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| TurboR PCB prototype with V9990?
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Ivan
msx professional
Berichten: 907 |  Geplaatst: 02 Juli 2006, 11:59 |
Take a look: link
I see one cartridge slot. |
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BodyHammeR
msx addict
Berichten: 488 | Geplaatst: 02 Juli 2006, 12:08 |
O_o That might be one of those v9990 evaluation boards, how cool is that?
(Also pointless if you have a GFX9000, but I think collectors will go into drool-mode over this one  ) |
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karloch
msx addict
Berichten: 417 | Geplaatst: 02 Juli 2006, 12:20 |
Woah, is that the famous PCB of the MSX3 prototype? According to seller description, there is not R800 on the board, just V9990, Z80 CPU and I/O.
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Ivan
msx professional
Berichten: 907 | Geplaatst: 02 Juli 2006, 12:21 |
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flyguille
msx master
Berichten: 1223 | Geplaatst: 02 Juli 2006, 20:42 |
WOWWWW!!
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PingPong
msx professional
Berichten: 1023 | Geplaatst: 02 Juli 2006, 21:45 |
In the photo i cannot see any v99x8 on board, how they assure msx2 compatibility at HW level?
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karloch
msx addict
Berichten: 417 | Geplaatst: 02 Juli 2006, 22:57 |
Quote:
| In the photo i cannot see any v99x8 on board, how they assure msx2 compatibility at HW level?
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Rumours said that Panasonic never achieved that, it was not economically viable. With that failed attempt, Panasonic left the standard and officially MSX became comercially dead. |
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 01:44 |
No!, this PCB hasn't a spare socket for z80!...note that the socket is 14x2DIL so, it is for ROM.
surely it must be controlled by mean of that bus. OR
what chip is that other surface chip near of the brown connector? a msx engine maybe????
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 01:50 |
the other surface chips hasn't enought pins as for be a msx engine, maybe it is a logical jungle.
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 02:29 |
well, the other surface chip has 44pins, not enought for z80 or msx engine what hell is that chip!!
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 03:45 |
I needs pictures with more resolution!!!!
but with that i can see, the bus connector, has the pin 10 grounded, and it is BUSDIR!!!! .... shit seems that it is not a MSX bus connector.
but anyway i needs picture with more resolution to do a correct analisys
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 03:47 |
please, some japanese asks to the seller to take closer pictures!!!!!!! over all the board.....
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mohai
msx lover
Berichten: 127 | Geplaatst: 03 Juli 2006, 16:41 |
I think it is the evaluation board that Yamaha built. The 50-pin connector is not suitable (directly) for MSX. Instead of this, included in the pack there was an adaptor to connect to MSX and another one for IBM-PC. All this is explained in the manual. The empty socket it is for some kind of BIOS you could develop. If you look at the board, you could hardly read "27C256", that means 32KB.
Maybe Panasonic did not build any prototype anyway...  |
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mohai
msx lover
Berichten: 127 | Geplaatst: 03 Juli 2006, 16:42 |
I forgot to mention that there were adaptors for IBM PC, MSX and PC 88
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flyguille
msx master
Berichten: 1223 | Geplaatst: 03 Juli 2006, 18:06 |
and the other surface chip and the brown connector near of it?
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