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support some EA titles

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This commit is contained in:
Peter Ferrie 2017-01-30 14:10:41 -08:00
parent 3aefe224aa
commit ce945537c0
6 changed files with 389 additions and 15 deletions
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19
src/analyze.a
View File

@ -302,3 +302,22 @@ xB660
.no
rts
}
;-------------------------------
; IsEATrack6
; check if track 6 even exists
; in the case of EA, track 6 reads as track 5
;
; in slot 6, drive 1 is on track to test
; out C clear if read track does not match expected track
; C set otherwise
;-------------------------------
IsEATrack6
lda gTrack
cmp #6
sec
bne +
lda $2E ;DOS read track number
sbc #5
cmp #1
+ rts

107
src/id/ea.a Normal file
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@ -0,0 +1,107 @@
;-------------------------------
; IDEA
; identify Electronic Arts custom bootloader
;
; in: track buffer contains T00,S00
; out: C clear if EA bootloader was found
; C set if not found
; all other flags clobbered
; all registers clobbered
;
; module by qkumba
;-------------------------------
IDEA
lda #$00
tax
ldy #36
jsr compare
!byte $05,$4C,$04,$08,$A9,$00,$8D,$F2
!byte $03,$A9,$C6,$8D,$F3,$03,$49,$A5
!byte $8D,$F4,$03,$A9,$00,$8D,$C7,$09
!byte $AD,$E9,$C0,$A9,$B0,$85,$3E,$A9
!byte $02,$20,$00,$0C
bcc +
lda #$00
tax
ldy #39
jsr compare
!byte $05,$4C,$04,$08,$A9,$00,$8D,$F2
!byte $03,$A9,$C6,$8D,$F3,$03,$49,$A5
!byte $8D,$F4,$03,$A9,$00,$8D,$C7,$09
!byte $AD,$E9,$C0,$A9,$B7,$48,$A9,$B0
!byte $85,$3E,$A9,$00,$20,$00,$0C
+ rts
foundea
;
; We found an EA bootloader. Now we create
; an RWTS that can read the rest of the disk.
; Starting with our built-in RWTS, we modify address
; and data prologues based on the parameters of the
; original disk.
;
!zone {
lda #s_eab0
jsr PrintByID
jsr CopyUniversal
; mark track 6 as "skip" in sector map
ldy #$0F
lda #$00
.skipsectors
sta T06,y
dey
bpl .skipsectors
; mark track $22 as "optional" in sector map
ldy #$0F
lda #$80
.ignoresectors
sta T22,y
dey
bpl .ignoresectors
;hook read data prologue
lda #<.checktrk
sta $BE36
lda #>.checktrk
sta $BE37
;
; this RWTS alters the data prologue in a routine
; on a non-zero track, so we need to set a flag so
; we know to search for it later
;
lda #TRUE
sta gIsEA
jmp ADStyle
.prologtbl
!byte $AA, $BB, $AD, $CF
;try regular values first
.checktrk
ldy #0
lda .prologtbl, y
sta $B8F1
lda .prologtbl+2, y
sta $B8FC
jsr $B8DC
bcc +
;on failure, switch to alternative values
;we keep using the last successful values until we fail
;and then we switch again
lda .checktrk + 1
eor #1
sta .checktrk + 1
;and allow DOS to retry
;if DOS runs out of retries, then Passport will report it
+ rts
}

16
src/id/inspect0.a
View File

@ -18,14 +18,17 @@ CheckT00S00
sta gLastTrack
; Quick sanity check -- only recognized values for $0800
; are 1 or 2.
; are 1 or 2 for regular disks, and 5 for possible Electronic Arts.
lda $0800
beq +
cmp #$03
bcc ++
cmp #$05
beq ++
+
jmp UseUniversal
- jmp UseUniversal
++
;
; Copy the boot sector from $0800 to the track/sector buffer
@ -139,6 +142,15 @@ CheckT00S00
jmp TheEnd
.notencoded53
;
; Try to identify Electronic Arts bootloader.
;
.tryea
jsr IDEA
bcs .notea
jmp foundea
.notea
.useuniv
;
; We didn't recognize the boot sector, so use the universal

45
src/passport.a
View File

@ -73,6 +73,8 @@ PR0 = $FE89
IN0 = $FE93
; Zero-page addresses we use for variables
!ifdef PASS2 {
} else {
nibsrcindex = $EC ; byte
nibdestindex = $ED ; byte
prbuf = $EE ; word
@ -89,8 +91,11 @@ tmpa = $FC ; byte
tmpx = $FD ; byte
tmpy = $FE ; byte
flag = $FF ; byte
}
; Application constants (not zero addresses)
RELBASE = $6B00 ; address to move Passport code
; so that it's out of the way
BASEPAGE = $10 ; Special Delivery tracer assumes
; this is $10, so don't change it!
TRUE = $00 ; Lots of code assumes this is $00
@ -98,21 +103,20 @@ TRUE = $00 ; Lots of code assumes this is $00
; don't change it either!
FALSE = $01
FirstMover
ldy #>LastMover-FirstMover
ldx #$00
FM lda $2000,x
sta $6800,x
FM lda FirstMover + ((255 + LastMover - FirstMover) & $FF00),x
sta $B500,x
inx
bne FM
inc FM+2
inc FM+5
dey
cpy #$48
dec FM+2
dec FM+5
lda FM+2
cmp #$1F
bne FM
jmp OneTimeSetup
!pseudopc *+$4800 {
FirstMover
!pseudopc RELBASE {
!zone
; use localized strings based on current language
@ -143,6 +147,7 @@ FM lda $2000,x
!source "id/specdelivery.a"
!source "id/encode44.a"
!source "id/encode53.a"
!source "id/ea.a"
!source "print.a"
!source "compare.a"
!source "modify.a"
@ -408,10 +413,19 @@ checksector
;
.checksync
jsr IsSyncBytes
bcs .tryuniversal
bcs .checktrack6
lda #s_sync
jsr PrintByID
;
; 4) track simply does not exist (Electronic Arts in particular)
;
.checktrack6
jsr IsEATrack6
bcs .tryuniversal
lda #s_eatrk6
jsr PrintByID
; note: execution falls through here
.skiptrack
@ -710,6 +724,7 @@ _applyToAll
!source "patchers/protecteddos.a"
!source "patchers/fbff.a"
!source "patchers/sierra.a"
!source "patchers/ea.a"
lda gPatchCount
beq .nopatches
@ -766,11 +781,19 @@ gIsProtDOS
!byte FALSE ; 0=true, 1=false
; set after reading T00
gIsEA
!byte FALSE ; 0=true, 1=false
; set after reading T00
gOnAClearDayYouCanReadForever
!byte FALSE ; 0=true, 1=false
; compile-time flag, no way to change at runtime
!source "applyglobals.a"
!source "universalrwts.a"
LastMover
}
LastMover
!if ($B500 - ((255 + LastMover - FirstMover) & $FF00)) != RELBASE {
!serious "RELBASE requires adjustment to ", ($B500 - ((255 + LastMover - FirstMover) & $FF00))
}

205
src/patchers/ea.a Normal file
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@ -0,0 +1,205 @@
;-------------------------------
; #EA
; patched RWTS and p-code madness
;
; module by qkumba
;-------------------------------
!zone {
_ea
lda gIsEA ; only ever seen this protection
beq + ; on Electronic Arts titles
jmp .dostitles
+ ldy #40
jsr SearchTrack
!byte $8D,$6F,$BC,$8C,$70,$BC,$A0,$20
!byte $88,$F0,$D7,$AD,$EC,$C0,$10,$FB
!byte $49,$D5,$D0,$F4,$EA,$AD,$EC,$C0
!byte $10,$FB,$C9,$BB,$D0,$F2,$EA,$AD
!byte $EC,$C0,$10,$FB,$C9,$CF,$D0,$E8
bcs +
pha
txa
clc
adc #27
tax
adc #10
sta .patch2+1
pla
pha
ldy #1
jsr modify
!byte $AA
.patch2
ldx #$D1
pla
ldy #1
jsr modify
!byte $AD
+ ldy #13
jsr SearchTrack
!byte $03, $49 ;ldi #$05
!byte $01, $03, $65 ;jsra $bc00
!byte $01, $03, $79 ;jsra $a000
!byte $03, $4C ;ldi #$00
!byte $04, $EB, $19 ;lda $c0e8
bcs +
inx
inx
inx
inx
inx
ldy #1
jsr modify
!byte $04
+ ldy #15
jsr SearchTrack
!byte $BF,$9F,$BE,$F6,$04,$2E,$9B,$DA
!byte $5A,$16,$DA,$30,$06,$45,$C2
bcs +
inx
ldy #1
jsr modify
!byte $EE
+ ldy #8
jsr SearchTrack
!byte $20,$10,$07,$A5,$56,$D0,$A7,$4C
bcs +
inx
inx
inx
inx
inx
inx
ldy #1
jsr modify
!byte $00
+ ldy #15
jsr SearchTrack
!byte $03, $49 ;ldi #$05
!byte $01, $03, $65 ;jsra $bc00
!byte $03, $4C ;ldi #$00
!byte $01, $03, $79 ;jsra $a000
!byte $07, $01 ;sub #$4d
!byte $0F, $F5, $70 ;bne $a9f6
bcs +
pha
txa
adc #7
tax
adc #4
sta .patch3 + 1
pla
pha
ldy #1
jsr modify
!byte $04
pla
.patch3
ldx #$D1
ldy #1
jsr modify
!byte $00
+ ldy #13
jsr SearchTrack
!byte $4C,$E7,$B2,$4C,$74,$B3,$00,$00
!byte $C9,$CB,$D0,$7C,$60
bcs +
pha
txa
adc #11
tax
pla
ldy #1
jsr modify
!byte $00
+ ldy #15
jsr SearchTrack
!byte $03,$49 ;ldi #$05
!byte $01,$03,$65 ;jsr $BC00
!byte $03,$4C ;ldi #$00
!byte $01,$03,$6C ;jsr $B500
!byte $07,$1C ;sub #$50
!byte $0F,$78,$60 ;bne $B97B
bcs +
pha
txa
adc #11
tax
pla
ldy #1
jsr modify
!byte $4C
+ ldy #14
jsr SearchTrack
!byte $78,$20,$00,$D7,$C9,$4D,$F0,$06
!byte $20,$67,$67,$20,$AA,$BF
bcs +
inx
inx
inx
inx
inx
ldy #1
jsr modify
!byte $00
+ ldy #12
jsr SearchTrack
!byte $20,$3E,$91,$20,$F3,$76,$20,$00
!byte $61,$4C,$94,$69
bcs +
inx
inx
inx
inx
inx
inx
ldy #1
jsr modify
!byte $2C
.dostitles
ldy #23
jsr SearchTrack
!byte $09, $7A ;ldi #$00
!byte $06, $7E, $A3 ;sta $0ee2
!byte $08, $4D, $A1 ;jsra $0cd1
!byte $08, $4D, $A1 ;jsra $0cd1
!byte $08, $4D, $A1 ;jsra $0cd1
!byte $08, $4D, $A1 ;jsra $0cd1
!byte $07, $74, $6D ;lda $c0e8
!byte $07, $7E, $A3 ;lda $0ee2
bcs +
pha
txa
adc #21
tax
pla
ldy #1
jsr modify
!byte $7F
+ ldy #13
jsr SearchTrack
!byte $A2,$04,$20,$4F,$1E,$20,$00,$A6
!byte $A5,$48,$D0,$01,$60
bcs +
pha
txa
adc #11
tax
pla
ldy #1
jsr modify
!byte $00
+
.exit
}

12
src/strings/en.a
View File

@ -84,7 +84,9 @@ s_specdel = $41
s_bytrack = $42
s_a5count = $43
s_restart = $44
STRINGCOUNT = $45
s_eab0 = $45
s_eatrk6 = $46
STRINGCOUNT = $47
!zone {
StringTable
@ -157,6 +159,8 @@ StringTable
!word .bytrack
!word .a5count
!word .restart
!word .eaboot0
!word .eatrk6
;
; Text can contain substitution strings, which
; are replaced by current values at runtime. Each
@ -182,7 +186,7 @@ StringTable
; can be set directly before calling PrintByID.
;
.header
!text "Passport by 4am 2017-01-27",00
!text "Passport by 4am 2017-01-30",00
.mainmenu
!text "________________________________________",$8D,$8D,$8D,$8D,$8D,$8D,$8D
!text " "
@ -405,4 +409,8 @@ StringTable
!text "T%t,S%0 Found A5 nibble count",$8D,$00
.restart
!text "Restarting scan",$8D,$00
.eaboot0
!text "T00 Found Electronic Arts bootloader",$8D,00
.eatrk6
!text "T06 Found EA protection track",$8D,00
}