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The PiDP-8/I software distribution is an agglomeration of software from

* **Warren Young ** Did everything listed in `ChangeLog.md` that is not attributed to anyone else. * **Tony Hill ** Merged all the upstream SIMH changes between late September 2015 and late December 2016 into the PiDP-8/I simulator. * **Rick Murphy ** optimized the `pep001.pal` * example so that it fits into a single page of PDP-8 core, and provided several useful files in his OS/8 disk images that have managed to land in this software distribution's OS/8 disk image. (The program buildsĪn d in stalls `pidp8i -t est`.) He also provided a one-line fix tha t completes the work of Henk Gooijen's step counter patch. Bernard ** wrote `src/test.c` and the c ore of what now appears as `README-test.md`. * **H en k Gooijen ** Pushed the PDP-8 simu lator's internal EAE step counter value down into the PiDP-8/I's LED man ipulation co de, wit hou t which the step counter LEDs remain dark even whe n using the EAE. * ** Ian Schof ield ** Modified th e LED lamp drivingĬode in the simulat or to better simulate the incan descent lamps in the original PDP-8/I hardware. Also wrote the version of the SysV init script that came with that release as `rc.pidp8`, shipped here Thomas** Creator of the insta llation scri pts for theĢ015.12.15 release, which were folded into the `make install` handler within `Makefile.in`. * **Dylan McNamee** Creator of the "buildroot" feature used in the creation of the offi cial 20 15.12.15 release versions.
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* ** Mik e Ba rnes** Porte d Oscar Vermeulen's SimH 3.9 based PiDP-8/I s imulator to the new Sim H 4.0 code base.
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* **Robert M Supnik** Primary author of the S imH PDP-8 simulator upon Host and major contributor to the PiDP-8/I support forum on Author of the bulk of the documentation Curator of the default set of binary demo media Necessary to make it use the PiDP-8/I front panel hardware Author of the modifications to the S imH PDP-8 simulator Creator of the project (both hardware and software) # Creators and Major Contributors to the PiDP-8/I Project Handler just to get a separate checkin comment.)Ĭheck-in: 9a12773270 user: tangent tags: trunkĬlarity pass on the top-level README.md file.Ĭheck-in: e2fd19eea1 user: tangent tags: trunk (I could have checked this in separately, but the twoįixes are in overlapping and interrelated sections of code, so itĭoesn't make sense to check in a purposely-written erroneous SING INST It is supposed to stop the processor just as if you'd pressed STOP. When flipped with the processor in free-running mode, Operation of the switches, I found that we weren't handling SING_INST While in there and reading the DEC documentation describing the proper Rather than continue to the instruction after the HLT, skipping it. Instruction, pressing CONT would basically jump 2 instructions forward, With the prior scheme, while the processor was stopped with a HLT More or less the same way as all the others, in a single cycle of

Instruction execution over two separate passes of the PDP-8 sim'sĬPU instruction decoding loop. Two switches had a kind of lock-step operation that tried to split These are related because in the old way of doing things, these Fixed a couple of problems in the way SING INST and CONT were handled.
