You could try this utility http://www.club100.org/memfiles/index.php?&direction=&order=&directory=Steve%20Adolph/ROM2S It will dump the ROM as an ASCII HEX file to a TPDD device. There are online utilities that can convert it to a binary file that could be loaded into a REX. I have used it to read mystery OPTROMs that sometimes come with the eBay machines.
However I believe some OPT ROMs have to be modified to work with the REX so the PSCG+ disk ‘might’ not work with the REX directly. Alternatively the OPTROM may already have been converted into a REX file which is worthwhile checking. There is a validated list of OPTROM images on http://bitchin100.com/wiki/index.php?title=REX Others might exist just need to check the archives. From: M100 <m100-boun...@lists.bitchin100.com<mailto:m100-boun...@lists.bitchin100.com>> on behalf of Rick Shear <rdsh...@comcast.net<mailto:rdsh...@comcast.net>> Reply-To: <m...@bitchin100.com<mailto:m...@bitchin100.com>> Date: Friday, August 10, 2018 at 3:20 AM To: <firstname.lastname@example.org<mailto:email@example.com>> Subject: [M100] Backup ROM I have a Model 100 with a PSCG Disk+ ROM in it. I am in the process of gathering all the parts to build a REX board and would like to back up the Disk+ ROM to install on the REX. I've been trying to find a utility to back the ROM up from the Model 100 to a TPDD device. Is there such a program available? Or will I have to get/build an eprom reader to get the image? I found a program on club100 (ARTROM.CO<https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2FARTROM.CO&data=02%7C01%7C%7Cfddf340effd245f29a0708d5feab3c54%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636694933758604374&sdata=%2Fz6VLSDp8LZzlWh%2BhmCH%2F5oaDJeLoJVW%2FCG5z62Cco8%3D&reserved=0>) that would read the image and send it to an eprom burner, but I don't have one of those devices and really don't need to burn a copy to an eprom. Thanks for any pointers in the right direction. Rick