping use. Those early ones also included QBUS [[terminator]]s; some of the later were multi-function cards, and included other functionality.

	* The first was the [[REV11 DMA Refresh/Bootstrap/Terminator]] [[DEC card form factor‎\|dual]] card. <!-- ; it contains 128 words, using 2 [[PROM]] chips. -->		* The first was the [[REV11 DMA Refresh/Bootstrap/Terminator]] [[DEC card form factor‎\|dual]] card. <!-- ; it contains 128 words, using 2 [[PROM]] chips. -->
	* The second was the [[BDV11 Bus Terminator/ROM‎]], a [[DEC card form factor‎\|quad]] card.		* The second was the [[BDV11 Bus Terminator/ROM‎]], a [[DEC card form factor‎\|quad]] card.

			A number of ROM memory cards were also available:

			* [[MRV11-A Read-Only Memory Module]] (also known as the 'MRV11)
			* [[MRV11-B UV PROM-RAM Memory Module]]
	* [[MRV11-C Read-Only Memory Module]]		* [[MRV11-C Read-Only Memory Module]]
	* [[MRV11-D Universal Programmable Read-Only Memory]]		* [[MRV11-D Universal Programmable Read-Only Memory]]

Jnc: Add some more

2023-07-02T16:05:56Z

Add some more

← Older revision		Revision as of 16:05, 2 July 2023
Line 1:		Line 1:
	[[Digital Equipment Corporation\|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory\|ROM]] boot''' cards; ~~most~~ of ~~them~~ were multi-function cards, and included other functionality.		[[Digital Equipment Corporation\|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory\|ROM]] boot''' cards. Early ones also included QBUS [[terminator]]s; some of the later were multi-function cards, and included other functionality.

	<!-- * The ~~first~~ was the [[]] [[DEC card form factor‎\|~~dual~~]] card -->		* The first was the [[REV11 DMA Refresh/Bootstrap/Terminator]] [[DEC card form factor‎\|dual]] card. <!-- ; it contains 128 words, using 2 [[PROM]] chips. -->
			* The second was the [[BDV11 Bus Terminator/ROM‎]], a [[DEC card form factor‎\|quad]] card.
			* [[MRV11-C Read-Only Memory Module]]
			* [[MRV11-D Universal Programmable Read-Only Memory]]

	* ~~The second was the~~ [[~~BDV11 Bus Terminator/ROM‎~~]]~~, a~~ [[~~DEC card form factor‎\|quad]] card. <!-~~- ~~; it contains 128 words, using 2 [[PROM~~]] ~~chips. -->~~		Multi-function cards which included ROMs included:

			* [[MXV11-A Multifunction Option Module]]
			* [[MXV11-B Multifunction Option Module]]

	<!-- In all of the cards, the entire ROM contents were not directly visible on the QBUS, but through a window, unlike later, larger [[QBUS]] ROM cards. -->		<!-- In all of the cards, the entire ROM contents were not directly visible on the QBUS, but through a window, unlike later, larger [[QBUS]] ROM cards. -->

	{{stub}}		{{semi-stub}}

	~~{{PDP-11~~}}

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

Jnc: +cat

2018-12-18T15:04:37Z

+cat

← Older revision		Revision as of 15:04, 18 December 2018
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	{{PDP-11}}		{{PDP-11}}

			[[Category: QBUS ROMs]]

Jnc: Very stubby, but a start

2017-11-23T14:21:05Z

Very stubby, but a start

New page

[[Digital Equipment Corporation|DEC]] produced several generations of '''[[QBUS]] [[Read-only memory|ROM]] boot''' cards; most of them were multi-function cards, and included other functionality.



* The second was the [[BDV11 Bus Terminator/ROM‎]], a [[DEC card form factor‎|quad]] card. 



{{stub}}

{{PDP-11}}