2 Nov
2003
2 Nov
'03
3:35 a.m.
Hi all,
I've just come back from the hamfest with yet more junk. Besides the large
quantity of LEDs, LCD displays and magazines, I picked up a set of PCBs. Two
of them are marked 'IHR "CSG" 1B' - these are fitted with four TIL311s
each,
as well as loads of 74LS logic ICs, circa 1981. There's also an IDC connector
and some form of power connector.
Next up is a 10-key keyboard - complete with 74C922 keyboard controller IC.
This one bears the text 'keyboard (0-9) JRT'. A nice addition to my junk
box :)
Finally, I've got two boards with Fairchild (?) "96LS488DC 8128 USA" ICs
fitted. One of them consists solely of a pair of IDC connectors, a power
conector, a PAL12H6C (Monolithic Memories - there's a name I haven't heard
for a while), an 8-way dipswitch and a pair of 74LS chips. This board is
marked "IHR GPIB ADAPTER / MRC INSTITUTE OF HEARING RESEARCH".
The last board has the same Fairchild chip (ceramic with brass cover) as
the other board, but with four IDC connectors, loads of 74LS logic chips,
three power connectors and a 5-way DIP switch. The board is marked "MRC IHR
Controller / (C) MRC 1982".
Can someone tell me what the 96LS488DC is? From what I can tell, it's a
GPIB controller, whatever GPIB is. I'm still after a datasheet - nothing on
Google besides a Chipdir listing.
Sorry if this is off-topic - these boards seem to have come out of a
computer of some form and I would like to know if any listmembers have heard
of or seen anything similar. As far as the ten-year-rule goes, I think I'm
well within the cutoff limit - these boards all carry dates of 1983 or
earlier.
Later.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62),
http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext
... Batteries not included.
2 Nov
2 Nov
3:46 a.m.
On Sun, 2 Nov 2003, Philip Pemberton wrote:
Can someone tell me what the 96LS488DC is? From what
I can tell, it's a
GPIB controller, whatever GPIB is. I'm still after a datasheet - nothing on
Google besides a Chipdir listing.
GPIB is the General Purpose Interface Bus. If
memory serves me right,
this is the same as HP's IEEE488 (HPIB) bus, which was meant to be a
simple bus useable to connect HP's test/measure equipment together
to controlling computers, for example. I believe the GPIB was a
somewhat more generalized description, but essentially the same
bus.
--fred (back to work on his barely on-topic VAX 3100-85 of 1993)
4:12 a.m.
Phillip,
GPIB is the "HP" general purpose interface bus, I use it here with some
of
the same cards in a 486DX rack mount computer to control some of my test
equipment. To get more specific info on it do a Google search for
National
Instruments, and HPIB and it should bring up lots of makers of equipment
for
those as well. I control several "PTS" RF generators and an HP-8640B and
a
TEK 2712 Spectrum analyzer. They are great for control and the bus
doesn't
make as much RF hash as running a high speed pentium computer over a
network
does. Shout if you need pin outs and further descriptions.
Jim
WB2FCN
http://eshop1.chem.buffalo.edu
Philip Pemberton wrote:
Hi all,
I've just come back from the hamfest with yet more junk. Besides the large
quantity of LEDs, LCD displays and magazines, I picked up a set of PCBs. Two
of them are marked 'IHR "CSG" 1B' - these are fitted with four TIL311s
each,
as well as loads of 74LS logic ICs, circa 1981. There's also an IDC connector
and some form of power connector.
Next up is a 10-key keyboard - complete with 74C922 keyboard controller IC.
This one bears the text 'keyboard (0-9) JRT'. A nice addition to my junk
box :)
Finally, I've got two boards with Fairchild (?) "96LS488DC 8128 USA"
ICs
fitted. One of them consists solely of a pair of IDC connectors, a power
conector, a PAL12H6C (Monolithic Memories - there's a name I haven't heard
for a while), an 8-way dipswitch and a pair of 74LS chips. This board is
marked "IHR GPIB ADAPTER / MRC INSTITUTE OF HEARING RESEARCH".
The last board has the same Fairchild chip (ceramic with brass cover) as
the other board, but with four IDC connectors, loads of 74LS logic chips,
three power connectors and a 5-way DIP switch. The board is marked "MRC IHR
Controller / (C) MRC 1982".
Can someone tell me what the 96LS488DC is? From what I can tell, it's a
GPIB controller, whatever GPIB is. I'm still after a datasheet - nothing on
Google besides a Chipdir listing.
Sorry if this is off-topic - these boards seem to have come out of a
computer of some form and I would like to know if any listmembers have heard
of or seen anything similar. As far as the ten-year-rule goes, I think I'm
well within the cutoff limit - these boards all carry dates of 1983 or
earlier.
Later.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62),
http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext
... Batteries not included.
5:22 a.m.
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9 a.m.
In message <m1AGL01-000J1UC@p850ug1>
ard(a)p850ug1.demon.co.uk (Tony Duell) wrote:
I didn't think it was a controller, I thought it
was the state machines
(and a little more) for the talker and listener handshake for GPIB.
I'd still
be interested in a datasheet. I'm in a strange mood today - maybe I
could implement a GPIB controller in an FPGA :)
GPIB is essentially the same as HPIB or IEEE-488
(hence the number on the
chip :-)).
I've heard of IEE488 - I might have a look at the specs later - it
might be
possible to implement a simple GPIB controller in an 8052 or a PIC
(surprisingly enough, PICs are on topic - they were developed in the late 70s
by General Instrument).
I think your cards are from peripherals,
not the control computer.
Not that that's a major problem. Now all I need is
the IEE488/GPIB/HPIB spec
and a datasheet for the 96LS488.
Thanks.
--
Phil. | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem(a)dsl.pipex.com | ViewFinder, Ethernet (Acorn AEH62),
http://www.philpem.dsl.pipex.com/ | 8xCD, framegrabber, Teletext
Never underestimate the power of human stupidity -- Robert A. Heinlein
10:34 a.m.
"Philip Pemberton" <philpem(a)dsl.pipex.com>
I've heard of IEE488 - I might have a look at the
specs later - it might
be possible to implement a simple GPIB controller in an 8052 or a PIC
Some years back I built a serial adapter for use with HPIB (IEEE 488)
plotters such as the 9872. It was based on a 1 MHz Rockwell R6511Q
microprocessor, which is a 6502 derivative. I implemented the IEEE 488
protocol entirely in software. It wasn't too difficult.
12:19 p.m.
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7518
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participants (5)
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ard＠p850ug1.demon.co.uk -
chejmw＠acsu.buffalo.edu -
eric＠brouhaha.com -
philpem＠dsl.pipex.com -
waltje＠pdp11.nl