@leah Adding on, perhaps part of this is that it's using an AT-centric way of reading the machine's specs, asking for CMOS setup data at port 0x70. 8088-class machines don't usually have anything there. The BIOS data area https://stanislavs.org/helppc/bios_data_area.html might provide some alternate query paths, and maybe INT 0x13 function 8 to identify disc drive types and geometries.