27 Dec
2001
27 Dec
'01
12:36 a.m.
On Dec 26, 18:21, Ethan Dicks wrote:
It's a commercial 4-layer board. The legend says "Tellima Technology Ltd
(C) 1995", "PC03753". It has a couple of surface-mount KM68100 SRAMs, but
the most prominent features are the two Actel 1020 FPGAs. It also has 6 x
8837 and 3 x 8838 interface ICs, a pair of 74HCT244's, 2 x 74HCT160 and a
74HCT161, a MAX695, a 16MHz oscillator, a 3V 1/2AA lithium cell, a littl
daughterboard with some inteface chips, and the 26-way header for the PC
interface.
The PC interface is a small 4-layer ISA card "PC03285-C", with a couple of
Actel 1010's, a few small SMDs, 2 x 74HCT160 and a 74HCT161, and a 26-pin
header on the backplate. Interestingly, it also has space for a 132-pin
SMD device, several smaller SMDs, eight ZIP devices, and a couple of 8-pin
miniDINs.
I don't have a scanner, at least not one that works. Nor a digital camera,
except my Indycams, which aren't exactly high resolution. I'll see what I
can do...
--
Pete Peter Turnbull
Network Manager
University of York
--- Pete Turnbull <pete(a)dunnington.u-net.com>
wrote:
> > It's not cool like core, but did anyone
ever come up with a modern
> > battery-backed-up SRAM board?
>
> Yes, I've got one. It even has a connector to link to an interface in
a
PC, so you can
squirt (or suck) data in (or out) directly.
That's a cool feature. You got docs? Is this commercial or homebrew?
How about a digital picture? 75dpi scan? 
27 Dec
27 Dec
5:14 a.m.
--- Pete Turnbull <pete(a)dunnington.u-net.com> wrote:
On Dec 26, 18:21, Ethan Dicks wrote:
I had no idea people were making OMNIBUS boards in 1995. That's amazing.
There are still machines in commercial use, but most of them are so deep
inside something else that nobody knows how to upgrade them, let alone
_want_ to change out the old for the new.
I see they are a British company (http://www.tellima.co.uk) I guess that
means that their products will be a wee bit less common on this side of
the pond.
-ethan
It has a couple of surface-mount KM68100 SRAMs,
--- Pete Turnbull
<pete(a)dunnington.u-net.com> wrote:
> > It's not cool like core, but did
anyone ever come up with a modern
> > battery-backed-up SRAM board?
>
> Yes, I've got one...
It's a commercial 4-layer board. The legend says "Tellima Technology Ltd
(C) 1995", "PC03753"... but
the most prominent features are the two Actel 1020 FPGAs. It also has 6
x
8837 and 3 x 8838 interface ICs, a pair of 74HCT244's, 2 x 74HCT160 and a
74HCT161, a MAX695, a 16MHz oscillator, a 3V 1/2AA lithium cell, a littl
daughterboard with some inteface chips, and the 26-way header for the PC
interface.
The PC interface is a small 4-layer ISA card "PC03285-C", with a couple
of
Actel 1010's, a few small SMDs, 2 x 74HCT160 and a 74HCT161, and a 26-pin
header on the backplate. Interestingly, it also has space for a 132-pin
SMD device, several smaller SMDs, eight ZIP devices, and a couple of
8-pin
miniDINs.
I don't have a scanner, at least not one that works. Nor a digital
camera,
except my Indycams, which aren't exactly high resolution. I'll see what
I
can do...
--
Pete Peter Turnbull
Network Manager
University of York
__________________________________________________
Do You Yahoo!?
Send your FREE holiday greetings online!
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5:42 a.m.
The boards were made specially for a pharmaceutical company in England.
They were using several PDP8E in a Kent processes control system. They
began to experience problems with the core memory cards, and had these
produced specially to extend the life of the system.
Some more information is on http://www.ps8computing.co.uk/PDP8/ram_board.htm
Kevin Murrell
-----Original Message-----
From: owner-classiccmp(a)classiccmp.org
[mailto:owner-classiccmp@classiccmp.org]On Behalf Of Ethan Dicks
Sent: 27 December 2001 16:15
To: classiccmp(a)classiccmp.org
Subject: Re: PDP8/A memory problems, what to do?
--- Pete Turnbull <pete(a)dunnington.u-net.com> wrote:
On Dec 26, 18:21, Ethan Dicks wrote:
I had no idea people were making OMNIBUS boards in 1995. That's amazing.
There are still machines in commercial use, but most of them are so deep
inside something else that nobody knows how to upgrade them, let alone
_want_ to change out the old for the new.
I see they are a British company (http://www.tellima.co.uk) I guess that
means that their products will be a wee bit less common on this side of
the pond.
-ethan
It has a couple of surface-mount KM68100 SRAMs,
--- Pete Turnbull
<pete(a)dunnington.u-net.com> wrote:
> > It's not cool like core, but did
anyone ever come up with a modern
> > battery-backed-up SRAM board?
>
> Yes, I've got one...
It's a commercial 4-layer board. The legend says "Tellima Technology Ltd
(C) 1995", "PC03753"... but
the most prominent features are the two Actel 1020 FPGAs. It also has 6
x
8837 and 3 x 8838 interface ICs, a pair of 74HCT244's, 2 x 74HCT160 and a
74HCT161, a MAX695, a 16MHz oscillator, a 3V 1/2AA lithium cell, a littl
daughterboard with some inteface chips, and the 26-way header for the PC
interface.
The PC interface is a small 4-layer ISA card "PC03285-C", with a couple
of
Actel 1010's, a few small SMDs, 2 x 74HCT160 and a 74HCT161, and a 26-pin
header on the backplate. Interestingly, it also has space for a 132-pin
SMD device, several smaller SMDs, eight ZIP devices, and a couple of
8-pin
miniDINs.
I don't have a scanner, at least not one that works. Nor a digital
camera,
except my Indycams, which aren't exactly high resolution. I'll see what
I
can do...
--
Pete Peter Turnbull
Network Manager
University of York
__________________________________________________
Do You Yahoo!?
Send your FREE holiday greetings online!
http://greetings.yahoo.com
6:43 a.m.
--- Kevin Murrell <kevin(a)xpuppy.freeserve.co.uk> wrote:
The boards were made specially for a pharmaceutical
company in England.
They were using several PDP8E in a Kent processes control system. They
began to experience problems with the core memory cards, and had these
produced specially to extend the life of the system.
That makes sense. *Somebody* paid a lot of money for them. It's
gratifying to see Linux drivers for the PC side.
Some more information is on
http://www.ps8computing.co.uk/PDP8/ram_board.htm
Kevin Murrell
Nice page! I haven't seen this guy's stuff before. Makes me want to
go out and start fixing my pair of Straight-8s (need *much* cleaning
first - they used to run a typesetter at a newspaper).
I wasn't envisioning a card _that_ fancy, but it'll do. I'd be happy
with a simple, simple RAM card.
-ethan
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