commentary.

volume.aii

@@ -164,13 +164,12 @@ do_block_size	proc
 do_total_blocks	proc
 	; total blocks = nzones.
 
-	; should this ask the driver?
-
 	with dp
 	with fst_parms
 
 	phy ; save
 
+	; n.b. v2 uses a 32-bit zones field; nzones is 0.
 
 	ldy #vcr.super.nzones
 	lda [my_vcr],y
@@ -189,8 +188,7 @@ do_total_blocks	proc
 
 
 do_free_blocks	proc
-	; load the  zmaps and count them up...
-	; someday.
+	; zone map was counted in id_disk:calc_free_blocks
 	with fst_parms, dp
 
 	phy