Martin Michelsen
106 lines
2.6 KiB
ArmAsm
106 lines
2.6 KiB
ArmAsm
# This function returns the game version, with values more specific than can be detected by the sub_version field in
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# the various login commands (e.g. 9D/9E). We call this value specific_version in the codebase.
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# The returned value has the format SSGGRRVV, where:
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# S = 31 = PSOv1, 32 = PSOv2, 33 = PSOv3, 34 = Xbox, 35 = BB
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# G = game (4F (O) = non-Ep3, 53 (S) = Ep3)
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# R = region (45 (E), 4A (J), or 50 (P))
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# V = minor version (meaning varies by major version)
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# This results in a 4-character ASCII-printable version code which encodes all of the above information.
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entry_ptr:
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reloc0:
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.offsetof start
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.versions SH4
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start:
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mova r0, [data_start]
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mov r1, r0
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mov.l r2, [r1]+ # target value
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again:
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mov.l r0, [r1]+ # candidate address
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cmpeq r0, 0
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bt done # return 0 if no version matched
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mov.l r0, [r0] # value from candidate address
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cmpeq r0, r2
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mov.l r0, [r1]+ # specific_version from this match
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bf again
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nop
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done:
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rets
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nop
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.align 4
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data_start:
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.data 0x61657244
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.data 0x8C239D78 # v1 NTE
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.data 0x314F4A31 # 1OJ1
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.data 0x8C24CA24 # v1 11/2000
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.data 0x314F4A32 # 1OJ2
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.data 0x8C2873AC # v1 12/2000
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.data 0x314F4A33 # 1OJ3
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.data 0x8C28B04C # v1 01/2001
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.data 0x314F4A34 # 1OJ4
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.data 0x8C291E34 # v1 JP
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.data 0x314F4A46 # 1OJF
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.data 0x8C28B924 # v1 USA
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.data 0x314F4546 # 1OEF
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.data 0x8C28B3F4 # v1 EU
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.data 0x314F5046 # 1OPF
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.data 0x8C2F3748 # v2 08/06/2001 AND v2 08/22/2001 (TODO: Find a way to tell these apart)
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.data 0x324F4A35 # 2OJ5
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.data 0x8C2F11D0 # v2 JP
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.data 0x324F4A46 # 2OJF
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.data 0x8C2F3738 # v2 USA
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.data 0x324F4546 # 2OEF
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.data 0x8C2E7CE0 # v2 EU
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.data 0x324F5046 # 2OPF
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.data 0x00000000 # end sentinel
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.versions PPC
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start:
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lis r3, 0x8000
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lwz r4, [r3]
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# For Trial Editions, set the V field to 54; for other versions, set it to 0x30 | disc_version
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rlwinm r0, r4, 8, 24, 31
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cmplwi r0, 0x47 # Check if high byte of game ID is 'G'
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beq not_trial
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cmplwi r0, 0x44 # Check if high byte of game ID is 'D'
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beq is_nte
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li r3, 0
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blr
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is_nte:
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li r3, 0x0054
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b end_trial_check
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not_trial:
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lbz r3, [r3 + 7]
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ori r3, r3, 0x0030
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end_trial_check:
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oris r3, r3, 0x3300 # Set high byte ('3')
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rlwimi r3, r4, 8, 8, 23 # Set middle two bytes to last two bytes of game ID
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blr
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.versions X86
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start:
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.include GetVersionInfoXB
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test eax, eax
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jz version_not_found
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mov eax, [eax]
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ret
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version_not_found:
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mov eax, 0x344F0000
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ret
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