Thanks for posting the pics on Google; makes it a lot easier to follow. m ----- Original Message ----- From: Brian White To: Model 100 Discussion Sent: Sunday, January 15, 2017 7:35 AM Subject: Re: [M100] Model 600 opt rom
I have recieved the Molex sockets. 134 sockets. Anyone wants one, or a few, just tell me. I'll give most of them away for the cost of mailing. I only paid $30 for the lot. They are useful for 2 things: * Programming a 27C256 that's already in a carrier. This is for Model 600. https://goo.gl/photos/rxtctgxYvvrsjiDR6 * Programming a Figtronix 28C256 module. This is for Model 100/102/200, and requires the complimentary Figtronix "programming adapter". (You install pin headers on one side of the board, to go into the programmer, and install the socket on the other side of the board. The board just un-scrambles the pinout from the module back to a 28C256 pinout.) https://oshpark.com/shared_projects/LfdyAK6a https://oshpark.com/shared_projects/4vDl1ecB https://goo.gl/photos/XSQrBshVY44xbp687 You can program the 100/102/200 module other ways. If you happen to have either a dip28 or a soic28 test clip, and 28 jumper wires. But it's not as convenient to set up the wires, and the test clip alone costs $30 or more. But if you're building the module, then you already have everything to build the programming adapter even easier. One thing, at this moment, the programming adapter design up on oshpark currently has holes that are too small for the pins on the Molex socket. Until the design is updated, you can solder a regular dip28 socket to the board instead of the special Molex socket, and then stick the Molex socket into the regular socket. Another thing: You might not need any special programming adapter or test clip ultimately. There is a different option rom module that isn't verified yet, but it uses a low profile plcc socket instead of a soldered soic. https://oshpark.com/shared_projects/iY7EaSqU If that one works out, then you would only need the regular plcc adapter that you can get in a kit along with the programmer. To reprogram it, you would just remove the eprom from the m100 module, so you wouldn't need any special pin-remapping adapter, and you wouldn't need a Molex socket either. That module needs to use a surface mount plcc socket (through-hole sockets are too tall), so it's impossible to solder with a pencil. I have assembled a couple of those boards using nothing but flux, solder paste syringe, and a $22 heat gun off the shelf at a local store: http://www.microcenter.com/product/391369/Multi-Function_Mini_Heat_Gun_with_2_Speed-Temperature_Settings http://www.microcenter.com/product/444659/SRA_Low_Temp_Solder_Paste_-_053_oz http://www.microcenter.com/product/444655/SRA_No-Clean_312_Flux_Pens Oh and these... https://www.amazon.com/Reading-Glasses-Lighted-See-Clearly/dp/B007U7IF8K/ That heat gun is NOT a really intended for soldering. I just used it to prove if one could or not. The answer is if you are careful, yes you can. The point is, you don't HAVE to spend a lot on tools if you don't already have a full proper soldering station. Good tools are better, but it's not a bar to entry. I am still waiting for some plcc 28C256 to come in the mail, so it's not tested yet. Even if it checks out electrically, the steps to build are kind of janky. You have to sand down two sides of the plcc socket to make it fit inside the Molex socket, and you have to further sand a chamfer on two edges of the plcc socket so that they don't push on the pins in the Molex socket, which would push the Molex pins away from making contact with the "castelated" terminals on the pcb. Plus the hot air soldering is trickier to get right than soldering the soic chip with a pencil. So I don't know if this is preferable to the soic chip module or not. https://goo.gl/photos/UYJohbg5qxcGu2KB9 --- I have also recieved my order of 9 carriers with 27C256 in them too, http://www.ebay.com/itm/262794713841 and have taken an original Model 600 MultiPlan rom and copied it to a new 27C256 and installed it and ran it. It worked!. So, if we can ever find the basic rom, or any other rom, there is no problem copying it and writing it to a new eprom. I went ahead and dumped the other 4 system roms too. They are all the same HN613256P chip, and all socketed, so it's nothing to read them, edit them, and write the hacked copy to a new 27C256. Don't even need the special Molex carrier for those. (not that I'd have a clue where to begin picking them apart to actually hack them. https://drive.google.com/drive/folders/0Bys6eLbSbYyhSFhFZ29TSEZkTUk --- PHEW! -- bkw On Tue, Jan 10, 2017 at 8:24 PM, John R. Hogerhuis <[email protected]> wrote: Well if you end up being able to program them with Model 600 BASIC I'd be interested in getting 2 since I have two Model 600's. -- John.
