[GreenKeys] just bagged a heath TU off eplace good to go with H89 in disp...

Mon Nov 5 15:24:14 EST 2012

Oh, quite nice. That one is compatible with the FPJ11 floating point
unit. Which if you can get makes floating point operations -- hello C
and FORTRAN ... and COBOL -- move pretty damn quick. Which is nice.

Saying having an FPU is "nice" is a massive understatement by the way.
Especially when the CPU operates at 'only' 15MHz.

Cheers,
Christian

On 5 November 2012 14:27, Adrian Stoness <tdk.knight at gmail.com> wrote:
> your joking? what i have had a dual wide all this time and thought it would
> not work interesting...
> got the m8192 YB
>
> On Mon, Nov 5, 2012 at 1:21 PM, Christian Gauger-Cosgrove
> <captainkirk359 at gmail.com> wrote:
>>
>> Umm no...
>>
>> The M8192 version of the 11/73 -- that is the *DUAL WIDE* version --
>> will work in an 18-bit backplane, if I remember correctly. It's the
>> M8190 -- the *QUAD WIDE* version -- that absolutely requires the C/D
>> interconnect for PMI memory.
>>
>> Of course, the M8190 is also the module number of the 11/83 and 11/93.
>> So some M8190s are more expensive then others. It's all dependent on
>> the appended letters to the M8190 module.
>>
>>
>> You really need to look at either the DEC Edited Option Module List or
>> one of the handy PDP-11 Field Guide files to see what the suffixed
>> letters mean. Since there's quite a price difference between a board
>> that is incapable of getting an FPU and one with an FPU and CIS
>> options.
>>
>>
>> Of course, there's also the memory modules one needs to know about. A
>> quad-wide PMI memory will *NOT* work in an 18-bit serpentine
>> backplane. A quad-wide or dual-wide QBUS memory will however -- if it
>> supports 18b addressing. (Some of the small memories are only 16b
>> addressing capable.)
>>
>>
>> The BA23 box -- which I think looks a bit ugly, I like the BA123 box
>> more, or the BA11 style box -- has a few Q22/CD slots at the top of
>> the backplane, and the rest is all Q22/Q22 serpentine. You'd put the
>> PMI memories *BEFORE* the CPU, and then the devices on the QBUS after
>> the CPU.
>>
>>
>>
>> More important information about the PDP-11's peripherals -- always,
>> always *ALWAYS* put an RQDX1 or RQDX2 controller as the very last
>> device on the bus; since they break the grant continuity chain. The
>> RQDX3 and RQDX4 are fine though.
>>
>> A good controller to acquire is an MSCP SCSI controller like the
>> CQD-220; because you can still "easily" acquire fifty-pin SCSI disks,
>> which are nice and small, and "reliable enough". Plus te SCSI disks
>> are nice and bit, and you could put things like BSD or RSX, or RSTS on
>> them.
>>
>>
>>
>> Any way, I'm rambling.
>> Cheers!
>>
>>
>>
>>
>> On 5 November 2012 13:20, Adrian Stoness <tdk.knight at gmail.com> wrote:
>> > u need a ba23 backplane for the 11/73
>> > h11 is not a ba23
>> >
>> > On Mon, Nov 5, 2012 at 12:15 PM, Christian Gauger-Cosgrove
>> > <captainkirk359 at gmail.com> wrote:
>> >>
>> >> Ah, will the 11/73 work in the H-11?
>> >>
>> >> The answer is "Maybe." It depends on whether the H11 does anything
>> >> "funky" with the -- at the time of the LSI-11/03 -- unused bus lines
>> >> that the 11/23 and 11/73 (and later 22-bit '11 CPUs) used for the
>> >> higher order address bits.
>> >>
>> >> It shouldn't since the H11 uses the actual straight from DEC LSI-11 CPU
>> >> board.
>> >>
>> >>
>> >> You will probably also want to invest in an MSV11-L RAM; or if you
>> >> feel very bored, wirewrap the backplane to 22-bit and invest in a 512K
>> >> or 1MB RAM board.
>> >>
>> >>
>> >> Otherwise, it should be fine.
>> >>
>> >>
>> >> Cheers,
>> >> Christian
>> >>
>> >> On 5 November 2012 13:04,  <COURYHOUSE at aol.com> wrote:
>> >> > I will have to make a list  ...    due to it's prior owner I would
>> >> > suspect
>> >> > it is as loaded as can be.  I have the floppy drives but the   disks
>> >> > are
>> >> > roached ... I need to  find  some live media or a way to load and
>> >> > save
>> >> > some....tell me more....... oddly enough I wonder if the  ACE  video
>> >> > editor
>> >> > carcus  that has an  11/73  board in it would fly in this  H-11
>> >> > unit!?
>> >> >
>> >> >
>> >> > In a message dated 11/5/2012 8:48:43 A.M. Alaskan Standard Time,
>> >> > captainkirk359 at gmail.com writes:
>> >> >
>> >> > Hello Ed:
>> >> >
>> >> > What kind of boards are in the H11 by any chance?
>> >> >
>> >> >
>> >> > And have you considered trying to get the H11 up and running RT-11 by
>> >> > any chance? (All you need is a PC with a serial port and a second
>> >> > serial port on the H11. And patience. BUT NEVERMIND THAT!)
>> >> >
>> >> >
>> >> > Also, you considered trying to upgrade the H11's CPU from the
>> >> > godawful
>> >> > LSI-11 to a PDP-11/23 CPU instead?
>> >> >
>> >> >
>> >> > Cheers,
>> >> > Christian
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>
>