PDP-1-X: Difference between revisions
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m →See also: +PDP-1-X microtape format |
m →External links: +Index Register and Micro-program Instruction Class |
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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 15:55, 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:
