13 Mar
2017
13 Mar
'17
12:23 a.m.
I'm almost out of Atmel 29C256 flash roms. I use these primarily for P112
boot roms. I'd like some more because I still have P112 boards to sell...
and I want them for other projects. Mouser, Digikey, and Jameco don't
have it anymore. What are you guys doing to get these and equivalent
chips?
--
David Griffith
dave at 661.org
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13 Mar
13 Mar
7:06 a.m.
On Mon, 13 Mar 2017, David Griffith via cctalk wrote:
I'm almost out of Atmel 29C256 flash roms. I use these primarily for P112
boot roms. I'd like some more because I still have P112 boards to sell...
and I want them for other projects. Mouser, Digikey, and Jameco don't have
it anymore. What are you guys doing to get these and equivalent chips?
These are 28C256, but may work?
http://www.unicornelectronics.com/IC/FLASH.html
g.
--
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9:39 a.m.
On 03/13/2017 02:23 AM, David Griffith via cctalk wrote:
I'm almost out of Atmel 29C256 flash roms. I use these
primarily for P112 boot roms. I'd like some more because
I still have P112 boards to sell... and I want them for
other projects. Mouser, Digikey, and Jameco don't have it
anymore. What are you guys doing to get these and
equivalent chips?
I have some 27C256, don't know if those are compatible.
Alltronics in San Jose (or thereabouts) used to have a
massive stock of older chips.
Jon
9:55 a.m.
Didn't mention what package?
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Jon Elson via cctalk
<cctalk at classiccmp.org>
Sent: Monday, March 13, 2017 9:39:54 AM
To: David Griffith; General at classiccmp.org; Discussion@
Subject: Re: sourcing Atmel 29Cxxx series flash roms
On 03/13/2017 02:23 AM, David Griffith via cctalk wrote:
I'm almost out of Atmel 29C256 flash roms. I use these
primarily for P112 boot roms. I'd like some more because
I still have P112 boards to sell... and I want them for
other projects. Mouser, Digikey, and Jameco don't have it
anymore. What are you guys doing to get these and
equivalent chips?
I have some 27C256, don't know if those are compatible.
Alltronics in San Jose (or thereabouts) used to have a
massive stock of older chips.
Jon
10:02 a.m.
On 3/13/17 12:39 PM, Jon Elson via cctalk wrote:
On 03/13/2017 02:23 AM, David Griffith via cctalk
wrote:
FYI:
27Cxxx is an EPprom
28Cxxx is an EEprom
29Cxxx is a flash prom
Then can be pin compatible in SOME system but they program very differently.
IT the system expects to be able to rewrite some locatons then you need
EEPROM.
If the system expects to be able to rewrite blocks then it s flash.
If you put a Eprom in you can do none of those things without a UVlamp
and an external programmer(most cases).
The P112 can use all or any save for being in system writable if needed.
Allison
I'm almost out of Atmel 29C256 flash roms. I use these primarily for
P112 boot roms. I'd like some more because I still have P112 boards
to sell... and I want them for other projects. Mouser, Digikey, and
Jameco don't have it anymore. What are you guys doing to get these
and equivalent chips?
I have some 27C256, don't know if those are compatible. Alltronics in
San Jose (or thereabouts) used to have a massive stock of older chips.
Jon
14 Mar
14 Mar
9:25 a.m.
What about the package? Is it a DIP or one of the other three
possible packages.
DIPs are going out of style.
Dwight
________________________________
From: cctalk <cctalk-bounces at classiccmp.org> on behalf of allison via cctalk
<cctalk at classiccmp.org>
Sent: Monday, March 13, 2017 10:02:05 AM
To: Jon Elson; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: sourcing Atmel 29Cxxx series flash roms
On 3/13/17 12:39 PM, Jon Elson via cctalk wrote:
On 03/13/2017 02:23 AM, David Griffith via cctalk
wrote:
FYI:
27Cxxx is an EPprom
28Cxxx is an EEprom
29Cxxx is a flash prom
Then can be pin compatible in SOME system but they program very differently.
IT the system expects to be able to rewrite some locatons then you need
EEPROM.
If the system expects to be able to rewrite blocks then it s flash.
If you put a Eprom in you can do none of those things without a UVlamp
and an external programmer(most cases).
The P112 can use all or any save for being in system writable if needed.
Allison
I'm almost out of Atmel 29C256 flash roms. I use these primarily for
P112 boot roms. I'd like some more because I still have P112 boards
to sell... and I want them for other projects. Mouser, Digikey, and
Jameco don't have it anymore. What are you guys doing to get these
and equivalent chips?
I have some 27C256, don't know if those are compatible. Alltronics in
San Jose (or thereabouts) used to have a massive stock of older chips.
Jon
13 Mar
13 Mar
10:18 a.m.
On Mon, Mar 13, 2017 at 12:23 AM, David Griffith via cctalk
<cctalk at classiccmp.org> wrote:
I'm almost out of Atmel 29C256 flash roms. I use these primarily for P112
boot roms. I'd like some more because I still have P112 boards to sell...
and I want them for other projects. Mouser, Digikey, and Jameco don't have
it anymore. What are you guys doing to get these and equivalent chips?
Looks like you have updated the P112 parts list to the Atmel
AT28C256-15PU which Mouser currently has in stock, so problem solved?
https://661.org/p112/parts.html
http://www.mouser.com/ProductDetail/Atmel/AT28C256-15PU
2840
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2841
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6 comments
6 participants
participants (6)
-
ajp166＠verizon.net -
dave＠661.org -
dkelvey＠hotmail.com -
elson＠pico-systems.com -
geneb＠deltasoft.com -
glen.slick＠gmail.com