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Updated the last blog post

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Jeff Parsons 2016-11-20 15:42:16 -08:00 • committed by Jeff Parsons
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_posts/2016-11-13-curious-pdp-11-features.md
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@ -5,12 +5,12 @@ date: 2016-11-13 13:00:00
permalink: /blog/2016/11/13/ permalink: /blog/2016/11/13/
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Last week, I ran PDPjs through a series of early DEC [PDP-11 Paper Tape Diagnostics](/apps/pdp11/tapes/diags/). Last week, I ran PDPjs through a series of early [PDP-11 Paper Tape Diagnostics](/apps/pdp11/tapes/diags/).
These tests were originally released in 1970 and are documented in such DEC publications as the These tests were originally released in 1970 and are documented in such DEC publications as the
[MAINDEC USER REFERENCE MANUAL](http://archive.pcjs.org/pubs/dec/pdp11/diags/MAINDEC_User_Reference_Manual_Oct73.pdf) [MAINDEC USER REFERENCE MANUAL](http://archive.pcjs.org/pubs/dec/pdp11/diags/MAINDEC_User_Reference_Manual_Oct73.pdf)
(October 1973). (October 1973).
[Tests 1-12](/apps/pdp11/tapes/diags/#tests-1-12), "MAINDEC-11-D0AA-PB" through "MAINDEC-11-D0LA-PB", [Tests 1-12](/apps/pdp11/tapes/diags/#tests-1-12) (MAINDEC-11-D0AA-PB through MAINDEC-11-D0LA-PB)
uncovered a couple of uninteresting bugs in the emulator that affected the ASRB and RORB instructions, both involving some uncovered a couple of uninteresting bugs in the emulator that affected the ASRB and RORB instructions, both involving some
incorrect masks. But aside from those hiccups, the tests ran fine. Ditto for [Test 13](/apps/pdp11/tapes/diags/#test-13). incorrect masks. But aside from those hiccups, the tests ran fine. Ditto for [Test 13](/apps/pdp11/tapes/diags/#test-13).
@ -73,7 +73,7 @@ instruction tests, instead of using opcodes that would become new instructions l
The most recent paper tape diagnostic I've run is the [11/70 CPU EXERCISER](/apps/pdp11/tapes/diags/#md-11-1170-cpu-exerciser), The most recent paper tape diagnostic I've run is the [11/70 CPU EXERCISER](/apps/pdp11/tapes/diags/#md-11-1170-cpu-exerciser),
and after several more bug fixes, PDPjs passes that test now, too. That's something not even and after several more bug fixes, PDPjs passes that test now, too. That's something not even
[SimH](https://github.com/simh/simh) is currently able to do. [SimH](https://github.com/simh/simh) is currently able to do (as of November 2016).
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