#######################################
         Genealogy of kernel support for the
              Promise FastTrak TX2000
                   AKA PDC20271
       #######################################


The file locations are relative to $KERNEL_DIR/drivers/ide/


   2.4.18 (vanilla)    20271 added     2.4.18-14 (RedHat)
   ================     -------->      =================
no support for PDC20271               does support PDC20271
pdc202xx.c                            pdc202xx.c
pdcraid.c                             pdcraid.c

      |
      | some changes
      v
                        major
   2.4.20 (vanilla)     changes        2.4.20-20.9 (RedHat)
   ================     - - - - >      =================
no support for PDC20271               does support PDC20271
pdc202xx.c                            pci/pdc202xx_new.c
pdcraid.c                             raid/pdcraid.c
                                            ^
      : major               IDENTICAL       |
      : changes   +-------------------------+
      :           |
      v           v
		  
                        minor
   2.4.21 (vanilla)     changes           2.4.21-ac4
   ================     ------->       =================
does support PDC20271                 does support PDC20271
pci/pdc202xx_new.c                    pci/pdc202xx_new.c
raid/pdcraid.c                        raid/pdcraid.c

                                            ^
      | minor               IDENTICAL       |
      | changes   +-------------------------+
      |           |
      v           v
		  
                        improved
   2.4.22 (vanilla)     documentation      2.4.22-ac1
   ================     ------->       =================
does support PDC20271                 does support PDC20271
pci/pdc202xx_new.c                    pci/pdc202xx_new.c
raid/pdcraid.c                        raid/pdcraid.c