If it were me, and it's not. I would carefully replace each wire with a low to the board wire and double-check everything. I have rushed in to this kind of thing before and regretted it.
Dave On Mon, 27 Nov 2023 at 15:10, Brian White <[email protected]> wrote: > I am absolutely certain that every one of these connections is correct. > > https://photos.app.goo.gl/mzJbKM3cWJ8AgGic8 > > > This is essentially a MiniNDP (which is essentially a Node Datapac but > with a single large sram), minus the battery stuff, in the form of all > through-hole dip parts on a breadboard. > > I think I deduced how the 2-bank 512k rampac is supposed to work by a > combination of studying the single bank 256k datapac and capturing bus > traffic from ram100.co when it tries to access the 2nd bank. > > I already drew up an updated schematic and pcb and ordered some pcbs, but > still I figured since I actually have dip versions of all the chips, and > it's only 5 chips plus the sram, I'd try to breadboard the whole thing and > use that to see if it works first. Start with a simple copy of the > known-working 256k circuit, then once that is verified, add my guess at the > few changes to support bank1 and 512k. > > For some strange reason I hesitate to actually try it now. Might have > something to do with the 3 or 4 errors I already found and corrected along > the way. > > -- > bkw >
