I have stock of REX :) Greg
On Mon, Dec 17, 2018 at 7:56 AM Josh Malone <josh.mal...@gmail.com> wrote: > Hello Charles! Welcome to Club 100 :) > > You are correct about the ports under the ROM door. The 40-pin DIP is the > system bus connector; it's used for direct system bus peripherals such as > the Disk/Video Interface. The odd Molex socket is for Option ROM modules. > BITD, you would buy software from Radio Shack and it would come on ROM > modules which they would install for you at purchase time. A fair amount of > third-party software was also available shortly thereafter, and came on > modules that used various form-factors to be compatible with this socket. > > In modern-day use, the most popular options for option ROMs is to use a > REX, which is a modern flash-based multi-bank ROM that allows you to have > multiple option ROM images "installed" in your machine and switch between > them using a software menu. It has other cool features, too. > > http://bitchin100.com/wiki/index.php?title=REX > > REX can be purchased online from: > > > https://www.arcadeshopper.com/wp/?page_id=11#!/REX/p/102954443/category=28313042 > > but it looks like he might be out of stock at the moment (basically > meaning - I need to assemble some more; full disclosure: I did not design > REX, I merely assemble them). > > While we're doing intros, have you addressed the internal memory battery, > yet? If it hasn't been replaced yet, it is probably leaking and poses > serious risk to your system logic board due to corrosion. > > -Josh > > On Mon, Dec 17, 2018 at 9:40 AM Charles Hudson <clh...@gmail.com> wrote: > >> Hello to the members of the bitchin100 mailing list. I am a newcomer to >> the list and am posting here - at the suggestion of MikeS - because I am >> the new owner of a Model 100. It is my first TRS and I have a lot to >> learn, although the VCFED members have helped where they can. >> >> I have some documentation: the Radio Shack Model 100 manual and a book >> The TRS-80 Model 100 Computer, by David Lein. But I have a question about >> the expansion ROM port and am hoping someone can help me to understand >> better: >> >> In the expansion bay are two sockets; a 28-pin and a 40-pin. The 40-pin >> is referenced on page 208 of the RS manual as "40-pin extended bus" and a >> chart of the signals is given along with a pinout diagram. What is the >> purpose of this bus? Was / is there any device that used it? >> >> Am I correct in assuming the 28-pin socket is used for the ROM Module >> Cartridge referenced on page 8 of the RS manual? >> >> Thanks for your replies. >> >> -CH- >> >> picture attached. >> >> >> >> >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> >> Virus-free. >> www.avast.com >> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> >> <#m_-1173785335615547229_m_3900484543054788430_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> >
