[N8VEM: 18280] Intersil (RCA) 1802 on ECB?

[G. Beat]

I am aware that Lee Hart and Herb Johnson have the Membership Card implementation of the RCA 1802 (COSMAC),
that uses 3 stacked PC boards, the size of an Altoids mint container.

Lee had an earlier design, a BASYS card design, that is not that much smaller than current Eurocard ECB form factor.
Has anyone suggested having an 1802 with memory / appropriate interfaces on the ECB ?

greg

[Paul Anderson]

Aren't the 1802's pretty hard to get these days?

Sent from my iPhone

Post by G. Beat
I am aware that Lee Hart and Herb Johnson have the Membership Card implementation of the RCA 1802 (COSMAC),
that uses 3 stacked PC boards, the size of an Altoids mint container.
Lee had an earlier design, a BASYS card design, that is not that much smaller than current Eurocard ECB form factor.
Has anyone suggested having an 1802 with memory / appropriate interfaces on the ECB ?
greg
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[G. Beat]

Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.

The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s, with its heavy radiation field.

Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi

RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802

[Andrew Bingham]

I've seen it mentioned a couple of times.

I think you could make an ECB SBC and then the question would be drivers to
interact with the other 8-bit ECB cards.

Andrew

Post by G. Beat
Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.
The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s,
with its heavy radiation field.
Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi
RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802

[Borut]

Hi guys!

I think a board that could support multiple CPUs would be quite interesting.
I have a SC/MP chip laying around somewhere and would be also interested in
a
TMS9995 computer.
Most of this kind of simple computer boards with 8 bit CPUs have a lot in
common, what differs is just
how CPU is connected and how control signals are generated.

What i have in mind is a board with ECB drivers, RAM, ROM, oscillator,
maybe some basic
serial I/O support (Max232) and a big enough prototyping area to support
2-3 40pin DIP ICs
and a couple of narrow 16-24 pin DIPs for specific control logic. All
necessary address, data and control
signals are lined up at the beginning of the prototyping area.
The 40pin DIP space (for CPU) could even gave two holes connected together
to make it easier to wire the connections.

Best regards,

Bo/

Post by Andrew Bingham
I've seen it mentioned a couple of times.
I think you could make an ECB SBC and then the question would be drivers
to interact with the other 8-bit ECB cards.
Andrew

Post by G. Beat
Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.
The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s,
with its heavy radiation field.
Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi
RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802

[Andrew Bingham]

I'd really like to do a IM6120/HD6120 (CMOS PDP-8) board, but the 12-bit
bus would mean that other than accessing 8-bit I/O devices, everything
would need to be on the SBC board.

Post by Borut
Hi guys!
I think a board that could support multiple CPUs would be quite interesting.
I have a SC/MP chip laying around somewhere and would be also interested
in a
TMS9995 computer.
Most of this kind of simple computer boards with 8 bit CPUs have a lot in
common, what differs is just
how CPU is connected and how control signals are generated.
What i have in mind is a board with ECB drivers, RAM, ROM, oscillator,
maybe some basic
serial I/O support (Max232) and a big enough prototyping area to support
2-3 40pin DIP ICs
and a couple of narrow 16-24 pin DIPs for specific control logic. All
necessary address, data and control
signals are lined up at the beginning of the prototyping area.
The 40pin DIP space (for CPU) could even gave two holes connected together
to make it easier to wire the connections.
Best regards,
Bo/

Post by Andrew Bingham
I've seen it mentioned a couple of times.
I think you could make an ECB SBC and then the question would be drivers
to interact with the other 8-bit ECB cards.
Andrew

Post by G. Beat
Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.
The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used
in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s,
with its heavy radiation field.
Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi
RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802

[G. Beat]

The IM6120/HD6120 was a featured project of Spare Time Gizmos, a few years ago.
http://www.sparetimegizmos.com/Hardware/SBC6120-2.htm

The custom SBC6120 front panel (aka DEC style) was nice.
http://www.sparetimegizmos.com/Hardware/SBC6120_Front_Panel.htm

They have the schematic, Gerber, and JEDEC for the 3 GALs used, and HEX for the EPROMs.
http://www.sparetimegizmos.com/Hardware/SBC6120_Builders.htm

[Andrew Bingham]

I have an SBC-6120 kit that I bought secondhand (but not the really nice
front panel). STG doesn't offer the kits anymore..... I wish I could get
the front panel.

One issue with the Gerbers there is they are original Gerber format and not
the newer RS-274X Extended Gerber that we use now. So I had trouble
getting them to come up in moder viewers.

I agree that it would be best to build a board that was compatible with the
nice ROM Panel/Monitor code that is on those pages, which is GPL licensed.

Post by G. Beat
The IM6120/HD6120 was a featured project of Spare Time Gizmos, a few years ago.
http://www.sparetimegizmos.com/Hardware/SBC6120-2.htm
The custom SBC6120 front panel (aka DEC style) was nice.
http://www.sparetimegizmos.com/Hardware/SBC6120_Front_Panel.htm
They have the schematic, Gerber, and JEDEC for the 3 GALs used, and HEX for the EPROMs.
http://www.sparetimegizmos.com/Hardware/SBC6120_Builders.htm

[Nikolay Dimitrov]

Guys, just one off-topic question:

Do you know whether on the SBC-6120 front panel the DATA blinkenlights
are blinking only on bus data transfers, or also on instruction fetches?
How they're blinking?

Regards,
Nikolay

[G. Beat]

Andrew -

Since this was first offered about 7 years ago, I have discovered that 30 additional kits were assembled and sold,
through the KickStarter funding mechanism (30 backers pledging $19,412, minimum pledge $599) in 2013.
https://www.kickstarter.com/projects/sparetimegizmos/classic-pdp8-replica

greg

[Andrew Bingham]

I know, I missed out on that, every time he has done a run since 2010 it
has been the "last run" but from reading the STG forums it seems like this
last time for real.

Post by G. Beat
Andrew -
Since this was first offered about 7 years ago, I have discovered that 30
additional kits were assembled and sold,
through the KickStarter funding mechanism (30 backers pledging $19,412,
minimum pledge $599) in 2013.
https://www.kickstarter.com/projects/sparetimegizmos/classic-pdp8-replica
greg

[Ian May]

Hi all,
RCA CDP1802AE processors are US$5.97 at the acpsurplus eBay store at the
moment
http://www.ebay.com/itm/390303914933?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
. These are chips that will run on 10 Volts (no "C" in the part number),
and according to the data sheet with a 10 Volt core voltage and a 5 Volt
I/O voltage a 4 MHz clock can be used up to 85 degrees C. With a 10 Volt
core and I/O voltage (not easy to do since you probably have to interface
to 5 Volt RAM and ROM) 6.4 MHz is possible to 85 degrees (and 8 MHz at 25
degrees!).

Some Chinese eBay sellers have CDP1806ACE chips for sale which will do 5
MHz at 5 Volts but the ones that I have received have been re-marked to
make them appear as new - YMMV. You would need to be very brave if you were
to try buying a CDP1802AE from a Chinese seller. You would most likely
receive a re-marked CDP1802ACE that will fail very quickly if given more
than 5 Volts. (I have received chips marked as HD6309s that were actually
HD6309Es - the external clock generator version - the "E" distinction was
clearly not understood by the person who did the re-marking).

Making an ECB 1802 board will have the problem that it will be difficult to
use the fancy I/O systems, EF lines and DMA for instance, when you have to
present Z80 like signals to the bus, but it shouldn't be too difficult to
do. It is on my "something to think about" list for later in the year.
Cheers,
Ian.

Post by G. Beat
Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.
The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s,
with its heavy radiation field.
Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi
RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802
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[Edward Snider]

Thanks for the link Ian. I grabbed a few for a the little cosmac elf clone
(membership card) I'm building and future projects.
Pretty interesting microprocessor.

Ed

Post by Ian May
Hi all,
RCA CDP1802AE processors are US$5.97 at the acpsurplus eBay store at the
moment
http://www.ebay.com/itm/390303914933?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
. These are chips that will run on 10 Volts (no "C" in the part number),
and according to the data sheet with a 10 Volt core voltage and a 5 Volt
I/O voltage a 4 MHz clock can be used up to 85 degrees C. With a 10 Volt
core and I/O voltage (not easy to do since you probably have to interface
to 5 Volt RAM and ROM) 6.4 MHz is possible to 85 degrees (and 8 MHz at 25
degrees!).
Some Chinese eBay sellers have CDP1806ACE chips for sale which will do 5
MHz at 5 Volts but the ones that I have received have been re-marked to
make them appear as new - YMMV. You would need to be very brave if you were
to try buying a CDP1802AE from a Chinese seller. You would most likely
receive a re-marked CDP1802ACE that will fail very quickly if given more
than 5 Volts. (I have received chips marked as HD6309s that were actually
HD6309Es - the external clock generator version - the "E" distinction was
clearly not understood by the person who did the re-marking).
Making an ECB 1802 board will have the problem that it will be difficult
to use the fancy I/O systems, EF lines and DMA for instance, when you have
to present Z80 like signals to the bus, but it shouldn't be too difficult
to do. It is on my "something to think about" list for later in the year.
Cheers,
Ian.

Post by G. Beat
Intersil manufactures the CDP1802A today.
http://www.intersil.com/en/products/space-and-harsh-environment/harsh-environment/microprocessors-and-peripherals/CDP1802A.html
They market for low power and harsh environments.
The Sandia Labs Silicon on Sapphire (SoS) versions of the 1802 were used in 1980s designs
of some space craft, notability Galileo as it orbited Jupiter in 1990s,
with its heavy radiation field.
Alltronics, in Santa Clara, has an ample supply of the CDP1802ACE
$4.95 for qty. 1 or $2.50 each for qty. 26+
http://www.alltronics.com/cgi-bin/category.cgi
RCA 1802 COSMAC (Wikipedia)
https://wikipedia.org/wiki/RCA_1802
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