Or you could just program a batch of them. I imagine that's not the time consuming part.
On Monday, May 16, 2016, Stephen Adolph <twospru...@gmail.com> wrote: > the other major challenge with REX is that you need some specific > hardware to program the CPLD....can't forget that little nugget. > maybe an offshore shop could do that however. > > > On Mon, May 16, 2016 at 8:54 PM, Stephen Adolph <twospru...@gmail.com > <javascript:;>> wrote: > > no, i have not, mostly because I feel like they can't do the M100 > > machining. I hand grind the PCBs for M100 to expose the large vias so > > they can engage the molex. So, that's an issue. Next is just the $$ > > per hour of the offshore assembling. If you have a contact Ken, I > > could actually get *facts*. > > PC-8201 is pretty easy, but the pins needed are kinda special from > > what I can tell. I only have 50 of those carriers in my parts pile, > > and I never see them on ebay. > > steve > > > > > > On Mon, May 16, 2016 at 8:50 PM, Ken Pettit <petti...@gmail.com > <javascript:;>> wrote: > >> Hey Steve, > >> > >> Did you ever look into having an assembly house build these? > >> > >> Ken > >> > >> > >> On 5/16/16 6:48 PM, Stephen Adolph wrote: > >>> > >>> ..re REX. IF I could release it to oshpark I would. In fact the > >>> boards are there. The problem is... I doubt people will be successful > >>> soldering fine pitch. Do you want to try? The chips can be purchased > >>> on ebay or digikey. > >>> If you want to try I will release the board design(s). > >>> > >>> Steve > >>> > >>> > >>> On Mon, May 16, 2016 at 8:33 PM, Brian White <bw.al...@gmail.com > <javascript:;>> wrote: > >>>> > >>>> The figtronix link broke because I asked him a question about his main > >>>> rom > >>>> adapter a couple weeks ago, and he updated the board, just the > silkscreen > >>>> not anything functional, and he removed the old link and made a new > one. > >>>> I > >>>> don't know if that's just the way oshpark works or if he's just doing > >>>> something wrong. > >>>> > >>>> He ended up doing a bunch of stuff that I wanted for free and without > >>>> asking, so I wasn't going to complain about a little thing like it's > >>>> annoying having to keep finding out the new link! > >>>> > >>>> We ended up trading a lot of emails and he whipped up both the option > rom > >>>> board and the programmer adapter after I showed him the club100 links > to > >>>> the > >>>> old EME option rom module. There were several rapid iterations of > both of > >>>> those and he did the same thing each time with those too, broke the > >>>> existing > >>>> link and made a new one. And it takes forever before they show up in > the > >>>> oshpark search too. > >>>> > >>>> (Oh yeah, don't trust that search. Find any working link to any board > by > >>>> that guy, then click on the guy's name, and THERE you see all his > other > >>>> boards, including all 3 M100-related, even though they don't show up > in > >>>> the > >>>> search.) > >>>> > >>>> Anyway there's lot's of ways to skin the same cat of course. > >>>> > >>>> I like your board too. I actually assembled one of your boards too, > but > >>>> I'm > >>>> using the figtronix at the moment, because I don't want a combined > system > >>>> and option rom, I want to be able to use the external accessible > option > >>>> rom > >>>> socket to swap roms and install commercial roms, and I want the system > >>>> rom > >>>> to be socketed and re-programmable or at least swappable. I actually > >>>> found > >>>> ceramic uv-erasable clcc 27C256, but even replacing OTP plcc ones is > >>>> better > >>>> than needing a test-clip. > >>>> > >>>> One thing I should verify, maybe there IS actually room to solder your > >>>> board > >>>> on the motherboard and put a dip socket on the adapter, then trim the > >>>> legs > >>>> of the eprom a little so the eprom sits lower in the socket, does the > >>>> resulting stack come out 0.55" or shorter? That would meet all my same > >>>> wishes above. Takes a standard eprom, and the eprom is removable and > >>>> reprogrammable with no special adapters. > >>>> > >>>> Ideally I'd like both the main and option roms to use the same kind of > >>>> eprom. not plcc in one and soic in the other. There is just barely > >>>> vertical > >>>> room for a low profile plcc socket in the option rom, but low profile > >>>> plcc > >>>> sockets are surface mount so soldering them at home is not simple like > >>>> the > >>>> regular socket with thru pins. I have old commercial option roms that > >>>> used a > >>>> full dip28 eprom on a board. it's a tight fit but it works. The holes > for > >>>> the eprom are actually pulled in a little closer than the proper dip28 > >>>> spacing, squished inside the half-holes on the edges which are at > dip28 > >>>> spacing. No room for a socket, so a board like that you could only > >>>> re-program with either a test clip or a programming adapter, but > that's > >>>> no > >>>> worse than what you already need for the soic board. But at least then > >>>> that, > >>>> along with your main rom board, means you'd have the same kind of > part on > >>>> both system and option roms. > >>>> > >>>> I mean IDEALLY of course, I'd love a REX, but I emailed the address on > >>>> club100 a couple times and never got any answer, and the plans for REX > >>>> aren't published like on oshpark, so oh well. Even if by a miracle one > >>>> REX > >>>> became available from somewhere, I still probably wouldn't want to > invest > >>>> time hacking with it if no one else could ever make use of the > results. > >>>> If > >>>> the REX were reproducible at will and anyone could have one, THEN it > >>>> would > >>>> be a worthwhile target for hacking/developing. If not, then I'd rather > >>>> just > >>>> start a new public/open design even if it's cruder and reinventing the > >>>> wheel. > >>>> > >>>> (And now that I say that, I realize I sure like my MISE, and that's > >>>> basically in the same boat. The design is not public. The guy just > >>>> happens > >>>> to be actively producing and supporting it right now. So maybe I'm > being > >>>> inconsistent. At least I made my enclosure for the MISE public, > including > >>>> a > >>>> slick non-trivial arrangement to hold the cf card reader which does > not > >>>> have > >>>> any nice mounting holes or anything, if I do say so myself. ;) ) > >>>> > >>>> In the 102 of course I just stuck a plain socket in and a plain dip > >>>> 27c256. > >>>> No complications there. Same goes for late m100 too apparently though > >>>> both > >>>> my m100's needed the adapter. > >>>> > >>>> -- > >>>> bkw > >>>> > >>>> On Mon, May 16, 2016 at 3:54 PM, Mike Stein <mhs.st...@gmail.com > <javascript:;>> wrote: > >>>>> > >>>>> Thanks for posting those links. When I mentioned the various options > for > >>>>> adding/upgrading System and Option ROMs I wanted to include this one > but > >>>>> at > >>>>> the time the link at Oshpark didn't seem to work; I couldn't find any > >>>>> mention on his Figtronix site either so I assumed they were no longer > >>>>> available for some reason. Glad to see they're back and he's added a > >>>>> programming adapter. > >>>>> > >>>>> One advantage of those boards over the board Bill and Steve are > >>>>> discussing > >>>>> is that in a T102 you can add an Option ROM without removing the > System > >>>>> ROM > >>>>> chip; however, at the risk of being immodest I should point out what > I > >>>>> think > >>>>> are some advantages of the 'Combo' board: > >>>>> > >>>>> Whether you want to upgrade the System ROM and/or add an Option ROM > in > >>>>> either an old or a new M100/T102 you use the same board; no need for > >>>>> separate System and Option ROM adapters. > >>>>> > >>>>> To (re)program the IC in an 'old' M100 you'll need another adapter to > >>>>> convert the pinout back to standard JEDEC; no problem, just assemble > >>>>> another > >>>>> adapter 'in reverse' as it were, with a socket. > >>>>> > >>>>> So the one PCB essentially does the same job as all three different > >>>>> Figtronix ones; since you get a minimum of six boards you might save > >>>>> some > >>>>> money. > >>>>> > >>>>> Finally, since it uses a standard 28-pin socket if you want to play > >>>>> around > >>>>> with the System ROM code without burning/replacing/reprogramming the > >>>>> E(E)PROM every time, replace it with a non-volatile RAM chip like the > >>>>> Dallas > >>>>> DS1230Y or the FM1808 FRAM and a minor mod to connect R/W and you can > >>>>> POKE > >>>>> around all you want.. > >>>>> > >>>>> m > >>>>> > >>>>> ----- Original Message ----- > >>>>> From: Brian White > >>>>> To: Model 100 Discussion > >>>>> Sent: Saturday, May 14, 2016 11:42 PM > >>>>> Subject: Re: [M100] ROM burning questions > >>>>> > >>>>> ...Re-post without pic... > >>>>> > >>>>> Old m100 takes a non-standard pinout, new m100 and all t102 takes a > >>>>> standard 27C256 pinout. > >>>>> > >>>>> I just did an old m100 using this plcc adapter: > >>>>> > >>>>> https://oshpark.com/shared_projects/toQDqmVV > >>>>> > >>>>> I burned the Tandy 102 rom with y2k patches from the rex page on > >>>>> bitchin100. > >>>>> > >>>>> The board is easy to assemble except the only hitch is you have to > find > >>>>> pin headers that have thinner round pins rather than the more common > >>>>> square. > >>>>> > >>>>> If you have a "new" m100, the chip number on the rom will not match > the > >>>>> number silkscreened on this board. In that case you don't need any > >>>>> adapter, > >>>>> just put in a 27C256 dip28 directly, same as for T102. > >>>>> > >>>>> https://goo.gl/photos/GUKXgxxVGaUVt57k9 > >>>>> > >>>>> -- > >>>>> bkw > >>>> > >>>> > >> >
