; ---------------------------------------------------------------------------
 ; I/O: MMU
 
-MMU_CR           := $FF00
-MMU_CFG_CC65     := %00001110    ; Bank 0 with kernal ROM
-MMU_CFG_RAM0     := %00111111    ; Bank 0 full RAM
-MMU_CFG_RAM1     := %01111111    ; Bank 1 full RAM
-MMU_CFG_RAM2     := %10111111    ; Bank 2 full RAM
-MMU_CFG_RAM3     := %11111111    ; Bank 3 full RAM
-MMU_CFG_INT_FROM := %01010111    ; Bank 1 with Internal Function RAM/ROM
-MMU_CFG_EXT_FROM := %01101011    ; Bank 1 with External Function RAM/ROM
+MMU_CR          := $FF00
+MMU_CFG_CC65    := %00001110    ; Bank 0 with kernal ROM
+MMU_CFG_RAM0    := %00111111    ; Bank 0 full RAM
+MMU_CFG_RAM1    := %01111111    ; Bank 1 full RAM
+MMU_CFG_RAM2    := %10111111    ; Bank 2 full RAM
+MMU_CFG_RAM3    := %11111111    ; Bank 3 full RAM
+MMU_CFG_IFROM   := %01010111    ; Bank 1 with Internal Function RAM/ROM
+MMU_CFG_EFROM   := %01101011    ; Bank 1 with External Function RAM/ROM
 
 ; ---------------------------------------------------------------------------
 ; Super CPU
 
         stx     FETVEC
         stx     STAVEC
         ldy     #0
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         sei
         jsr     FETCH
         tax
         inx
         txa
         sta     tmp1
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         sei
         jsr     STASH
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         jsr     FETCH
         cli
         cmp     tmp1
 
 ; Transfer one page
 
-@L1:    ldx     #MMU_CFG_EXT_FROM
+@L1:    ldx     #MMU_CFG_EFROM
         jsr     FETCH
         sta     window,y
         iny
 ; Transfer one page. Y must be zero on entry
 
 @L1:    lda     window,y
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         jsr     STASH
         iny
         bne     @L1
 
         ldy     #$00
         sei
-@L1:    ldx     #MMU_CFG_EXT_FROM
+@L1:    ldx     #MMU_CFG_EFROM
         jsr     FETCH
         sta     (ptr2),y
         iny
         sta     tmp1
 
         ldy     #$00
-@L3:    ldx     #MMU_CFG_EXT_FROM
+@L3:    ldx     #MMU_CFG_EFROM
         jsr     FETCH
         sta     (ptr2),y
         iny
         sei
         ldy     #$00
 @L1:    lda     (ptr2),y
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         jsr     STASH
         iny
         bne     @L1
 
         ldy     #$00
 @L3:    lda     (ptr2),y
-        ldx     #MMU_CFG_EXT_FROM
+        ldx     #MMU_CFG_EFROM
         jsr     STASH
         iny
         dec     tmp1
 
         stx     FETVEC
         stx     STAVEC
         ldy     #0
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         sei
         jsr     FETCH
         tax
         inx
         txa
         sta     tmp1
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         sei
         jsr     STASH
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         jsr     FETCH
         cli
         cmp     tmp1
 
 ; Transfer one page
 
-@L1:    ldx     #MMU_CFG_INT_FROM
+@L1:    ldx     #MMU_CFG_IFROM
         jsr     FETCH
         sta     window,y
         iny
 ; Transfer one page. Y must be zero on entry
 
 @L1:    lda     window,y
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         jsr     STASH
         iny
         bne     @L1
 
         ldy     #$00
         sei
-@L1:    ldx     #MMU_CFG_INT_FROM
+@L1:    ldx     #MMU_CFG_IFROM
         jsr     FETCH
         sta     (ptr2),y
         iny
         sta     tmp1
 
         ldy     #$00
-@L3:    ldx     #MMU_CFG_INT_FROM
+@L3:    ldx     #MMU_CFG_IFROM
         jsr     FETCH
         sta     (ptr2),y
         iny
         sei
         ldy     #$00
 @L1:    lda     (ptr2),y
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         jsr     STASH
         iny
         bne     @L1
 
         ldy     #$00
 @L3:    lda     (ptr2),y
-        ldx     #MMU_CFG_INT_FROM
+        ldx     #MMU_CFG_IFROM
         jsr     STASH
         iny
         dec     tmp1