26 Jan
2005
26 Jan
'05
6:56 a.m.
Hi All,
How many types of front panel keyboard were used with the 2113 E-series CPU?
I have one in front of me that has two ribbon cables that run from the
keyboard PCB to the CPU PCB (one from the top edge of the keyboard PCB one
from the bottom edge) but I seem to remember having
seen other 2113 CPU's
where the keybaord PCB is smaller and a single cable runs
from the bottom
edge of the keyboard to the CPU PCB.
What I'm trying to do is find a 'short' front panel to replace the
'embedded' keybaord of a 5420 Signal Analyser and turn it back into an mini
E-series CPU.
I had assumed that I would be able to unbolt the top of a 2113 front panel
and use just the keyboard portion of the assembly but the PCB behind the
keyboard that I have turns out to be too tall! Is there is shorter one
available.
Can anyone shed any light on this one?
Cheers
Peter Brown
26 Jan
26 Jan
2:08 p.m.
Take a look at this doc:
http://www.bitsavers.org/pdf/hp/1000/1000_MEF_EngrRef/
92851-90001_Mar81_8.pdf
There are drawings of a shorter 2105/08/12 front panel PCA 5060-8343
and a taller 2019/11/13/17 front panel PCA 5061-1343.
Does that help at all?
On Wed, 26 Jan 2005 17:56:03 +0000, Peter Brown
<peterbrown10(a)hotmail.com> wrote:
Hi All,
How many types of front panel keyboard were used with the 2113 E-series CPU?
I have one in front of me that has two ribbon cables that run from the
keyboard PCB to the CPU PCB (one from the top edge of the keyboard PCB one
from the bottom edge) but I seem to remember having seen other 2113 CPU's
where the keybaord PCB is smaller and a single cable runs from the bottom
edge of the keyboard to the CPU PCB.
4:26 p.m.
Isn't the "tall" front panel board primarily different because it includes a
connector to go to the MPP port on the cpu? I'm not real up on that, but I
think it was only used on the F series, and used to provide high speed
memory access to an external device? Something like that sticks in my head.
Jay
----- Original Message -----
From: "Glen Slick" <glen.slick(a)gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Wednesday, January 26, 2005 7:08 PM
Subject: Re: HP 21MX E-series front panel keyboards
Take a look at this doc:
http://www.bitsavers.org/pdf/hp/1000/1000_MEF_EngrRef/
92851-90001_Mar81_8.pdf
There are drawings of a shorter 2105/08/12 front panel PCA 5060-8343
and a taller 2019/11/13/17 front panel PCA 5061-1343.
Does that help at all?
On Wed, 26 Jan 2005 17:56:03 +0000, Peter Brown
<peterbrown10(a)hotmail.com> wrote:
Hi All,
How many types of front panel keyboard were used with the 2113 E-series
CPU?
I have one in front of me that has two ribbon cables that run from the
keyboard PCB to the CPU PCB (one from the top edge of the keyboard PCB
one
from the bottom edge) but I seem to remember having seen other 2113 CPU's
where the keybaord PCB is smaller and a single cable runs from the bottom
edge of the keyboard to the CPU PCB.
29 Jan
29 Jan
3:27 a.m.
The MPP ports are used in several applications for E series CPUs as well.
----- Original Message -----
From: "Jay West" <jwest(a)classiccmp.org>
To: "Glen Slick" <glen.slick(a)gmail.com>om>; "General Discussion:
On-Topic and
Off-Topic Posts" <cctalk(a)classiccmp.org>
Sent: Wednesday, January 26, 2005 10:26 PM
Subject: Re: HP 21MX E-series front panel keyboards
Isn't the "tall" front panel board
primarily different because it includes
a connector to go to the MPP port on the cpu? I'm not real up on that, but
I think it was only used on the F series, and used to provide high speed
memory access to an external device? Something like that sticks in my
head.
Jay
----- Original Message -----
From: "Glen Slick" <glen.slick(a)gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Wednesday, January 26, 2005 7:08 PM
Subject: Re: HP 21MX E-series front panel keyboards
Take a look at this doc:
http://www.bitsavers.org/pdf/hp/1000/1000_MEF_EngrRef/
92851-90001_Mar81_8.pdf
There are drawings of a shorter 2105/08/12 front panel PCA 5060-8343
and a taller 2019/11/13/17 front panel PCA 5061-1343.
Does that help at all?
On Wed, 26 Jan 2005 17:56:03 +0000, Peter Brown
<peterbrown10(a)hotmail.com> wrote:
Hi All,
How many types of front panel keyboard were used with the 2113 E-series
CPU?
I have one in front of me that has two ribbon cables that run from the
keyboard PCB to the CPU PCB (one from the top edge of the keyboard PCB
one
from the bottom edge) but I seem to remember having seen other 2113
CPU's
where the keybaord PCB is smaller and a single cable runs from the
bottom
edge of the keyboard to the CPU PCB.
26 Jan
26 Jan
3:50 p.m.
There are two ribbon cables between the CPU board and front
panel, except when there is only one.
This actually makes a little sense.
Only one ribbon cable is needed for a standard CPU to
talk to the front panel. The extra ribbon cable connection
point on the full sized front panel may be ignored.
So HP CPU configurations add a 'booster' microcode board
to the standard CPU board. In these configurations the CPU's
MPP port (a fast I/O port for microcoded data transfers) gets
the second ribbon cable.
There are two major types of full sized front panels, those
with open leaf contacts for the buttons, and those that use
the small snap disk switches.
Electrically these are identical, mechanically the snap disk
panel is superior.
The 'short' front panel used on the smaller boxes ~might~ be
either of these boards, as its much shorter than the height of
a 2113. There may also be a smaller version for the really short
CPU box, I'm not sure about that.
Short box CPU's seem to be much less common than the
full 2113 box.
If you want to convert your 5320 CPU to a stock 2113, I have
all the chassis parts you would need to rebuild the processor in
the tall 2113 box.
----- Original Message -----
From: "Peter Brown" <peterbrown10(a)hotmail.com>
To: <cctalk(a)classiccmp.org>
Sent: Wednesday, January 26, 2005 12:56 PM
Subject: RE: HP 21MX E-series front panel keyboards
Hi All,
How many types of front panel keyboard were used with the 2113 E-series
CPU?
I have one in front of me that has two ribbon cables that run from the
keyboard PCB to the CPU PCB (one from the top edge of the keyboard PCB one
from the bottom edge) but I seem to remember having seen other 2113 CPU's
where the keybaord PCB is smaller and a single cable runs from the bottom
edge of the keyboard to the CPU PCB.
What I'm trying to do is find a 'short' front panel to replace the
'embedded' keybaord of a 5420 Signal Analyser and turn it back into an
mini E-series CPU.
I had assumed that I would be able to unbolt the top of a 2113 front panel
and use just the keyboard portion of the assembly but the PCB behind the
keyboard that I have turns out to be too tall! Is there is shorter one
available.
Can anyone shed any light on this one?
Cheers
Peter Brown
7075
days inactive
7078
days old
4 comments
4 participants
participants (4)
-
bshannon＠tiac.net -
glen.slick＠gmail.com -
jwest＠classiccmp.org -
peterbrown10＠hotmail.com