Wow! I had no idea so many variations existed but I guess there was a good market for third party versions at that time.
Thanks for posting that; BTW, mine are different from all of those ;-) m ----- Original Message ----- From: eddie edwards To: Model 100 Discussion Sent: Wednesday, November 09, 2016 3:05 AM Subject: Re: [M100] Model 100: diagnosing memory errors Over the years I've seen several types of ram that could go into the m100. As others have stated, some types had a really tight fit. https://1drv.ms/w/s!AgRHXuUu57CeggMN6tlI51SgyQdX m100 nec8201a ram types.docx 1drv.ms Microsoft Word Document ------------------------------------------------------------------------------ From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein <mhs.st...@gmail.com> Sent: Monday, November 7, 2016 10:46:25 PM To: Model 100 Discussion Subject: Re: [M100] Model 100: diagnosing memory errors > That means that the bizarre M100 memory module (pinout anyways) was used by more than one machine. Not necessarily, they may just be late model M100 RAM upgrade modules; they certainly look cheaper to build than the original 4 chip version. My memory ain't what it used to be, but ISTR seeing modules like that before somewhere; I'll have to dig around a bit. The single chip RAM modules in mine are different though; they use a full-size 6264 RAM chip with *two* support chips on the bottom. m ----- Original Message ----- From: "Stephen Adolph" <twospru...@gmail.com> To: "Model 100 Discussion" <m100@lists.bitchin100.com> Sent: Monday, November 07, 2016 1:21 PM Subject: Re: [M100] Model 100: diagnosing memory errors >I am astounded. > That means that the bizarre M100 memory module (pinout anyways) was > used by more than one machine. > > On Mon, Nov 7, 2016 at 1:09 PM, Brian White <bw.al...@gmail.com> wrote: >> The entire module fits directly in the same sockets as the original ceramic >> modules. The height is more than low enough even in a socket, not just >> soldered on the board. Even in a socket, there is still 0.22" between the >> tallest point on this module and the back of the keyboard. >> >> http://facebook.com/Brian.K.White/posts/pcb.1190283307698845 >> >> As for desoldering, I did it with flux and wick, following a youtube video >> that showed the process. I had soldered a lot before (I had a ham license >> since I was 11 in 81) but had never tried to desolder a dip before. So maybe >> it was no problem because I was already at least comfy with soldering in >> general, but following the video did explain it and it was simple to follow, >> given that explaination and exhibition. Just youtube search "desolder dip" I >> think will find a few different ones. >> >> I did it to replace the system rom with an updatable eprom module to put the >> y2k patched m102 rom into both my 100s and 102. >> >> >> On Nov 7, 2016 11:26 AM, "Stephen Adolph" <twospru...@gmail.com> wrote: >>> >>> Brian, >>> >>> does this part work "plug and play" in the M100. >>> >>> http://ebay.com/itm/251666092812 >>> >>> If so that would be huge news (at least to me). >>> >>> Do you have a pinout for this module? >>> >>> thanks >>> Steve >>> >>> >>> On Mon, Nov 7, 2016 at 10:39 AM, Brian White <bw.al...@gmail.com> wrote: >>> > Luckily, you can get ram for both 100 and 102 fairly cheaply. I have >>> > seen >>> > m100 ram on ebay before for $30 per chip, but forget those. >>> > >>> > This works in model 100. I have several myself. Order 1 more than you >>> > need. >>> > Mine arrived in perfect shape, but others have recieved them with pins >>> > smashed in shipping. Remember this item is a lot of 2 chips, so 2 items >>> > is 4 >>> > chips which completely fills a Model 100. 3 items leaves you 2 chips >>> > extra >>> > in case one doesn't make it through the mail or you damage one or you >>> > just >>> > want one to repair another m100. >>> > >>> > http://ebay.com/itm/251666092812 >>> > >>> >>> > bkw >>> >
