Author Topic: Chrono Trigger ROM on PSX CD!?!?  (Read 26045 times)

fuchisasquatch

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Chrono Trigger ROM on PSX CD!?!?
« on: 2004-08-14 11:20:07 »
Just about 2 minutes ago i was mucking around with all psx games and i put chrono trigger in the drive and opened it up and noticed the file "ROM.BIN" in the root directory. I thought "hmm rom..." so i copied the file onto my computer and ran an snes emulator..and..i opened the file and to my suprise i heard a tick tock fade in..and suddlenly a swinging
pendulum appeared on my screen.

This has now supprised the hell out of me..and im confused in how squaresoft did it. it has that base rom..but there are heaps of other files > sound files, gfx, fmvs..so do they even use that rom file in the actual game..or..if they have the rom and other data in a sort of hybrid engine thing..or what..

Sorry if this has been talked about before or is something that everyone already knows..but i dont..

BTW: the rom is in japanese and my copy is us..

---------------------------

ok..i have just put the game back in my psx and have noticed that the main game screen the one with the "active, wait" battle mode.. isnt the first screen

the psx version has another screen that allows you to load files from your memory card as well as an specials extra menu. this may mean that the game is infact loading from the rom.

the intro fmv does not appear directly in the game either so this may help support the fact that it is a rom...

the only thing i dont get is that if i run it on my psx..the game is in english and the rom still runs in japanese.

is it possible to have multiple languages in a rom file (i know genesis/md can)

oh and also that ticking pendulum does not appear in the psx version..maybe i pressed the controller buttons..so ill recheck..

--------------------

i was just looking on information about the psx remake of chrono cross and found this: (http://psx.ign.com/articles/132/132853p1.html)

Quote
Anyway, so what differences can you expect to see in the PlayStation version of Chrono Trigger? Not much, Square will be keeping this gem of a title pretty close to the original Super NES version. The only changes that we know of so far is the opening movie, which will now be hand drawn by Dragon Ball Z creator Akira Toriyama. Also, it's been said that some of the cutscenes will include additional hand-drawn movies as well. But other than that, Square plans to keep it pretty much the same... except it won't be on cartridge, it'll be on a CD.


-------------------------

more information:

i was at another site and found

Quote

More interesting among Chrono Trigger's additions is the extras mode. It gives you movie and sound tests, extensive information on the game's monsters and attacks, maps of dungeons and item locations, and an artwork viewer.


i used psicture to open the picture files

PSX CD LAYOUR

/bin/                        - Some bin files
/bin/rogo.tim            - SQUARESOFT LOGO (Used before game starts)
/bin/sqea.tim            - SQUARE EA LOGO (Used before game starts)
/crostr/                    - Full of FMVs
/data/lass.bin           - Contains a couple of images (may be for extras mode)
/data/monster.dat     - May be extras monster database
/data/submap.dat      - May be extras maps database
/game1/                   - Contains bin files (may be for menus and automated movement and extras mode, ect.)
/game2/                   - Same as above
/imai/                       - Full of images of dungeons, misc pictures, artwork ect. DEFINATELY for extras mode
/movie/                     - More FMVs
/snd/                         - instrument collection, BGM and SEs (Extras mode has a jukebox thing..so this could be used maybe for only this and not game music/se, and also out of main games menus + extras menu and automated scenes contain music/se's.)

SUSPICIOUS FILES:

FILE                                          IDEA
----------------                            -------------------------
KAZ_ROM.BIN                           Could be rom loading module (emu)
MC_READ.BIN                           Memory card read module
MC_SYSTM.BIN                          Memory card system module
MC_WRITE.BIN                          Memory card writing module

hmm and i would like two know these 2 things if anyone can answer:

1. Do any of you think that emulation can be paused to allow FMVs to play then to resume after the FMV is over?

2. Can SNES roms contain multiple languages? Or would it be possible to read a file containing all the speech/text data externally and overlaying the japanese font (just incase they cant support multiple languages)

and now what im going to do..which i really dont think will work..is replace the rom with another rom..hopefully it does work...but i really really doubt it will

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fa_pa

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Chrono Trigger ROM on PSX CD!?!?
« Reply #1 on: 2004-08-14 13:38:01 »
Quote
1. Do any of you think that emulation can be paused to allow FMVs to play then to resume after the FMV is over?

yup why not? i dont think that they used a normal emulator they written it sellf so it is possible they written such routines.

Quote
2. Can SNES roms contain multiple languages? Or would it be possible to read a file containing all the speech/text data externally and overlaying the japanese font (just incase they cant support multiple languages)

yep there are many multi language roms out there and as i said in 1. you the could have created such an engine.

Quote
and now what im going to do..which i really dont think will work..is replace the rom with another rom..hopefully it does work...but i really really doubt it will

good luck i dont think you will get it to work. i tried once to edit a psx iso didnt work cause i couldnt reconstruct the file sys

fuchisasquatch

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Chrono Trigger ROM on PSX CD!?!?
« Reply #2 on: 2004-08-14 13:58:55 »
hope all your answers are right

Quote
good luck i dont think you will get it to work. i tried once to edit a psx iso didnt work cause i couldnt reconstruct the file sys


and to the above what i was gonna do was like get a rom..rename it to ROM.BIN and replace it.

anyway ive been doing alot of work on the cd and i have mapped the file calls:

Note: it does not mean that the files are called in this exact order..but this was the order i found the files listed.

Quote

File Calls In Sequential Order:

SLUS_013.63
>>>>>>> GAME1\KAZ.BIN
>>>>>>>>>>>>>> IMAI\ADBC.TIM
>>>>>>>>>>>>>> IMAI\AGE.TIM
>>>>>>>>>>>>>> ROM.BIN
>>>>>>> GAME1\KOK.BIN
>>>>>>>>>>>>>> ROM.BIN
>>>>>>>>>>>>>> DATA\SUBMAP.DAT
>>>>>>>>>>>>>> BANKCO.BIN (doesn’t exist on cd unless archived)
>>>>>>>>>>>>>> GAME1\PLYRCHR.BIN
>>>>>>>>>>>>>> DATA\MONSTER.DAT
>>>>>>> IMAI\READ0.TIM (font image)
>>>>>>> GAME2\MOVIE.BIN
>>>>>>>>>>>>>> MOVIE\OP.STR
>>>>>>>>>>>>>> MOVIE\ESP1.STR
>>>>>>>>>>>>>> MOVIE\ESP2.STR
>>>>>>>>>>>>>> MOVIE\M1.STR
>>>>>>>>>>>>>> MOVIE\M2.STR
>>>>>>>>>>>>>> MOVIE\M3.STR
>>>>>>>>>>>>>> MOVIE\M4.STR
>>>>>>>>>>>>>> MOVIE\M5.STR
>>>>>>>>>>>>>> MOVIE\M6.STR
>>>>>>>>>>>>>> MOVIE\M7.STR
>>>>>>>>>>>>>> MOVIE\ENOSP1.STR
>>>>>>>>>>>>>> MOVIE\ENOSP2.STR
>>>>>>> BIN\INIT00.BIN
>>>>>>> GAME2\MINIGAME.BIN
>>>>>>>>>>>>>> IMAI\MARU.TIM
>>>>>>> GAME2\WARP.BIN
>>>>>>>>>>>>>> GAME2\BITMAP.BIN
>>>>>>> GAME2\MC_READ.BIN
>>>>>>>>>>>>>> IMAI\READ0.TIM (font image)
>>>>>>>>>>>>>> IMAI\MC_READ.TIM (battle mode ATB Screen)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\MC_WRITE.BIN
>>>>>>>>>>>>>> IMAI\WRIT0.TIM
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\OMAKE.BIN
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\ENDPICS.BIN (a pic of the group)
>>>>>>>>>>>>>> IMAI\ZAKO.TIM (monsters images)
>>>>>>>>>>>>>> IMAI\BOSSX.TIM (boss images)
>>>>>>>>>>>>>> IMAI\TECPICG.BIN (tech moves)
>>>>>>>>>>>>>> IMAI\PICCHARA.BIN (chrono picture)
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\MAP_TIM.BIN (map images)
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\MC_READ.TIM (battle mode ATB Screen)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\MC_SYSTM.BIN
>>>>>>>>>>>>>> IMAI\SYST0.TIM (font image)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> BIN\INIT01.BIN
>>>>>>> GAME1\MENU.BIN
>>>>>>>>>>>>>> IMAI\8X8E.TIM (font image)
>>>>>>>>>>>>>> IMAI\LIGHT4.TIM (weird image)
>>>>>>>>>>>>>> IMAI\TECH.TIM
>>>>>>>>>>>>>> ROM.BIN
>>>>>>> GAME2\STAFF.BIN
>>>>>>> VRAMBIN.BIN
>>>>>>> BIN\SQEA.TIM (square electronic arts logo)
>>>>>>> BIN\ROGO.TIM
>>>>>>> GAME1\MENU.BIN
>>>>>>>>>>>>>> IMAI\8X8E.TIM (font image)
>>>>>>>>>>>>>> IMAI\LIGHT4.TIM (weird image)
>>>>>>>>>>>>>> IMAI\TECH.TIM
>>>>>>>>>>>>>> ROM.BIN
>>>>>>> GAME1\KOK.BIN
>>>>>>>>>>>>>> ROM.BIN
>>>>>>>>>>>>>> DATA\SUBMAP.DAT
>>>>>>>>>>>>>> BANKCO.BIN (doesn’t exist on cd unless archived)
>>>>>>>>>>>>>> GAME1\PLYRCHR.BIN
>>>>>>>>>>>>>> DATA\MONSTER.DAT
>>>>>>> GAME1\BTL.BIN
>>>>>>>>>>>>>> IMAI\MISS.TIM
>>>>>>>>>>>>>> IMAI\WRIT0.TIM
>>>>>>> IMAI\WRIT0.TIM
>>>>>>> IMAI\READ0.TIM (font image)
>>>>>>> GAME1\KAZ.BIN
>>>>>>>>>>>>>> IMAI\ADBC.TIM
>>>>>>>>>>>>>> IMAI\AGE.TIM
>>>>>>>>>>>>>> ROM.BIN
>>>>>>> GAME2\MOVIE.BIN
>>>>>>>>>>>>>> MOVIE\OP.STR
>>>>>>>>>>>>>> MOVIE\ESP1.STR
>>>>>>>>>>>>>> MOVIE\ESP2.STR
>>>>>>>>>>>>>> MOVIE\M1.STR
>>>>>>>>>>>>>> MOVIE\M2.STR
>>>>>>>>>>>>>> MOVIE\M3.STR
>>>>>>>>>>>>>> MOVIE\M4.STR
>>>>>>>>>>>>>> MOVIE\M5.STR
>>>>>>>>>>>>>> MOVIE\M6.STR
>>>>>>>>>>>>>> MOVIE\M7.STR
>>>>>>>>>>>>>> MOVIE\ENOSP1.STR
>>>>>>>>>>>>>> MOVIE\ENOSP2.STR
>>>>>>> GAME2\MC_WRITE.BIN
>>>>>>>>>>>>>> IMAI\WRIT0.TIM
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\MC_READ.BIN
>>>>>>>>>>>>>> IMAI\READ0.TIM (font image)
>>>>>>>>>>>>>> IMAI\MC_READ.TIM (battle mode ATB Screen)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\OMAKE.BIN
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\ENDPICS.BIN (a pic of the group)
>>>>>>>>>>>>>> IMAI\ZAKO.TIM (monsters images)
>>>>>>>>>>>>>> IMAI\BOSSX.TIM (boss images)
>>>>>>>>>>>>>> IMAI\TECPICG.BIN (tech moves)
>>>>>>>>>>>>>> IMAI\PICCHARA.BIN (chrono picture)
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\MAP_TIM.BIN (map images)
>>>>>>>>>>>>>> IMAI\OMK_MES.TIM (font image)
>>>>>>>>>>>>>> IMAI\MC_READ.TIM (battle mode ATB Screen)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> GAME2\SYSDEMO.BIN
>>>>>>>>>>>>>> IMAI\CH_DEMO.TIM (automated system file instruction images)
>>>>>>>>>>>>>> IMAI\DEMO0.TIM (font image)
>>>>>>>>>>>>>> IMAI\F8_WIN.TIM (font and other crap image)
>>>>>>> SND\CROBGM.BIN
>>>>>>> SND\OMKBGM.BIN
>>>>>>> SND\CROSSE.BIN
>>>>>>> SND\CTSE.SH
>>>>>>> SND\CHRONO.VB


as you can see..there are numerous calls to the file "ROM.BIN" so it is definately used..and what use other than it being a rom (which was proved) could it serve?[/quote]

fa_pa

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Chrono Trigger ROM on PSX CD!?!?
« Reply #3 on: 2004-08-14 14:14:15 »
Quote from: fuchisasquatch
hope all your answers are right
and to the above what i was gonna do was like get a rom..rename it to ROM.BIN and replace it.


i tried to make a hires patch for the psx version and its just to replace the cloud modelfile but i didn't get it to work   :(

fuchisasquatch

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Chrono Trigger ROM on PSX CD!?!?
« Reply #4 on: 2004-08-14 14:23:38 »
Oh ok..damn

hmm the reason why im so obsessed with this is because i think its very weird for as well isnt emulation illegal (correct me if im wrong) and i know for sure ROMS are but i guess squaresoft can make rom images..cuz they own the copyrights to chrono trigger. but they still made an emulator and they dont own the copyrights to nintendo.

unless the emulator is only for the chrono trigger game. but arent they still emulating nintendo hardware anyway.

and also i just think its stupid that squaresoft can put a friggen snes rom on a disc along with some "bonus features" and sell it for however much it costs. here in aus chrono trigger wasnt released..unless its in that uh double package thing. cuz all of a sudden EB got all these ff remakes: ff6, ff5 i think anthology, ff1 and also ff2 so yeah. but i didnt see chrono trigger there.

fa_pa

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Chrono Trigger ROM on PSX CD!?!?
« Reply #5 on: 2004-08-14 14:43:41 »
Quote from: fuchisasquatch
Oh ok..damn
hmm the reason why im so obsessed with this is because i think its very weird for as well isnt emulation illegal (correct me if im wrong) and i know for sure ROMS are but i guess squaresoft can make rom images..cuz they own the copyrights to chrono trigger. but they still made an emulator and they dont own the copyrights to nintendo.
Quote

no emulation is not illegal if you have the hardware and the games you emulate (its a kind of gray zone) but i dont think that it is an emulator that emulates more games. i think the engine uses the rom as resource file and does not realy emulates it.

Quote

and also i just think its stupid that squaresoft can put a friggen snes rom on a disc along with some "bonus features" and sell it for however much it costs. here in aus chrono trigger wasnt released..unless its in that uh double package thing. cuz all of a sudden EB got all these ff remakes: ff6, ff5 i think anthology, ff1 and also ff2 so yeah. but i didnt see chrono trigger there.

thats the same with dvds they put some "bonus features" to the disc that no one needs the trailer of a movie or something like that

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Chrono Trigger ROM on PSX CD!?!?
« Reply #6 on: 2004-08-14 14:54:36 »
Quote
no emulation is not illegal if you have the hardware and the games you emulate (its a kind of gray zone) but i dont think that it is an emulator that emulates more games. i think the engine uses the rom as resource file and does not realy emulates it.


hmm i was thinking of something along the lines of that..but then i thought thatd be kinda stupid..because

1. they would probably have access to all the raw data that they used when creating the snes game as they have some images and stuff in the IMAI folder such as a chrono trigger sprite that is used in the automation of the system file info screen. so why make it hard on themselves and create re-write a whole new engine PLUS create a program to read the data in the rom image. with the rom all they would need is an emu..and a very small and simple game engine.

2. it would be just as easy to create an emulator rather than an engine that reads for data located in the rom image.

NeoS

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Chrono Trigger ROM on PSX CD!?!?
« Reply #7 on: 2004-08-14 15:06:14 »
So, correct me if i'm wrong, can the FF anthology and Chronicles etc. be a rom too? I haven't tried reading the CT psx version on my pc yet, but if that's the case, Square "was" definitely catching a lotta dough for an old rom brushed up with not too much work. Clever! :)

fa_pa

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Chrono Trigger ROM on PSX CD!?!?
« Reply #8 on: 2004-08-14 15:09:58 »
wait a moment i have the antology i will have a look

ok i looked at them and they are complete different

it looks like that
Code: [Select]

15.01.2003  05:58        69.349.376 DATA.BIN
27.11.1998  16:44         1.048.576 DATA2.BIN
09.08.2002  14:21        55.827.116 OPENING.STR
15.01.2003  06:00           643.072 SLES_140.34
18.11.2002  11:45                68 SYSTEM.CNF

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Chrono Trigger ROM on PSX CD!?!?
« Reply #9 on: 2004-08-14 15:16:58 »
i checked ff6 before but im not sure about the others: ff1,2,5 ect.

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Chrono Trigger ROM on PSX CD!?!?
« Reply #10 on: 2004-08-14 16:04:45 »
what? is that for chrono trigger or ffvi?

or are they on a single disc and its like that..?

fa_pa

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Chrono Trigger ROM on PSX CD!?!?
« Reply #11 on: 2004-08-14 16:13:13 »
that was ff1 from the Ff origins collection

and that is ff2 from the same collection it seems that they had different teams for each cd

Code: [Select]
03.02.2003  07:54            33.832 ART.PAK
13.02.2002  10:14        15.138.817 ART_DAT.PAK
03.02.2003  07:54           248.361 BATTLE.PAK
21.01.2002  03:31         1.333.249 BG.PAK
26.07.2002  07:46        15.101.953 BGM.DAT
03.02.2003  07:54            48.039 CAMP.PAK
20.04.2002  06:30        12.189.697 EFFECT.DAT
03.02.2003  07:54           160.791 ENDING.PAK
28.03.2002  11:32           811.009 EVENT.GRP
03.02.2003  07:54            27.190 EVENT.PAK
27.11.1998  16:44         1.048.576 F.BIN
18.03.2002  11:59         1.474.561 IMAGE.DAT
18.02.2002  14:08        13.049.857 MAP.DAT
03.02.2003  07:54           276.750 MAP.PAK
15.02.2002  06:44            66.029 MINI.PAK
27.12.2001  03:07           786.433 MS.PAK
03.02.2003  07:54             2.164 MUSIC.PAK
03.02.2003  07:54             7.929 NEWGAME.PAK
28.01.2002  14:20            50.208 NPC.PAK
03.02.2003  07:54            12.807 OMAKE.PAK
23.01.2002  09:56           444.417 OMAKE_BG.PAK
03.02.2003  07:54           130.368 OPENING.PAK
25.02.2002  09:16        41.171.804 OPENING.STR
03.02.2003  07:54             6.456 PHOTO.PAK
03.02.2003  07:54            28.752 PUZZLE.PAK
03.02.2003  07:54             9.583 SAVE.PAK
30.03.2002  06:44           391.845 SE.DAT
03.02.2003  07:54            11.131 SHOP.PAK
03.02.2003  07:54           477.185 SLES_040.34
03.02.2003  07:54             3.376 SOUND.PAK
03.02.2003  08:30                60 SYSTEM.CNF

fuchisasquatch

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Chrono Trigger ROM on PSX CD!?!?
« Reply #12 on: 2004-08-14 16:21:12 »
oh ok..

wow there both really small (in filesize) they should have packed them both with more "bonus features"

and yeah im at the square-enix site im signing up for an account so i can ask them on live support why the chrono trigger game has a rom in it..hehe

oh and i havent been able to try put another rom in the game..i cant find any BIN snes roms all of them are SMC and dont match up with that multiple of 2048 thing so they wont work.

so if anyone has any RAW snes roms PD is just fine please uh..hmm if you could post a link or add to aim, icq or msn and send to me...

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Chrono Trigger ROM on PSX CD!?!?
« Reply #13 on: 2004-08-14 17:52:44 »
The rom in the PSX cd is just a very unique way to hold game data, it's *NEVER* executed.

The Chono Trigger CD does not not contain an emulator, nor is the rom emulated.

Square write a whole new kernel for CT and simply opens the rom to grab the game data, like maps, enemy data, and scripts  but doen't execute the rom itself.

If you look in the FF6 PSX CD and do a compare with the SNES rom you will find that that CD contains the rom too, but in FF6's case, the rom has been "shattered" and split up into individual data sets. The the executable data has been stripped.

The CT rom was actually there as a "secret bonus"  for the Japanese market. It was put there on puropse.

However, the US version of Chono Trigger has an exclusive distrobution contract with Nintendo. If you run US CT ROM in an SNES emulator it says "Licenced to Nintendo" in the US version. Because Nintendo has the rights, Square coudn't release the english version of the rom in the US.

Well, why a ROM as a data set?

Well, The sound chip in the PSX is actully *COMAPATIBLE* with the SNES one. Sony made them both and one is just a big brother of the other, so the sound data can be directly "ripped" from the rom. (That's why the PSX and SNES version sound exactly the same) Not only that, Minoru Akao, the sound designer, was one of the original R&D guys who came up with Sony's sound system for the SNES. He was then hired by Square and not only did the original sound design for the Chono Trigger ROM, but also did the remake. He knows the system foreward and backwards. Not only that he's the sound designer for 98% of all Squaresoft games.

The PSX also uses the same high color colordepth format for displaying game sprites. That doesn't hurt either. However the display code is *WAY* different.

Swapping the rom will break the game. It won't work. It's not an emulator.

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Chrono Trigger ROM on PSX CD!?!?
« Reply #14 on: 2004-08-14 17:56:55 »
Ok... let me ask why are there numerous calls to that file throughout the game and if its not used in the US version because of that thing you said before why does it matter if the file is swapped or whatever?

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Chrono Trigger ROM on PSX CD!?!?
« Reply #15 on: 2004-08-14 18:06:13 »
It *IS* used in the US version. It still "ripps" the grapahics, sound, enemy data, and such in real time. They are exactly the same.

However the US version ROM is different than the Japanese one.

Due to the changes in the dialog script, the english dialog script is external to the rom now. (Actually is just a chunk of the US SNES ROM, and the location exacpes me for the moment) The kenerl calls that as opposed to the original data inside the whole Japanese rom.

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Chrono Trigger ROM on PSX CD!?!?
« Reply #16 on: 2004-08-14 18:13:49 »
Alright

That seems like a really stupid thing to do. They had access to all the raw data (as i found sprites/gfx/bgm/se on the disc for the bonus crap) why didnt they just put all that data on the disc normally instead of taking it out of the rom

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Chrono Trigger ROM on PSX CD!?!?
« Reply #17 on: 2004-08-14 19:05:03 »
Because, believe it or not, the ROM way was was *MUCH* easier. It was already in a documented format and everyone on the dev team knew where it all was. (Unlike us, Square has access the all the source documents to thier software.) There isn't any guess work, they know what bank hold the characters and what section is the AI script. They also have the oringinal code so the know exactly how it works.

Why make more work for yourself when all you have to do is recode half the game?

fuchisasquatch

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Chrono Trigger ROM on PSX CD!?!?
« Reply #18 on: 2004-08-14 19:32:32 »
friggen square...

i still feel ripped off

halkun

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Chrono Trigger ROM on PSX CD!?!?
« Reply #19 on: 2004-08-14 19:45:14 »
Just remeber, it was a re-release, not a remake. Like when old movies get released in DVD. You don't expect "casablanca" to be in full color with THX sound, do you? Same thing ^_^

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Chrono Trigger ROM on PSX CD!?!?
« Reply #20 on: 2004-08-14 20:07:45 »
well i wouldnt even buy casablanca anyway.. :P

sfx1999

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Chrono Trigger ROM on PSX CD!?!?
« Reply #21 on: 2004-08-15 15:06:20 »
The reason that sound chip is compatible would probably have to do with when Sony planned to make the original Playstation with a cartridge slot on the back for SNES games. The reason they did so well with the PSX is because they had experience with Nintendo working on the SNES's CD periperal(sp?). They were going to screw Nintendo.

halkun

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Chrono Trigger ROM on PSX CD!?!?
« Reply #22 on: 2004-08-15 18:58:32 »
No, the SNES's SPC700 was simply a sound chip nintendo licenced from sony because nintendo didn't have the technology to create one themselves. The problem is it was very hard to program for and used different opcodes than the CPU. Sony was already using that sound chip in thier arcade boards.

Several revisions later, Sony plopped a more expansive sister chip into thier system 11 arcade boards with thier brand new 3D GPU. When the nintendo/sony fallout thing happened. They took the system 11, stripped it of some ram, plopped a cdrom on it, made the 4 port joystick chip bi-directional (so they could do input and output) and set them up so you could write to external flash ram. Then they put it in a case, put a cherry on top, and called it a playstation.

Here is a PSX factoid. The joystick/memory card ports in the front of a PSX are are all electricly the same thing. both the controller port and the memory card port have nine pins that carry the same data. You could, with an adapter, plug in a controller into the memory card slot and program a PSX to read the controller data from the memory card slot by simply switching the read address.

Sony was planning the PSX to be a four-port system, but because of speed issues with initalizing the ports and trying to figure out what was plugged into where, they changed the face molding  to only accept contollers in ports 1 and 2 and cards in ports 3 and 4. Then they "hardwired" the access in the BIOS. (You not allowed to directly access the hardware when you code for the PSX, everything through the BIOS)

sfx1999

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« Reply #23 on: 2004-08-15 19:24:00 »
Let me guess. If you don't use BIOS calls you cause a segmentation fault, don't you?

halkun

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Chrono Trigger ROM on PSX CD!?!?
« Reply #24 on: 2004-08-15 19:33:35 »
If you don't use the bios, your game won't be compatible with the 30 some-odd different PSOne, PS2, and PSX systems and you will be forever stuck on your current revision of the system.

Sony moves thier hardware around inside all the time.