Should work just fine. You can even drive the HDD with the PBI BIOS on an U1MB machine. To all intents and purposes, the SD card behaves like a CF card in a SIDE cart.
OK I got this working fairly good for my needs. I bought an SD to CF adapter that you commented about further up the thread. I put this in my Side2 cartridge and FDISK'ed it with my UM1 and put several partitions on it and the on the PC I recopied all the stuff I wanted on it like the PDM.XEX and supplied S2SDX.car and S2LOADER.car, games and some basic programs. But I can't get the basic programs to run it just goes to the READY prompt but doesn't load the basic program like the Side2 and UM1.
Oh and also the OSXEX rom. and latest 014 build is flashed.
Also basic doesn't work with the SD card CF adapter using the Side2 and UM1 setup.
Edited by rdea6, Wed Aug 22, 2018 11:07 PM.