Clarify that PhyMode setting is platform-specific

zuluscsi.ini

@@ -1,6 +1,6 @@
 
 [SCSI]
-# Settings that apply to all SCSI ids
+# Settings that apply to all SCSI IDs
 
 # Select a system preset to apply default settings
 # Known systems: "Mac", "MacPlus"
@@ -8,11 +8,14 @@
 
 #Debug = 0   # Same effect as DIPSW2, enables verbose log messages
 #SelectionDelay = 255   # Millisecond delay after selection, 255 = automatic, 0 = no delay
-#PhyMode = 0   # 0: Best available  1: PIO  2: DMA_TIMER  3: GREENPAK_PIO   4: GREENPAK_DMA
 #Dir = "/"   # Optionally look for image files in subdirectory
 #Dir2 = "/images"  # Multiple directories can be specified Dir1...Dir9
 #DisableStatusLED 1 # 0: Use status LED, 1: Disable status LED
 
+# NOTE: PhyMode is only relevant for ZuluSCSI V1.1 at this time.
+#PhyMode = 0   # 0: Best available  1: PIO  2: DMA_TIMER  3: GREENPAK_PIO   4: GREENPAK_DMA
+# The PhyMode parameter has no effect on ZuluSCSI RP2040-based platforms, as there is only one PHY mode.
+
 # Settings that can be needed for compatibility with some hosts
 #Quirks = 0   # 0: Standard, 1: Apple, 2: OMTI, 4: Xebec, 8: VMS
 #EnableUnitAttention = 0 # Post UNIT_ATTENTION status on power-on or SD card hotplug