[Simh] PDP-8 FPP register name descriptions

[Johnny Billquist]

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 <raywjewhurst at gmail.com
> <mailto:raywjewhurst at gmail.com>> 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" <simh at rickmurphy.net
>     <mailto:simh at rickmurphy.net>> 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
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>
>
>
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-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol