Hi Finn, I'll leave the unused !write branch in the original condition. I'd rather keep the address conversion inside the PIO code than duplicating it in each DMA setup routine though. You had asked what manual I had used a while ago: it's http://bitsavers.trailing-edge.com/components/ncr/scsi/53CF94_96-2_Fast_SCSI_Controller_Data_Manual_Apr1993.pdf Cheers, Michael On Tue, Mar 6, 2018 at 9:37 PM, Finn Thain <fthain@xxxxxxxxxxxxxxxxxxx> wrote: > On Tue, 6 Mar 2018, Michael Schmitz wrote: > >> The whole !write branch will never be executed, and I could just omit it >> entirely for now, or leave it as it was in the Mac driver. >> > > We could make use of the !write branch in zorro_esp, even if it was only > to figure out the SELAS/MSG OUT issue for the benefit of mac_esp. But > let's keep them in sync. > > -- > >> Cheers, >> >> Michael >>