On Fri, Jul 7, 2017 at 3:33 AM, Brian White <[email protected]> wrote: > A) Where does one buy those edge pin things? I've seen those before, but > couldn't actually find anywhere to buy them. It would have been perfect for > a replacement rom adapter board for the main rom inside a model 100 without > having to desolder the original socket to make enough room for the new,
http://www.dasarodesigns.com/product/batten-and-allen-ba3760-dill-leadframe-dip-pcb-edge-clip-pins/ I contacted the owner of this page and he sent me the requested quantity. It's not cheap, but as I said, nothing else I've tried would make a module fit in the M10. > B) This picture sure as hell looks like ordinary pins in ordinary holes... > https://www.dropbox.com/s/1p9tz1jgirbfaee/IMG_1601.JPG?dl=0 looks like, but they are the same Batten & Allen mounted without the side clip. That is because I found easier to route some signals on a 700 mil board. Using the pins with the side clips requires a narrower PCB, I have made both versions anyway. > > In any event, for ram in the model 100, regular pins are fine (round ones > anyway. There's plenty of room for the board to overhang and there aren't > even sockets in most positions anyway. Those NEC branded modules I mentioned > were built exactly like that. They are a regular green pcb with standard > round pins in holes. > https://goo.gl/photos/gGVSWwGiv9NSwveR7 looks like the socket there is a very low profile one. On my M10 (and I guess all M10 around), the sockets are the classic kind with no round holes. And they're tall enough. Frank > > On Thu, Jul 6, 2017 at 3:25 PM, Lee Olivares <[email protected]> wrote: >>> >>> not at all. All the modules use the Batten & Allen "IC pin replacements" >> >> Hey I'd never seen these "pin replacements", probably not what you're >> referring to, but in a similar vein: >> >> >> http://www.dasarodesigns.com/product/batten-and-allen-ba3760-dill-leadframe-dip-pcb-edge-clip-pins/ >> >> Overall definitely a better idea than socketing full strip headers, which >> I was never exceedingly happy about. >> >> On Thu, Jul 6, 2017 at 1:47 AM, Francesco Messineo >> <[email protected]> wrote: >>> >>> On Thu, Jul 6, 2017 at 10:17 AM, Brian White <[email protected]> wrote: >>> > Wow those sure look perfect. Especially that last one because it uses >>> > easy >>> > to source pin headers for legs. >>> >>> not at all. All the modules use the Batten & Allen "IC pin >>> replacements". There's no room (at least into the Olivetti M10) to use >>> standard pin strips, the vertical clearance isn't enough. >>> >>> Frank >>> > >>> > -- >>> > bkw >>> > >>> > On Jul 6, 2017 3:13 AM, "Francesco Messineo" >>> > <[email protected]> >>> > wrote: >>> >> >>> >> Hello, >>> >> I'm new to this list, I've been just reading for a while. >>> >> >>> >> On Thu, Jul 6, 2017 at 6:14 AM, Brian White <[email protected]> >>> >> wrote: >>> >> > 102 is easy. 100 is not so easy. >>> >> > >>> >> > There was a guy in Romania selling NEC branded modules dirt cheap >>> >> > last >>> >> > year >>> >> > but those are gone now. Or at least they're not on ebay any more. >>> >> > They >>> >> > weren't labeled for model-100, I just found them by searching for >>> >> > the >>> >> > main >>> >> > chip number, took a chance, and they turned out to not only fit but >>> >> > also >>> >> > work. Maybe I should save his info before I lose track of it, in >>> >> > case he >>> >> > does still have some. >>> >> > >>> >> > Maybe modules for 100 are another good candidate for an open OSH >>> >> > Park >>> >> > design >>> >> > that people can build new on-demand. The basic wiring for adapting >>> >> > to >>> >> > some >>> >> > more common chips is well documented. >>> >> > >>> >> >>> >> I've made many RAM modules replacement for the Olivetti M10 (and all >>> >> the other compatibles) for some friends that asked for batches of >>> >> them. >>> >> Here's how one module looks like inside my M10: >>> >> >>> >> https://www.dropbox.com/s/iwyjg7p22c8xt5t/IMG_1484.JPG?dl=0 >>> >> >>> >> I've developed also a custom setup to test the modules outside the M10 >>> >> (socket was getting >>> >> worn out during my prototype tests): >>> >> >>> >> https://www.dropbox.com/s/38q01n8gckuz3of/IMG_1906.JPG?dl=0 >>> >> >>> >> And here's one of the batches I've made for an italian collector: >>> >> >>> >> https://www.dropbox.com/s/c5zes6lgevdkz2n/IMG_0266.JPG?dl=0 >>> >> >>> >> And here's another version of the module with slightly different logic >>> >> to use different SRAM >>> >> chips: >>> >> >>> >> https://www.dropbox.com/s/1p9tz1jgirbfaee/IMG_1601.JPG?dl=0 >>> >> >>> >> The test setup include different address and block tests and also a >>> >> standby current measurement as these modules must not draw more than >>> >> 2-4 uA during standby conditions to allow the memory battery backup >>> >> last a reasonable amount of time. >>> >> Most of the modules settle to much less than 1 uA standby current. A >>> >> few ones went up to 1 uA. The original modules can draw up to 4 uA in >>> >> standby mode. >>> >> >>> >> Best regards >>> >> Frank IZ8DWF >>> >> >>> >> > -- >>> >> > bkw >>> >> > >>> >> > On Jul 5, 2017 10:29 AM, "Jason Benson" <[email protected]> >>> >> > wrote: >>> >> >> >>> >> >> I want to fix the 8201A but I haven't had any luck yet determining >>> >> >> the >>> >> >> cause of the trouble. (see other thread about internal NiCd >>> >> >> batteries) >>> >> >> >>> >> >> On Wed, Jul 5, 2017 at 10:05 AM, Josh Malone >>> >> >> <[email protected]> >>> >> >> wrote: >>> >> >>> >>> >> >>> What happened to the 8201A? It might be more beneficial to just >>> >> >>> repair >>> >> >>> that. >>> >> >>> >>> >> >>> I can tell you from experience that SRAMs for the model-T are easy >>> >> >>> to >>> >> >>> come by. (I recently replaced a RAM chip in my 102 w/ parts from >>> >> >>> ebay) >>> >> >>> No >>> >> >>> reason to scavenge other machines for these parts. >>> >> >>> >>> >> >>> -Josh >>> >> >>> >>> >> >>> On Wed, Jul 5, 2017 at 9:19 AM, Jason Benson >>> >> >>> <[email protected]> >>> >> >>> wrote: >>> >> >>>> >>> >> >>>> My 8201A that died the first time I tried to use it has a full >>> >> >>>> set of >>> >> >>>> ram expansions. Are those ram expansions usable in any of the >>> >> >>>> other >>> >> >>>> computers from the M100 family? I imagine the NEC PC 8300 >>> >> >>>> probably >>> >> >>>> uses the >>> >> >>>> same chips, but probably not the M100/102. >>> >> >>>> -Jason >>> >> >>> >>> >> >>> >>> >> >> >>> >> > >> >> >> >> >> -- >> >> - Lee >> - 909.437.0250 >> - Destroying technology problems. > >
