Metal Gear Solid 5 cassette tape

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By Manuel

Ascended (18082)

Manuel's picture

30-03-2014, 18:07

If you download the original OGG file and convert it back to wav (I used 'oggdec'), I get a WAV file that I can load with openMSX.

By Meits

Scribe (6434)

Meits's picture

30-03-2014, 18:14

And what is it?

By Grauw

Ascended (10010)

Grauw's picture

30-03-2014, 18:37

@Manuel I tried that, but it ends just like previously described, with “Found:VOL2” and then nothing. Do you get something else?

By Manuel

Ascended (18082)

Manuel's picture

30-03-2014, 19:07

I was trying to give the explanation on how to get the VOL2 thing. Smile No news, sorry Smile

By Guillian

Prophet (3447)

Guillian's picture

30-03-2014, 19:34

I'm afraid it is not a BASIC program. It just has the CLOAD header and VOL2 name, but that's all.
The content seems binary data, perhaps dummy Z80 code.
This is what I got:

	db	#d3,#d3,#d3,#d3,#d3,#d3,#d3,#d3,#d3,#d3,#56,#4f,#4c,#32,#0,#0,#0,#0,#8e
	db	#0,#45,#84,#2,#0,#8e,#1e,#32,#2,#84,#32,#de,#84,#3e,#c3,#32,#d8,#d9,#ff
	db	#c3,#38,#84,#f1,#3e,#7,#33,#ae,#84,#21,#42,#84,#c3,#49,#75,#3,#0,#99,#31
	db	#87,#ce,#0,#71,#38,#59,#d2,#31,#31,#4e,#6e,#d2,#31,#3a,#8,#7d,#84,#1e
	db	#0,#41,#34,#0,#a3,#84,#28,#0,#74,#97,#3a,#d9,#44,#ca,#31,#9,#44,#ca,#32
	db	#cd,#7c,#1e,#e,#9b,#28,#58,#43,#0,#ce,#fc,#fc,#2e,#e4,#28,#41,#44,#ca,#8d
	db	#ca,#46,#0,#9a,#c7,#34,#30,#0,#ec,#9d,#cb,#28,#58,#2c,#59,#37,#3a,#88
	db	#36,#30,#40,#5a,#0,#8a,#4c,#e,#e,#1f,#85,#64,#fc,#2e,#44,#29,#e3,#28,#41
	db	#44,#ca,#31,#27,#e3,#28,#41,#44,#4e,#5e,#44,#d2,#33,#0,#3f,#61,#ca,#59
	db	#ca,#46,#83,#a7,#59,#ca,#46,#51,#3a,#5f,#9e,#e,#31,#f3,#df,#28,#26,#48,#8
	db	#4,#97,#3a,#9e,#28,#58,#bc,#a7,#e,#39,#30,#0,#86,#85,#97,#3a,#43,#d2,#e3
	db	#28,#26,#48,#44,#ba,#4e,#2e,#44,#d2,#39,#33,#30,#0,#a7,#4e,#22,#22,#3a
	db	#4c,#d2,#30,#48,#31,#30,#35,#7c,#fb,#e,#5d,#4e,#2e,#9d,#ee,#0,#c6,#e5,#3a
	db	#a1,#58,#2c,#59,#3a,#9a,#20,#32,#3a,#95,#22,#3e,#22,#3b

#D3 x 10 = CLOAD header
#56,#4f,#4c,#32,#0,#0 = VOL2 name

By Manuel

Ascended (18082)

Manuel's picture

30-03-2014, 20:49

How did you get the bytes? Manually decode the signal? Smile

By Guillian

Prophet (3447)

Guillian's picture

30-03-2014, 22:36

Yes, I calculated the frequency, then decoded all the bits and then converted to bytes checking the start and stop bits.
Perhaps some bits are not correct because the original file used in the game is not good enough.

By anonymous

incognito ergo sum (116)

anonymous's picture

31-03-2014, 11:22

So maybe the developers just selected a header to sound like an MSX and then they put some random data. However, what is interesting is the name "VOL2". So, is there any chance that a "VOL1" is somewhere else in MGS5?

By o.geerdink

Hero (582)

o.geerdink's picture

31-03-2014, 13:35

Sounds logical, it's very short to be a real program though

By Metalion

Paragon (1425)

Metalion's picture

31-03-2014, 13:42

Dummy Z80 opcode, indeed ...

ld      (8402h),a
ld      (84deh),a
ld      a,c3h
ld      (d9d8h),a
rst     38h
jp      8438h
pop     af
...
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