Nobody needs any of this stuff. I'm 50 and have had a great
sysadmin/developer job for 20 years, and have $26 to burn, that's pretty
much it. ;)
--
bkw
On 6/29/20 9:43 PM, Stephen Adolph wrote:
Perfectly suitable hack, yes.
I would need to build it to debug it so it needs a ram on my end.
To be honest I have been struggling with why 4MB is needed. A
reasonable utility could easily push and pull files from LaddieAlpha as
a remote drive.
To be CP/M, you must have the local block oriented disk but 2MB should
be sufficient.
Anyhow, onwards.
On Monday, June 29, 2020, Brian K. White <[email protected]
<mailto:[email protected]>> wrote:
$56 for a single
https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/CY62177EV30LL-55ZXI/428-3278-ND/2188331
<https://www.digikey.com/product-detail/en/cypress-semiconductor-corp/CY62177EV30LL-55ZXI/428-3278-ND/2188331>
This looks compatible for $26 for a single
https://www.digikey.com/product-detail/en/renesas-electronics-america/RMLV3216AGSA-5S2-AA0/RMLV3216AGSA-5S2-AA0-ND/9650085
<https://www.digikey.com/product-detail/en/renesas-electronics-america/RMLV3216AGSA-5S2-AA0/RMLV3216AGSA-5S2-AA0-ND/9650085>
$32 at Mouser
https://www.mouser.com/Semiconductors/Memory-ICs/SRAM/_/N-4bzpt?P=1z0w8ge
<https://www.mouser.com/Semiconductors/Memory-ICs/SRAM/_/N-4bzpt?P=1z0w8ge>
It even seems to have a lower standby current. The Cypress data
sheet says 3uA and the Renesas says 0.6uA
If I buy one of these myself and solder it, will that be enough
other than re-programming?
$26 is a lot, and I wouldn't expect you to buy 100 of them for $2400
but, if I want it, and assuming a perfect solder job, is there
anything else besides a reflash required to make it work?
Obviously, it's a given that all concept of warranty and liability
goes out the window instantly.
--
bkw
On 6/29/20 7:38 PM, Stephen Adolph wrote:
Well, I have built and tested everything but I am sad to report
that I am the victim of counterfeit components.
All the 4MB SRAMs that I bought are actually 2MB SRAMs!
I've complained to the seller, and we'll see what they say about
their "certified" parts.
4 MB SRAMs are hard to find at a reasonable price. I ordered the
same product twice from the same seller. The first time I paid
2x what I paid the second time. I guess that's the hint right
there.
What does this mean? It means that everyone on this build that
wanted 4MB (basically everyone) will have to settle for 2MB.
Also, If I can't find 4MB parts for a reasonable cost, I may not
be able to offer that version again.
For the curious, here is what Digikey wants for the parts I spec'd
https://www.digikey.ca/en/products/detail/cypress-semiconductor-corp/CY62177EV30LL-55ZXIT/2184405
<https://www.digikey.ca/en/products/detail/cypress-semiconductor-corp/CY62177EV30LL-55ZXIT/2184405>
Steve
On Mon, Jun 29, 2020 at 11:19 AM r cs <[email protected]
<mailto:[email protected]> <mailto:[email protected]
<mailto:[email protected]>>> wrote:
Thank you kindly! I'm enjoying daydreaming about using
them -- so
enjoy summer first!
I appreciate your efforts, and I hope you and yours are well.
Take care!
rcs
On Mon, Jun 29, 2020 at 8:04 AM Stephen Adolph
<[email protected] <mailto:[email protected]>
<mailto:[email protected]
<mailto:[email protected]>>> wrote:
For those who have reached out to order REXCPM-
I'm sorry that they are not done yet! But the good
news is that
all the hardware is now built - 25 units.
Next steps are to program them, debug/test, then
package and ship.
Thanks for your patience; it is summer time here and
there are
lots of time demands ;).
cheers
Steve
-- /Níl aon tinteán mar do thinteán féin. /[Irish Gaelic]
(There is no fireside like your own fireside.)
--
bkw
--
bkw
