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https://github.com/a2-4am/passport.git
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verify Infocom 18-sector format
This commit is contained in:
Peter Ferrie
parent
7ac054c7b4
commit
8b58e3b94f
@ -53,6 +53,11 @@
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; reset before each operation
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; set in IDBootloader() after reading T00,S00
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;gIsInfocom18
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!byte FALSE ; 0=true, 1=false
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; reset before each operation
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; set in IDBootFailure() after reading T00
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FIRSTFILTER
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;gIsRDOS
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!byte FALSE ; 0=true, 1=false
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@ -99,8 +99,10 @@ gIsPanglosDOS = gIsAdvent-$01 ; byte
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gIsDavidson = gIsPanglosDOS-$01 ; byte
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gIsRDOS13 = gIsDavidson-$01 ; byte
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;LASTFILTER ; add new gIs* above this line
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;gIsInfocom18 is a special case whose ID is not in the regular inspection path
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gIsInfocom18 = gIsRDOS13-$01 ; byte
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;gMECCFastloadType is a special case integer whose default value cannot be #FALSE
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gMECCFastloadType = gIsRDOS13-$01 ; byte
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gMECCFastloadType = gIsInfocom18-$01 ; byte
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gOnAClearDayYouCanReadForever = gMECCFastloadType-$01 ; byte
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gUsingRAMDisk = gOnAClearDayYouCanReadForever-$01 ; byte
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@ -168,6 +170,7 @@ ConstructStandardDelivery = jConstructStandardDelivery
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!warn "gIsPanglosDOS=",gIsPanglosDOS
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!warn "gIsDavidson=",gIsDavidson
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!warn "gIsRDOS13=",gIsRDOS13
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!warn "gIsInfocom18=",gIsInfocom18
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!warn "gOnAClearDayYouCanReadForever=",gOnAClearDayYouCanReadForever
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!warn "gUsingRAMDisk=",gUsingRAMDisk
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!warn "gRAMDiskRef=",gRAMDiskRef
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@ -18,6 +18,14 @@ IDBootloader
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bne -
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stx gMECCFastloadType
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stx gLastTrack
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lda gIsInfocom18
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bne .sanity
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lda #s_infocom18
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jsr PrintByID
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jmp UseUniversal
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.sanity
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;
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; Quick sanity check -- only recognized values for $0800
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; are 1 or 2 for regular disks, and 5 for possible Electronic Arts.
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@ -288,3 +296,92 @@ PrereadT00Partial
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.exit
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rts
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}
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;-------------------------------
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; IDBootFailure
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; main entry point to identify the bootloader
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; when the initial read failed
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; identifies Infocom 18-sector side B disks
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; doubles as verification routine after ID
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; written by qkumba
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;
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; in: nothing
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; out: carry set if we can't ID it
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;-------------------------------
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!zone {
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IDBootFailure
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lda #FALSE
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sta gIsInfocom18
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bit gMode ; only in verify-mode
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bmi .branchno
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VerifyInfocom18
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lda $C0E9
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lda #$1A ; the length of a track
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sta tmp ; keep X register free
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ldy #0
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- iny
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bne +
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dec tmp
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beq .branchno
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+ lda $C0EC
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bpl -
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-- cmp #$D5
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bne -
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- lda $C0EC
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bpl -
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cmp #$AA
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bne --
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- lda $C0EC
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bpl -
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cmp #$AD
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beq .tryinfocom
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ldx gIsInfocom18
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beq -- ; resume if already in Infocom mode
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;;other things here in future
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.branchno
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jmp .no
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.tryinfocom
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- lda $C0EC
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bpl -
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nop
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nop ; ignore half of 4x4 track number
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- lda $C0EC
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bpl - ; ignore half of 4x4 track number
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lda #$12 ; all 18 sectors when in verify mode
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ldx gIsInfocom18
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beq .setcount
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lda #$01 ; only one sector when in ID mode
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.setcount
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sta tmp ; sector counter
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lda #$00
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-- ldy #$56
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- ldx $C0EC
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bpl -
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eor $BA00,x ; from universal RWTS
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dey
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bne -
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- ldx $C0EC
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bpl -
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eor $BA00,x ; from universal RWTS
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iny
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bne -
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- ldx $C0EC
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bpl -
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eor $BA00,x ; from universal RWTS
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bne .no
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dec tmp
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bne --
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sta gIsInfocom18
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clc ; all clear
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!byte $24
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.no
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sec
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lda $C0E8
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rts
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}
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@ -274,6 +274,8 @@ Reaction
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jsr IgnoreAddressChecksum
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jsr ReadSector
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bcc +
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jsr IDBootFailure ; /src/id/inspect0
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bcc +
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lda #s_fail
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jsr PrintByID
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lda #s_fatal0000
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@ -375,11 +377,20 @@ ReadWithRWTS
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sta checksector+2
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.read
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lda KEY
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bpl checksector
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bpl .checkinfocom
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bit STROBE
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cmp #$e0 ;ignore backtick (MAME debug break)
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beq checksector
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beq .checkinfocom
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jmp Cancel
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.checkinfocom
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lda gIsInfocom18
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bne checksector
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jsr VerifyInfocom18
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bcc .passtrack
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jmp FatalError
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.passtrack
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jmp .prevtrack
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checksector
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lda $FFFF ; status of current sector in sector map (modified above)
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pha
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@ -387,10 +398,8 @@ checksector
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bcc +
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cmp #kSectorCustomLast
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bcs +
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jsr PreReadSector
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tax
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pla
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txa
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jsr PreReadSector
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pha ; replace status (on stack) with new status returned from PreReadSector
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+ cmp #kSectorIgnore ; skip this sector?
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beq nextsector
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@ -123,6 +123,7 @@ StringTable
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!word .rdos13
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!word .ssi
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!word .aacount
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!word .infocom18
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;
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; Text can contain substitution strings, which
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; are replaced by current values at runtime. Each
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@ -148,7 +149,7 @@ StringTable
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; can be set directly before calling PrintByID.
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;
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.header
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!text "Passport by 4am 2018-10-14",$00
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!text "Passport by 4am 2018-12-28",$00
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.mainmenu
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!text "________________________________________",$8D,$8D,$8D,$8D,$8D,$8D,$8D
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!text " "
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@ -456,4 +457,6 @@ StringTable
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!text "T%t,S%0 Found SSI protection check",$8D,$00
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.aacount
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!text "T%t,S%0 Found AA nibble count",$8D,$00
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.infocom18
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!text "T00,S00 Found Infocom 18-sector format",$8D,$00
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}
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@ -109,4 +109,5 @@ s_davidson = $67
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s_rdos13 = $68
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s_ssi = $69
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s_aacount = $6A
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STRINGCOUNT = $6B
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s_infocom18 = $6B
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STRINGCOUNT = $6C
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