> I believe I have an 8088 compatible network client, but all my
> network cards are 16-bit etc.
Most 3Com ISA cards, such as 3C509B-TPO, will work in 8 bit slots.
Lee.
Is this online anywhere to anyone's knowledge? I assume it's in the techrefs
[1] (which I don't have, unfortunately), but I'm sure I've seen the schematic
online somewhere in the last few years.
IIRC it's only a handful of latches, buffers and address decoding - so not a
complex bit of hardware.
[1] The circuit on the MDA card is probably the same... if someone could
confirm that then I could at least trace it from a real MDA card here :)
cheers
Jules
>
>Subject: What is an HP1858-0054 transistor array?
> From: ard at p850ug1.demon.co.uk (Tony Duell)
> Date: Thu, 05 Apr 2007 18:38:14 +0100 (BST)
> To: cctalk at classiccmp.org
>
>I am working on the reset circuit of an HP9816 computer. The output side
>is rrlatively conventional, but it takes an input from a chip that I
>can't identify.
>
>The chip is a 16 pin DIL package marked with the HP house-number
>1858-0054. That's not in my equivalents list. The chip seems to have been
>made by RCA, and tracing the connections to it show that 2 of the pins
>are grounded, but none of them go to any power line. I susepct it's a
>transistor array, therefore (HP1585-xxxx numbers tend to be transistor
>arrays too).
>
>I've unsodered the chip, but trying to work out the internal arrangement
>is non-trivial, partly because there seem to be parasitic diodes, and
>secondly because I am not convinced it's just transistors brought out to
>the pins. There may be a long-tailed pair, for example. It doesn't match
>any of the arrays in my RCA databook.
>
>As I said, it's on the main processor board (the big board at the bottom)
>of an HP9816 computer. It's U115 on this board, at the front left corner,
>just behind the 16MHz clock oscillator can.
>
>Does anyone have any suggestions as to what it might be? Anyone have an
>HP9816 with this IC labelled with somethign other than an HP house number?
Search for RCA CA3080, 3081, 3082 and also look at 3046. RCA did a large
number of transistor arrays (and MOS transistor arrays).
The common layouts were 8 common transisters with emitter(grounded) base
and collectors brought to pins, 8 common collector (VCC) with emitter and
base brought to pins. Others include differential amps, darlington arrays
and some combination arrays. You have noticed there are a large number
of parasitic diodes as a side effect of forming the devices on one die.
FYI here is a sample of some of the devices:
The common collector and common emitter devices were handy for LED
segment and digit drivers but were not limited to those uses.
Ca3081, ca3082 are examples of this.
Diferential arrays like the ca3026, CA3028, ca3046, ca3049, ca3053, ca3054
were largely used for RF and analog applications but could be handy
for ECL interface to other logic.
The CA3018, ca3084 were a darlington pair and two uncommitted transistors.
CA3036 dual darlington array with all collectors common.
CA3019 and 3039 diode arrays, handy when one needs matched temperature
tracking diodes.
Just a few off the top of my head that I'd used never mind the more
appication specific Opamps and communications circuits blocks (mixers,
IF amps, Audio amps and TV chroma, sync, video processing). RCA had a
very extensive line of monolythic devices.
Allison
>
>-tony
Hello. I was wondering if you still have the DEC LG01 operators guide available? It is model: Ek-OLG01-IN-003
Thanks,
Ronnie Lane
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Hi,
>....I've run it on the IBM Sandalfoot (PowerPersonal, not exactly an
>RS/6000), ThinkPad PowerPC, and Motorola PowerStack. I think I've heard
>of it also running on the 7025-F50, but don't quote me on it.
Sounds like I'm out of luck then, my RS/6000 is a "Powerserver 7013"; AIX it
is then....
> It's a pointless exercise as there really isn't any software
>available for it.
Good point, though for what I had in mind just the stuff supplied with the
OS (NT4.0 Server) probably would have sufficed.
TTFN - Pete.
Date: Sun, 8 Apr 2007 07:12:15 -0500
From: "Dave Dunfield" <dave06a at dunfield.com>
Subject: Re: ImageDisk update
>> I was afraid of that - Getting a 5160 to network (to get the
>> images off) is a little painful - I believe I have an 8088 compatible
>> network client, but all my network cards are 16-bit etc.)
>Ok - I should have said "configured for 16-bit" - I'm sure that some of
>my network card will operate in 8-bit- I just have to figure out which
>ones, find the docs and/or configuration utility, finf the 8-bit client
>etc. etc. ... Doable - just more work than I'd like - thanks to all for
>all the card suggestions.
>Dave
---------------------
Interlink/Interserver? Laplink? PC-Anywhere/DOS?
Hardly any work at all...
m
Date: Sat, 7 Apr 2007 08:42:34 -0400 (EDT)
From: "Steven N. Hirsch" <shirsch at adelphia.net>
Subject: Re: ST506 WTB:Micropolis 1325
>I have an extensive collection of MFM/RLL drives and have _never_ run
>across one with that interface in a 3.5" form-factor. Not sure that
>anything of this sort existed. 5.25" 1/2-ht. was about as sophisticated
>as they got.
>Steve
----------------
Not a very extensive collection then ;-)
Almost everybody made 'em; Miniscribe 8425, Seagate ST125, etc. etc.
I've got a box full here.
mike
I picked up a very nice RT system the other day from a list member which
includes the 5085 graphics processor and 5081 colour display. We've just been
setting it up today (or trying to), and an obvious question arises...
The 5085 has some sort of comms input ability on a BNC connector (and output
on another BNC, but that's terminated). The RT has a little "breakout box"
which hooks up to the 5085 link card on one side and has four BNC outputs on
the other.
My *assumption* is that one of these outputs (and the breakout box came with a
coax cable already hooked up to BNC #1) links to the BNC input on the back of
the 5085, forming the comms channel between the 8085 and the RT.
However, it would be nice if someone can verify this! The RT documentation
doesn't cover the 5085 link option (so far as I've found yet, anyway). The
5085 documentation doesn't cover it either (as it only details how to hook the
5085 up to the peripherals and then boot the hardware).
Obviously I'm a little reluctant to go randomly plugging cables in,
particularly as the breakout box has four BNCs on board - although it could
well be that the RT 5085 link board was capable of driving up to four 5085
processors independently.
Google seems to know almost nothing about the 5085 option :-(
cheers
Jules
--
there's a carp in the tub
there's a carp in the tub
so nobody's taken a bath
>There are two unpopulated sockets on my two T130Bs. One is a 20-pin DIP,
>which I suspect is probably something like an LS374 and the other is the
>boot ROM. For yucks, I'd love a snapshot of the ROM and affirmation of
>what the other upopulated socket is. In return, I could verify that your
>setup's right.
The URL below links to a photograph
http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/T130B.j…
>Do you know it's a) working and b) low-level formatted to 512 bytes/sector?
A) yes B) no
>I suspect DOS might just query the fact that there's a drive there, without
any knowledge of whether it'd be capable of reading/writing data.
???
>I assume the ROM on the SCSI board is taking over control of the system
>boot - and probably has no knowledge that BASIC is actually lurking in the
>host system's ROM. If you get to the point of being able to boot DOS from a
>SCSI disk, I bet there's a way to hop into the system's on-board BASIC via
>the DOS debug program...
Well I gurss I have no choice but to get to basic through DOS. It means
lugging an extra disk but I'll do anything to get the onboard BASIC.
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