Programmed IO - Revision history

Tingo: added Glossary category

2014-07-23T21:45:39Z

added Glossary category

← Older revision		Revision as of 21:45, 23 July 2014
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	== References ==		== References ==
	*{{ND-doc\|06.015.02}}		*{{ND-doc\|06.015.02}}
			[[Category:Glossary]]

TArntsen: Minor plural fix

2012-07-17T09:33:13Z

Minor plural fix

← Older revision		Revision as of 09:33, 17 July 2012
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	== IO memory map ==		== IO memory map ==

	Most Norsk Data devices ~~resides~~ in the area addressable from IOX. The lower half of that IO area is reserved for Norsk Data devices. The rest of that area is free for customer devices.		Most Norsk Data devices reside in the area addressable from IOX. The lower half of that IO area is reserved for Norsk Data devices. The rest of that area is free for customer devices.

	IO device address map for ND-100 (octal)		IO device address map for ND-100 (octal)

TArntsen: Minor typos corrected

2009-10-02T14:48:01Z

Minor typos corrected

← Older revision		Revision as of 14:48, 2 October 2009
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	'''Programmed IO''' is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].		'''Programmed IO''' is used for the CPU to communicate with devices. The only instructions that could access the IO are [[IOX]] and [[IOXT]].
	IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions ~~transfers~~ data to and from register A.		IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfer data to and from register A.

	== IO transfer direction ==		== IO transfer direction ==
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	== IO memory map ==		== IO memory map ==

	Most Norsk Data devices ~~recides~~ in the area ~~adressable~~ from IOX. The lower half of that IO area is reserved for Norsk Data devices. The rest of that area is free for customer devices.		Most Norsk Data devices resides in the area addressable from IOX. The lower half of that IO area is reserved for Norsk Data devices. The rest of that area is free for customer devices.

	IO device address map for ND-100 (octal)		IO device address map for ND-100 (octal)
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	140000-177777 Norsk Data interfaces		140000-177777 Norsk Data interfaces

	System registers : Some system control registers are controlled via the IO bus, for example ECCR, Error ~~Correctio~~ Control Register is located on the memory module so the ~~micro code~~ converts the TRR instruction to an IOXT 100115		System registers : Some system control registers are controlled via the IO bus, for example ECCR, Error Correction Control Register is located on the memory module so the microcode converts the TRR instruction to an IOXT 100115

	== ND IO interrupts ==		== ND IO interrupts ==

	If the IO address is to a non existing device the IO instruction will ~~timeout~~ after 10 us and issue an [[IOX error]] interrupt if enabled.		If the IO address is to a non-existing device the IO instruction will time out after 10 us and issue an [[IOX error]] interrupt if enabled.

	== ND IO register standard ==		== ND IO register standard ==
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	== ND IO device numbers ==		== ND IO device numbers ==

	The device numbers are listed in ~~the~~ appendix C of ND-100 functional description.		The device numbers are listed in appendix C of ND-100 functional description.

	== References ==		== References ==
	*{{ND-doc\|06.015.02}}		*{{ND-doc\|06.015.02}}

Mike: Change the way references where displayed

2009-01-18T00:00:39Z

Change the way references where displayed

← Older revision		Revision as of 00:00, 18 January 2009
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	~~:''The following information is collected from the {{ND-doc\|06.015}}''~~

	'''Programmed IO''' is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].		'''Programmed IO''' is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].
	IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfers data to and from register A.		IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfers data to and from register A.
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	== References ==		== References ==
			*{{ND-doc\|06.015.02}}
	* ~~[http://bitsavers.org/pdf/norskData/ND-100-FD-~~ND-06.015.~~02_ND-100_Functional_Description_1985.pdf ND-06-015-~~02 ~~ND-100 Functional Description (1985)]~~

Mike: /* ND IO register standard */ +"Missing" template

2008-11-13T13:02:17Z

ND IO register standard: +"Missing" template

← Older revision		Revision as of 13:02, 13 November 2008
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	== ND IO register standard ==		== ND IO register standard ==
			{{Missing}}
	~~(to be done)~~

	== ND IO device numbers ==		== ND IO device numbers ==

Mike: Wikifying the intro

2008-11-05T13:20:01Z

Wikifying the intro

← Older revision		Revision as of 13:20, 5 November 2008
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	The following information is collected from the ND-~~100 Functional Description~~.		:''The following information is collected from the {{ND-doc\|06.015}}''

	Programmed IO is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].		'''Programmed IO''' is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].
	IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfers data to and from register A.		IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfers data to and from register A.

Gandalf: Initial page, copy from Rogers wiki

2008-10-21T00:04:56Z

Initial page, copy from Rogers wiki

New page

The following information is collected from the ND-100 Functional Description.

Programmed IO is used for the CPU to communicate with devices. The only instructions that could access the IO is [[IOX]] and [[IOXT]].
IOX uses the lower 11 bits in the instruction as address (0-3777 oct). IOXT uses the T register as address and could access the full IO address range (0-177777 oct). Both instructions transfers data to and from register A.

== IO transfer direction ==

The lowest bit in the address decides the transfer direction. If the bit is zero then the direction is from the IO register into register A. If the bit is one then the contents in register A is written to the IO register.

== IO memory map ==

Most Norsk Data devices recides in the area adressable from IOX. The lower half of that IO area is reserved for Norsk Data devices. The rest of that area is free for customer devices.

IO device address map for ND-100 (octal)
000000-001777 Norsk Data interfaces
002000-003777 Free for customer interfaces
004000-077777 Illegal
100000-100777 System control registers
101000-107777 Reserved
110000-137777
140000-177777 Norsk Data interfaces

System registers : Some system control registers are controlled via the IO bus, for example ECCR, Error Correctio Control Register is located on the memory module so the micro code converts the TRR instruction to an IOXT 100115

== ND IO interrupts ==

If the IO address is to a non existing device the IO instruction will timeout after 10 us and issue an [[IOX error]] interrupt if enabled.

== ND IO register standard ==

(to be done)

== ND IO device numbers ==

The device numbers are listed in the appendix C of ND-100 functional description.

== References ==

* [http://bitsavers.org/pdf/norskData/ND-100-FD-ND-06.015.02_ND-100_Functional_Description_1985.pdf ND-06-015-02 ND-100 Functional Description (1985)]