Any chance of posting a schematic in pdf or png format? m
----- Original Message ----- From: "Stephen Adolph" <[email protected]> To: <[email protected]> Sent: Monday, September 11, 2017 8:44 AM Subject: Re: [M100] QUAD BOM > Brian, you should be aware > > - the hardware has a flaw. the flops don't always power up in bank 0. > - REX software does not work reliably with Quad > - the quad utilities work ok though. > > yes 2 BAV70s > > > as far as the ram goes, I would just check it to make sure it is the > same as TC551001. you might find that ram for cheap on ebay. > > > OR - redo the design to address the flop issue and with a more > available ram chip / smaller footprint. > I do my designs for parts I have... > > steve > > > On Mon, Sep 11, 2017 at 12:27 AM, Brian White <[email protected]> wrote: >> Hey Steven, I think I worked up a DigiKey cart to build 3 QUADs, the version >> on osh park now. >> >> 2 things I'm not sure about: >> >> The text on oshpark says it needs a BAV70, but it looks like there are >> footprints for 2 BAV70's on that version of the board. I assume I should I >> install 2? >> >> The exact referenced memory chip is not available, but I think I narrowed it >> down to about 20 possibles, and picked one for the cart based on >> availability as much as anything else. Does this part look right? I tried to >> match, parallel, 18.4mm, 5v, forward pinout, >> >> The cart with the questionable memory chip is here: >> http://www.digikey.com/short/qcm427 >> >> Ignore the pins. The price is ridiculous, but I just wanted to make a cart >> that had everything for reference and completeness, and I can't find any >> pins on DigiKey that aren't stupid like that. >> >> -- >> bkw
