[Simh] PDP-8 FPP register name descriptions
Ray Jewhurst
raywjewhurst at gmail.com
Sat Apr 9 13:04:17 EDT 2016
The simh PDP-8 manual is what I was speaking of/ I did read every piece of
info off Bitsavers I could find so I think it will be fairly complete.
Thanks
Ray
On Sat, Apr 9, 2016 at 12:47 PM, Johnny Billquist <bqt at softjar.se> wrote:
> 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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