PDP-1-X - Revision history

Jnc: /* External links */ +Index Register and Micro-program Instruction Class

2025-04-07T15:55:55Z

External links: +Index Register and Micro-program Instruction Class

← Older revision		Revision as of 15:55, 7 April 2025
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	** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]		** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]
	** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp38_newInstrs_jun66.pdf Modes, Registers, New Instructions, and Traps and Interrupts in the PDP-1-X]		** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp38_newInstrs_jun66.pdf Modes, Registers, New Instructions, and Traps and Interrupts in the PDP-1-X]
			** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp35_idxReg_jun68.pdf Index Register and Micro-program Instruction Class] - referred to in the above
	* Machine readable copies of paper tapes and DECtapes from MIT:		* Machine readable copies of paper tapes and DECtapes from MIT:
	** [http://bitsavers.org/bits/MIT/rle_pdp1x/ MIT RLE PDP1X]		** [http://bitsavers.org/bits/MIT/rle_pdp1x/ MIT RLE PDP1X]

Jnc: /* See also */ +PDP-1-X microtape format

2025-04-07T14:31:01Z

Larsbrinkhoff: /* External links */ Add links to paper tapes and DECtapes.

2023-10-20T09:25:05Z

External links: Add links to paper tapes and DECtapes.

← Older revision		Revision as of 09:25, 20 October 2023
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	** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]		** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]
	** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp38_newInstrs_jun66.pdf Modes, Registers, New Instructions, and Traps and Interrupts in the PDP-1-X]		** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp38_newInstrs_jun66.pdf Modes, Registers, New Instructions, and Traps and Interrupts in the PDP-1-X]
			* Machine readable copies of paper tapes and DECtapes from MIT:
			** [http://bitsavers.org/bits/MIT/rle_pdp1x/ MIT RLE PDP1X]
			** [http://bitsavers.org/bits/DEC/pdp1/papertapeImages/ DEC PDP1 paper tape images]

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

	[[Category: DEC Systems]]		[[Category: DEC Systems]]

Jnc: A brief summary

2021-08-19T15:44:40Z

A brief summary

New page

The '''PDP-1-X''' was a heavily modified [[PDP-1]] created at [[MIT]]'s [[RLE]].

Notable differences are:

* the addition of operating modes to the [[Central Processing Unit|CPU]] (to support [[time-sharing]]): 'TS Off', 'TS Debug', 'Exec' (used for the [[kernel]]), and 'User';
* additional [[instruction]]s;
* the addition of an [[index register]];
* an [[input/output|I/O]] [[bus]] for connection of [[peripheral]]s.

==External links==

* [http://www.bitsavers.org/pdf/mit/rle_pdp1/ RLE PDP-1] - Original RLE PDP-1 documents
** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/MIT_PDP-1_Memos.txt PDP-1 Timesharing System Memos]
** [http://www.bitsavers.org/pdf/mit/rle_pdp1/memos/pdp38_newInstrs_jun66.pdf Modes, Registers, New Instructions, and Traps and Interrupts in the PDP-1-X]

{{semi-stub}}

[[Category: DEC Systems]]

← Older revision		Revision as of 14:31, 7 April 2025
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	The '''PDP-1-X''' was a heavily modified [[PDP-1]] created at [[MIT]]'s [[RLE]].		The '''PDP-1-X''' was a heavily modified [[PDP-1]] created at [[Massachusetts Institute of Technology\|MIT]]'s [[Research Laboratory of Electronics\|RLE]].

	Notable differences are:		Notable differences are:
Line 7:		Line 7:
	* the addition of an [[index register]];		* the addition of an [[index register]];
	* an [[input/output\|I/O]] [[bus]] for connection of [[peripheral]]s.		* an [[input/output\|I/O]] [[bus]] for connection of [[peripheral]]s.

			==See also==

			* [[PDP-1-X Time Sharing System]]
			* [[PDP-1-X microtape format]]

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