[Simh] PDP-8 FPP register name descriptions
Johnny Billquist
bqt at softjar.se
Sat Apr 9 12:47:50 EDT 2016
On 2016-04-09 17:51, Ray Jewhurst wrote:
> Actually, the FPP is not in the manual. So that is why I tried the
> documentation on Bitsavers and needed help to fill in the gaps.
Which manual?
Johnny
>
> Thanks
> Ray
>
> On Apr 9, 2016 10:58 AM, "Johnny Billquist" <bqt at softjar.se
> <mailto:bqt at softjar.se>> wrote:
>
> On 2016-04-09 13:32, Ray Jewhurst wrote:
>
> Those registers are in the pdp8_fpp.c file. As for the other ones, I
> already utilized them.
>
>
> But then you do not need documentation on the FPP8A, so the question
> at the start was misleading. We're now talking about the
> implementation in SIMH... The registers of the FPP8A are all
> documented in the Users Manual.
>
> Johnny
>
>
> Thanks
> Ray
>
> On Apr 9, 2016 5:08 AM, "Johnny Billquist" <bqt at softjar.se
> <mailto:bqt at softjar.se>
> <mailto:bqt at softjar.se <mailto:bqt at softjar.se>>> 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
> <raywjewhurst at gmail.com <mailto:raywjewhurst at gmail.com>
> <mailto:raywjewhurst at gmail.com <mailto:raywjewhurst at gmail.com>>
> <mailto:raywjewhurst at gmail.com
> <mailto:raywjewhurst at gmail.com> <mailto: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>
> <mailto:simh at rickmurphy.net <mailto:simh at rickmurphy.net>>
> <mailto:simh at rickmurphy.net
> <mailto:simh at rickmurphy.net> <mailto: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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> --
> Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
> email: bqt at softjar.se <mailto:bqt at softjar.se>
> <mailto:bqt at softjar.se <mailto:bqt at softjar.se>> ||
>
> Reading murder books
> pdp is alive! || tryin' to stay hip" -
> B. Idol
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>
> --
> Johnny Billquist || "I'm on a bus
> || on a psychedelic trip
> email: bqt at softjar.se <mailto:bqt at softjar.se> ||
> Reading murder books
> pdp is alive! || tryin' to stay hip" - B. Idol
>
--
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
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