;-------------------------------
; Passport maintains a table of codes for each sector on the disk.
; One byte per sector, arranged in increasing logical sector order
; from T00,S00 to T22,S0F. Some sectors have their own individual
; labels for convenience, but you can use math to find any specific
; sector.
; e.g.
;        LDA   #kSectorOptional
;        STA   T00S0A
; will mark T00,S0A as optional
;
;        LDA   #kSectorOptional
;        LDY   #$0A
;        STA   T00,Y
; will also mark T00,S0A as optional
;
; The sector map is reset for each disk (to #kSectorRequired for
; all sectors), then modified based on boot sector identification
; and other factors.
;
; Codes are opaque values, not bit flags.
; Some codes are grouped into ranges that are compared as integers.
; Always use labels for comparison.
;
kSectorIgnore   = $00                ; ignore this sector (don't even read it)
kSectorOptional = $01                ; sector is optional (read, but errors are non-fatal)
kSectorSwitchToBuiltinRWTS = $FE     ; sector is required, and switch to built-in RWTS before reading it
kSectorRequired = $FF                ; sector is required (errors are fatal)

; range of codes that trigger various custom routines before reading a sector
kSectorCustomFirst = $C0
kSectorCustomLast = $D0
; specific codes
kSectorResetAdaptiveRWTS = $C0       ; will accept any epilogue on next sector, then remember it
kSectorIgnoreAddressChecksum = $C1   ; will ignore address field checksum
kSectorCustomDOS32B4BB = $C2         ; DOS 3.2 / JMP B4BB RWTS swapper
kSectorCustomEarthware = $C3         ; Earthware reverse RWTS swapper
;-------------------------------
InitSectorMapWithIgnore
         lda   #kSectorOptional
         !byte $2C
InitSectorMap
         lda   #kSectorRequired
         ldx   #<sectormap
         stx   @B+1
         ldx   #>sectormap
         stx   @B+2
         ldx   #$22
@A       ldy   #$0F
@B       sta   $FFFF
         inc   @B+1
         bne   +
         inc   @B+2
+        dey
         bpl   @B
         dex
         bpl   @A
         rts

sectormap = $CD0
T00       = sectormap
T00S00    = T00
T00S08    = T00 + $08
T00S09    = T00 + $09
T00S0A    = T00 + $0A
T00S0B    = T00 + $0B
T00S0C    = T00 + $0C
T00S0D    = T00 + $0D
T00S0E    = T00 + $0E
T00S0F    = T00 + $0F

T01       = T00 + $10
T01S0F    = T01 + $0F

T02       = T01 + $10
T02S04    = T02 + $04
T02S05    = T02 + $05
T02S07    = T02 + $07
T02S0A    = T02 + $0A
T02S0C    = T02 + $0C
T02S0F    = T02 + $0F

T03       = T02 + $10

T04       = T03 + $10

T05       = T04 + $10

T06       = T05 + $10

T07       = T06 + $10

T08       = T07 + $10

T09       = T08 + $10

T0A       = T09 + $10

T0B       = T0A + $10

T0C       = T0B + $10

T0D       = T0C + $10

T0E       = T0D + $10

T0F       = T0E + $10

T10       = T0F + $10

T11       = T10 + $10
T11S0F    = T11 + $0F

T12       = T11 + $10

T13       = T12 + $10

T14       = T13 + $10
T14S06    = T14 + $06

T15       = T14 + $10

T16       = T15 + $10

T17       = T16 + $10

T18       = T17 + $10

T19       = T18 + $10

T1A       = T19 + $10

T1B       = T1A + $10

T1C       = T1B + $10

T1D       = T1C + $10

T1E       = T1D + $10

T1F       = T1E + $10

T20       = T1F + $10

T21       = T20 + $10

T22       = T21 + $10
T22S0F    = T22 + $0F