diff --git a/src/harddisk.a b/src/harddisk.a
index 341b273..e8c32c2 100644
--- a/src/harddisk.a
+++ b/src/harddisk.a
@@ -10,7 +10,7 @@ HardDiskName_e
 ; which should be a hard disk
 ;
 ; in:    HardDiskArray populated
-;        user's select target is a hard disk
+;        user's selected target is a hard disk
 ;        ProDOS is not in memory
 ; out:   if C set, create or open failed (A contains MLI error code)
 ;        if C clear, everything succeeded (A is clobbered)
diff --git a/src/memory.a b/src/memory.a
index 73709d7..4f92822 100755
--- a/src/memory.a
+++ b/src/memory.a
@@ -39,6 +39,19 @@ SwapProDOS
          plp
 -        rts
 
+;-------------------------------
+; MoveT00PakLow/MoveT00PakHigh
+;
+; Copy compressed blob of track 0 patchers
+; from low memory to high memory or vice versa.
+; Each entry point is always safe to call,
+; e.g. if the blob is already low and you call
+; MoveT00PakLow, it just exits.
+;
+; in:    none
+; out:   if blob needs to be copied, exits via CopyMemory
+;        if no action, all registers preserved
+;-------------------------------
 MoveT00PakLow
          bit   T00PakPtr+1
          bpl   -          ; already low
diff --git a/src/mli.a b/src/mli.a
index 7e7528a..dd33340 100755
--- a/src/mli.a
+++ b/src/mli.a
@@ -98,7 +98,7 @@ SetMark
          sta   mliparam+1 ; store file reference number
          lda   #CMD_SETMARK ; MLI set_mark command
          ldy   #PC_SETMARK ; number of params for 'set_mark' cmd
-         bne   JsrMLIAndReturnPlus1
+         bne   JsrMLIAndReturnPlus1 ; always branches
 
 ;-------------------------------
 ; write to an open file via ProDOS MLI
@@ -115,7 +115,7 @@ WriteFile
          sta   mliparam+1 ; store file reference number
          lda   #CMD_WRITE ; MLI write command
          ldy   #PC_WRITE  ; number of parameters for 'write' command
-         bne   JsrMLIAndReturnPlus1
+         bne   JsrMLIAndReturnPlus1 ; always branches
 
 ;-------------------------------
 ; set file size in an open file via ProDOS MLI
@@ -132,7 +132,7 @@ SetEOF
          sta   mliparam+1 ; store file reference number
          lda   #CMD_SETEOF ; MLI set_eof command
          ldy   #PC_SETEOF ; number of params for 'set_eof' cmd
-         bne   JsrMLIAndReturnPlus1
+         bne   JsrMLIAndReturnPlus1 ; always branches
 
 ;-------------------------------
 ; get volume name of disk in specific slot+drive
@@ -163,7 +163,7 @@ GetVolumeName
 Online
          lda   #CMD_ONLINE
          ldy   #PC_ONLINE
-         bne   mli
+         bne   mli ; always branches
 
 ;-------------------------------
 ; query volume information
@@ -270,17 +270,17 @@ CreateBinFile
 CreateTxtFile
          ldy   #$04
          lda   #$01
-+        sta   mliparam+7            ; storage type (directory or file)
++        pha                         ; storage type (directory or file)
          sty   mliparam+4            ; file type (directory or binary)
          lda   #FULL_ACCESS
          sta   mliparam+3            ; access bits (full access)
          lda   #0
-         sta   mliparam+5            ; aux type (none)
-         sta   mliparam+6
-         sta   mliparam+8            ; creation date (current)
-         sta   mliparam+9
-         sta   mliparam+10           ; creation time (current)
-         sta   mliparam+11
+         ldy   #6
+-        sta   mliparam+5,y          ; aux type (none) + creation datetime (current)
+         dey
+         bpl   -
+         pla
+         sta   mliparam+7            ; storage type (directory or file)
          lda   #CMD_CREATE           ; MLI create command
          ldy   #PC_CREATE            ; number of parameters for 'create' command
          bne   mli                   ; always branches