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]> wrote: > > $56 for a single > https://www.digikey.com/product-detail/en/cypress-semiconduc > tor-corp/CY62177EV30LL-55ZXI/428-3278-ND/2188331 > > This looks compatible for $26 for a single > https://www.digikey.com/product-detail/en/renesas-electronic > s-america/RMLV3216AGSA-5S2-AA0/RMLV3216AGSA-5S2-AA0-ND/9650085 > > $32 at Mouser > 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-semiconduc >> tor-corp/CY62177EV30LL-55ZXIT/2184405 >> >> >> Steve >> >> On Mon, Jun 29, 2020 at 11:19 AM r cs <[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]>> 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 >
