Difference between revisions of "PDP-1-X"
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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: | ||
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* 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== | ||
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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] | ||
Latest revision as of 17:55, 7 April 2025
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 CPU (to support time-sharing): 'TS Off', 'TS Debug', 'Exec' (used for the kernel), and 'User';
- additional instructions;
- the addition of an index register;
- an I/O bus for connection of peripherals.
See also
External links
- RLE PDP-1 - Original RLE PDP-1 documents
- Machine readable copies of paper tapes and DECtapes from MIT:
