PORTIBM PC Portable (uses same BIOS as XT) 015C-015D - Dell Enhanced Parallel Port SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 002Eh,PORTIBM PC Portable (uses same BIOS as XT) 026Eh,PORTIBM PC Portable (uses same BIOS as XT) 0398h 015C -W index for data port 015D RW EPP command data