Thanks! m ----- Original Message ----- From: "Stephen Adolph" <[email protected]> To: <[email protected]> Sent: Monday, September 11, 2017 12:34 PM Subject: Re: [M100] QUAD BOM
> yah sure. I'll put it at the wiki page. Steve > > On Mon, Sep 11, 2017 at 12:28 PM, Mike Stein <[email protected]> wrote: >> 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
