I've order 6 ICs straight away.
Hitachi HM6117LP-4 6117 2K x 8 CMOS Static RAM

These look to be direct replacements.

Rick

On Sun, Mar 15, 2020 at 12:00 PM volt-nuts-request@lists.febo.com wrote:

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips,
is there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

Hi Rick,
I would recommend the MiniPro TL866CS USB Universal Programmer, about $65. I
been using an earlier version for years. The software is ok and very
complete for device selection. I use it the burn/re-burn/update various
implementations of PROMs. You may also want to get a UV EPROM eraser for
some of the earlier stuff. Search on eBay for Ultraviolet UV EPROM eraser
and it's a blue box with timer for $16. Instruments like the HP 3456A, 3458A
all have EPROMs you have to erase before re-programming or use new blank
ones.

Regards,
Don

-----Original Message-----
From: volt-nuts volt-nuts-bounces@lists.febo.com On Behalf Of Rick Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips, is
there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

backwards.

backwards.

backwards.

volt-nuts mailing list -- volt-nuts@lists.febo.com To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

Hi Rick;
I have not experimented yet but recently purchase a 10 watt UV flashlight on either eBay or Amazon for something like 20USD.
I thought is would be useful for EPROM's as well as a number of other applications such as epoxy curing.
So I have not tested this yet but my assumption is a 10 watt LED is a lot stronger then most UV sources using older technology aside from high powered HID lamps.
On a related topic, I wonder if some of these raw 100 watt+ UV LED modules would be effective at killing COVID19. I have seen movies where actors stand surrounded in UV light when leaving a bio-hazard lab but have no idea if this has real scientific merit.
Cheers;

Tom Knox

"Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of Don@True-Cal truecalservices@gmail.com
Sent: Thursday, March 26, 2020 12:58 PM
To: 'Discussion of precise voltage measurement' volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

Hi Rick,
I would recommend the MiniPro TL866CS USB Universal Programmer, about $65. I
been using an earlier version for years. The software is ok and very
complete for device selection. I use it the burn/re-burn/update various
implementations of PROMs. You may also want to get a UV EPROM eraser for
some of the earlier stuff. Search on eBay for Ultraviolet UV EPROM eraser
and it's a blue box with timer for $16. Instruments like the HP 3456A, 3458A
all have EPROMs you have to erase before re-programming or use new blank
ones.

Regards,
Don

-----Original Message-----
From: volt-nuts volt-nuts-bounces@lists.febo.com On Behalf Of Rick Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips, is
there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

backwards.

backwards.

backwards.

volt-nuts mailing list -- volt-nuts@lists.febo.com To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

Actually think this is not standard UV (UV-A) which cheaper emitters generate.
UV-C are a very specific part and I have been trying for years to get one for "nuking" FPGAs and EPROMs.
Last I checked if you could get one they range from £9 to £44 for multiple mW source @ Mouser.
30 day lead time alas and MOQ .

Incidentally I did find that the emitter sold with X-brand orange UV glue is fairly powerful compared to my nail lamp: set the glue in seconds and nail polish in minutes comparable wity the entire lamp but from a single emitter.
I've since mounted it in a proper ally reflective casing with low melting point alloy and Epoxy to increase efficiency and add extra cooling as the diode became warm even at minimal current.

-A

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of Tom Knox actast@hotmail.com
Sent: 26 March 2020 20:01
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Solartron 7081

Hi Rick;
I have not experimented yet but recently purchase a 10 watt UV flashlight on either eBay or Amazon for something like 20USD.
I thought is would be useful for EPROM's as well as a number of other applications such as epoxy curing.
So I have not tested this yet but my assumption is a 10 watt LED is a lot stronger then most UV sources using older technology aside from high powered HID lamps.
On a related topic, I wonder if some of these raw 100 watt+ UV LED modules would be effective at killing COVID19. I have seen movies where actors stand surrounded in UV light when leaving a bio-hazard lab but have no idea if this has real scientific merit.
Cheers;

Tom Knox

"Peace is not the absence of violence, but the presence of Justice" Both MLK and Albert Einstein

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of Don@True-Cal truecalservices@gmail.com
Sent: Thursday, March 26, 2020 12:58 PM
To: 'Discussion of precise voltage measurement' volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

Hi Rick,
I would recommend the MiniPro TL866CS USB Universal Programmer, about $65. I
been using an earlier version for years. The software is ok and very
complete for device selection. I use it the burn/re-burn/update various
implementations of PROMs. You may also want to get a UV EPROM eraser for
some of the earlier stuff. Search on eBay for Ultraviolet UV EPROM eraser
and it's a blue box with timer for $16. Instruments like the HP 3456A, 3458A
all have EPROMs you have to erase before re-programming or use new blank
ones.

Regards,
Don

-----Original Message-----
From: volt-nuts volt-nuts-bounces@lists.febo.com On Behalf Of Rick Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips, is
there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

backwards.

backwards.

backwards.

volt-nuts mailing list -- volt-nuts@lists.febo.com To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

Rick,

Where are you located?

I have a couple 7081's and the ability to read, archive, and program most
any EPROM you need, assuming I have the EPROM.

I have opened a 7081 to see how many and what specifically the EPROM's are.

Happy to help if I can.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of Rick
Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips,
is there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

hangs

hangs

MWHPR22MB01426F76421B8001E6791B0ADAFB0@MWHPR22MB0142.namprd22.prod.outlook.c
om

hangs

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

I also have UV EPROM erasers.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of J. L.
Trantham
Sent: Thursday, March 26, 2020 6:50 PM
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081

Rick,

Where are you located?

I have a couple 7081's and the ability to read, archive, and program most
any EPROM you need, assuming I have the EPROM.

I have opened a 7081 to see how many and what specifically the EPROM's are.

Happy to help if I can.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of Rick
Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips,
is there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

hangs

hangs

MWHPR22MB01426F76421B8001E6791B0ADAFB0@MWHPR22MB0142.namprd22.prod.outlook.c
om

hangs

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

Maybe contact your local health authority to see if they can make use of them?
One big problem is that these are in short supply.

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of J. L. Trantham jltran@att.net
Sent: 27 March 2020 00:25
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081

I also have UV EPROM erasers.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of J. L.
Trantham
Sent: Thursday, March 26, 2020 6:50 PM
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081

Rick,

Where are you located?

I have a couple 7081's and the ability to read, archive, and program most
any EPROM you need, assuming I have the EPROM.

I have opened a 7081 to see how many and what specifically the EPROM's are.

Happy to help if I can.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of Rick
Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips,
is there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

hangs

hangs

MWHPR22MB01426F76421B8001E6791B0ADAFB0@MWHPR22MB0142.namprd22.prod.outlook.c
om

hangs

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
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volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

It can accommodate only about 6-8 EPROMs at a time and it takes about an
hour to erase them.  Not really designed for 'high volume'.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of Andre
Sent: Friday, March 27, 2020 5:24 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Solartron 7081

Maybe contact your local health authority to see if they can make use of
them?
One big problem is that these are in short supply.

From: volt-nuts volt-nuts-bounces@lists.febo.com on behalf of J. L.
Trantham jltran@att.net
Sent: 27 March 2020 00:25
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081

I also have UV EPROM erasers.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of J. L.
Trantham
Sent: Thursday, March 26, 2020 6:50 PM
To: 'Discussion of precise voltage measurement'
Subject: Re: [volt-nuts] Solartron 7081

Rick,

Where are you located?

I have a couple 7081's and the ability to read, archive, and program most
any EPROM you need, assuming I have the EPROM.

I have opened a 7081 to see how many and what specifically the EPROM's are.

Happy to help if I can.

Joe

-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces@lists.febo.com] On Behalf Of Rick
Bale
Sent: Thursday, March 26, 2020 12:42 PM
To: volt-nuts@lists.febo.com
Subject: Re: [volt-nuts] Solartron 7081

I installed all the 7081's static ram chips and of course no joy. It
wouldn't be a worth while repair if it was hard! I double checked the +5v
and +12v power rails again and that's still looking good.  All LEDs just
stay on with no display like it's hanging up very early in the boot up
sequence.

Seems like the next step is to replace the eproms chips.  I believe I can
find these online, but I will have to program them.  Where do I start?  I
need to invest in a reader/writer.  We live in a Windows 10 world.  I can
run it in DOS if I had to or even in a earlier version of windows in a
virtual session.  I'd really like to read the old chips as well and compare
it to what I'm seeing with saved images that are available from xdevs, etc.

Does anyone have a recommendation for an economical way to enter the eprom
world?  I've seen reader/writers that are over $1000 and ones for $39 and
everything in between.  Besides confirming it can read the TMS2564 chips,
is there specific criteria or features I should be looking for in the
reader/writer?

Thanks all, Rick

On Mon, Mar 16, 2020 at 6:45 AM Rick Bale rpbale@bellsouth.net wrote:

hangs

hangs

MWHPR22MB01426F76421B8001E6791B0ADAFB0@MWHPR22MB0142.namprd22.prod.outlook.c
om

hangs

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com
and follow the instructions there.

volt-nuts mailing list -- volt-nuts@lists.febo.com
To unsubscribe, go to
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and follow the instructions there.

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To unsubscribe, go to
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