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Cleaned up management of unused PSW bits

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Jeff Parsons 2016-12-04 16:23:37 -08:00 • committed by Jeff Parsons
commit 1e1db7b78e
24 changed files with 574 additions and 530 deletions
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13
pubs/dec/pdp11/1120/README.md
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@ -7,4 +7,15 @@ permalink: /pubs/dec/pdp11/1120/
DEC PDP-11/20 Publications
---
* PDP-11/20 Handbook (1971) [[PDF](http://bitsavers.trailing-edge.com/pdf/dec/pdp11/handbooks/PDP1120_Handbook_1972.pdf)]
- PDP-11/20 Handbook (1969) [[PDF](http://research.microsoft.com/en-us/um/people/gbell/Digital/PDP%2011%20Handbook%201969.pdf)]
- PDP-11/20 Handbook (1971) [[PDF](http://bitsavers.trailing-edge.com/pdf/dec/pdp11/handbooks/PDP1120_Handbook_1972.pdf)]
The above publications actually apply to several PDP-11 models:
- PDP-11/10, which provided a minimum of 128 words of read/write memory (and 1024 words of read-only memory)
- PDP-11/20, which provided a minimum of 4,096 words of read-write memory
The 1971 Handbook also covers some additional models, which DEC says were "functionally identical":
- PDP-11/15 OEM Computer
- PDP-11R20 Rugged Computer