Without digging two deeply into it, at least some of them are just slight name variants.
FPAC0-4 == FAC (Floating Accumulator) - it has varying sizes depending on the mode CMD == Command XRA == XO (Index) - it's called "idx reg pointer" in the comment Tom On Sat, Apr 9, 2016 at 7:32 AM, Ray Jewhurst <[email protected]> wrote: > Those registers are in the pdp8_fpp.c file. As for the other ones, I > already utilized them. > > Thanks > Ray > On Apr 9, 2016 5:08 AM, "Johnny Billquist" <[email protected]> wrote: > >> Where do you find those registers? I'm looking at the FPP8A Users Manual, >> and cannot find them. >> In that manual you have all the FPP8A registers listed in table 2-1. >> >> Johnny >> >> On 2016-04-09 04:19, Ray Jewhurst wrote: >> >>> Hello, >>> >>> The register I don't know are FPAC0-4, CMD, XRA, SSF and FLAG. To be >>> honest with you, I know very little about FFP's. The most I really know >>> about floating point operations is the difference between a float and a >>> double! lol. I am more of an end user and administrator than I am a >>> coder. I am glad though that everyone is so helpful and patient with me. >>> >>> Thanks >>> Ray >>> >>> On Fri, Apr 8, 2016 at 9:04 PM, Ray Jewhurst <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> I already used EK-FFP8A-MM-001 and the Handbook and could figure out >>> about half the registers. I'm not by my code right now but I will >>> send a message listing the ones I couldn't figure out later tonight. >>> While I was thinking of amending the documentation to include the >>> FFP8A. >>> >>> Thanks >>> Ray >>> >>> On Apr 8, 2016 7:15 PM, "Rick Murphy" <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> At 04:15 PM 4/8/2016, Ray Jewhurst wrote: >>> >>> Hello, >>> >>> I'm trying to expand the help files on some of simulators >>> and noticed that I can't find much information for the PDP-8 >>> FPP. I have current documentation but there are no >>> references to the FPP at all. If anyone can point me in >>> the right direction, I'd really appreciate. I'm also >>> checking to see if I can get any relevant information from >>> Bitsavers. >>> >>> >>> The most comprehensive documentation is the Maintenance Manual: >>> >>> http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/pdp8/pdp8a/EK-FPP8A-MM-001_FPP8-A_Maint_Sep76.pdf >>> >>> Chapter 2 has the register info. >>> >>> Also, FPP-12 documentation, for example >>> http://bitsavers.trailing-edge.com/pdf/dec/pdp12/fpp12/ >>> The FPP-8A and FPP-12 are register compatible. The FPP-8 has a >>> few tweaks but it's generally quite compatible. >>> >>> If you want any review of whatever documentation you end up >>> writing, I'll be happy to help (I did a bunch of work on the >>> SIMH FPP-8A simulation to get it working and make it compatible >>> with the real FPP.) >>> -Rick >>> _______________________________________________ >>> Simh mailing list >>> [email protected] <mailto:[email protected]> >>> http://mailman.trailing-edge.com/mailman/listinfo/simh >>> >>> >>> >>> >>> _______________________________________________ >>> Simh mailing list >>> [email protected] >>> http://mailman.trailing-edge.com/mailman/listinfo/simh >>> >>> >> -- >> Johnny Billquist || "I'm on a bus >> || on a psychedelic trip >> email: [email protected] || Reading murder books >> pdp is alive! || tryin' to stay hip" - B. Idol >> _______________________________________________ >> Simh mailing list >> [email protected] >> http://mailman.trailing-edge.com/mailman/listinfo/simh > > > _______________________________________________ > Simh mailing list > [email protected] > http://mailman.trailing-edge.com/mailman/listinfo/simh >
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