only run rwtsswapmecc patcher on relevant MECC disks

src/id/inspect0.a

@@ -8,7 +8,8 @@
 !zone {
 IDBootloader
 ;
-; reset all per-disk globals
+; Reset all per-disk globals.
+; These are used as filters later so irrelevant patchers can be skipped.
 ;
          lda   #FALSE
          sta   gIsBoot0
@@ -20,6 +21,7 @@ IDBootloader
          sta   gIsProtDOS
          sta   gIsEA
          sta   gIsEEEF
+         sta   gIsMECCFastloader
          lda   #$00
          sta   gLastTrack
 ;
@@ -80,6 +82,8 @@ IDBootloader
 ;
 +        jsr   IDMECC
          bcs   .notmecc
+         lda   #TRUE
+         sta   gIsMECCFastloader
          lda   #s_mecc
          jsr   PrintByID
          jsr   CopyUniversal

src/passport.a

@@ -708,11 +708,11 @@ _applyToAll
          !source "patchers/prodosrwts.a"        ; gIsProDOS only
          !source "patchers/prodos6a.a"          ; gIsProDOS only
          !source "patchers/prodosmecc.a"        ; gIsProDOS only
-         !source "patchers/rwtsswapmecc.a"
+         !source "patchers/rwtsswapmecc.a"      ; gIsMECCFastloader only
          !source "patchers/protecteddos.a"      ; gIsProtDOS only
          !source "patchers/fbff.a"
          !source "patchers/sierra.a"
-         !source "patchers/corrupter.a"
+         !source "patchers/corrupter.a"         ; T13 only
          !source "patchers/ea.a"                ; gIsEA only (+gIsBoot0 for DOS titles)
          !source "patchers/gamco.a"             ; gIsEEEF only
          !source "patchers/optimum.a"           ; gIsOptimum only
@@ -802,6 +802,10 @@ gIsOptimum
          !byte FALSE      ; 0=true, 1=false
                           ; reset before each operation
                           ; set in IDBootloader() after reading T00,S00
+gIsMECCFastloader
+         !byte FALSE      ; 0=true, 1=false
+                          ; reset before each operation
+                          ; set in IDBootloader() after reading T00,S00
 gOnAClearDayYouCanReadForever
          !byte FALSE      ; 0=true, 1=false
                           ; retry reads with a captured RWTS forever,

src/patchers/rwtsswapmecc.a

@@ -1,12 +1,12 @@
 ;-------------------------------
 ; #RWTSSWAPMECC
 ; post-boot RWTS swapper in MECC
-; disks
-; TODO might be able to gate this on MECC fastloader
-; (I think it's only used on Dataquest disks)
+; fastloader disks
 ;-------------------------------
 !zone {
-_rwtsswapmecc
+         lda   gIsMECCFastloader
+         bne   .exit
+
          ldy   #$11
          jsr   SearchTrack
          !byte $0A