MSX2 Upgrade to Plus

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By giuseve

Paladin (744)

giuseve's picture

28-12-2013, 15:10

Hi,

in the 80's a friend of mine showed to me his SONY F900 MSX2 upgraded to MSX2+ with a cartridge.
He lost every MSX stuff.
Do somebody know if it still exist?
I remember that those CART adds V9958, MSX-Audio and RAM.
I think that it would be perfect for my VG-8235 with 720k drive in addiction to Megarom SCC SD.

Do you think that OCM would be less expensive? In that case I have a wonderful VG-8235 with 720k drive to make an exchange :-)

Regards

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By anonymous

incognito ergo sum (116)

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05-01-2014, 20:57

Never heard of that cartridge! In Spain MSX2+ upgrade kits were sold to convert some MSX2 computers from Sony and Philips to MSX2+ but they were not single cartridges (they were internal upgrades consisting in replacing the VDP and adding MSX2+ ROM chips).

By Ivan

Ascended (9298)

Ivan's picture

05-01-2014, 20:55

By the way, it is hard to get a One Chip MSX and they are expensive. Buy a real MSX2+ or TurboR instead.

By Manuel

Ascended (18133)

Manuel's picture

05-01-2014, 21:10

giuseve: that's odd, because for MSX2+ you don't need more RAM nor MSX-Audio...

By TheWhipMaster

Expert (120)

TheWhipMaster's picture

06-01-2014, 09:13

Are you refering to neos cartridge ? I thought only the 9958 and rom were in , and that only prototype exist ...
Any idea of the origin of the cartridge ?
I know that some 80colomun cartridge were modify in brazil but again no fm ...

By l_oliveira

Hero (531)

l_oliveira's picture

11-01-2014, 06:10

http://www.faq.msxnet.org/hardware.html#ACVS

"MSX2+ upgrade cartridge, with FM-PAC (only FM, no SRAM)"

I've seen one of these before, it contains a slot expander, the SUB ROM, the FM BIOS , YM2413 and V9958 with video encoder hardware (for RGB and composite). It still requires you to disable the internal VDP and replace the BIOS inside of the computer with the 2+ BIOS.

Basically it's not like the NEOS Version UP adapter which you just plug on a MSX1.

Since this existed here in Brazil it's possible other similar products also existed outside of the country.

By giuseve

Paladin (744)

giuseve's picture

11-01-2014, 11:39

Ivan wrote:

In Spain MSX2+ upgrade kits were sold to convert some MSX2 computers from Sony and Philips to MSX2+ but they were not single cartridges (they were internal upgrades consisting in replacing the VDP and adding MSX2+ ROM chips).

I've seen somewhere somethin like this.
I'm not so able with circuits, but I could consider it.
Do you have any idea where to find this kit and how much does it cost?
And have I to search a Electronic Engeener to do this upgrade :-) ?
Are MSX Audio included in the upgrade?

Regards

By Retrofan

Paragon (1262)

Retrofan's picture

11-01-2014, 11:43

Maybe this is something for you combined with this

By enribar

Paragon (1136)

enribar's picture

11-01-2014, 13:05

ciao giuseve, negli anni 90 c'erano almeno 3 club e singoli utenti italiani dell'MSX che facevano upgrade a MSX2+, secondo vari livelli. Uno di questi era Gilberto: http://gilbertomsx.altervista.org/

By giuseve

Paladin (744)

giuseve's picture

11-01-2014, 20:45

Manuel wrote:

giuseve: that's odd, because for MSX2+ you don't need more RAM nor MSX-Audio...

I'm in doubt about 2 features of MSX2+
- RAM: usually limited to 64K: the same ram of MSX1 after a lot of MSX2 born with 128K. Does it mean that some MSX2 software could not work on MSX2+ with only 64K
- VDP: usually it is NTSC @60hz. Shoud I set 50Hz everytime?
- AC Power. Usually they have 110V power supply.

I don't know how much would cost an european MSX2+ with 128K or 256K.

By giuseve

Paladin (744)

giuseve's picture

11-01-2014, 20:46

enribar wrote:

ciao giuseve, negli anni 90 c'erano almeno 3 club e singoli utenti italiani dell'MSX che facevano upgrade a MSX2+, secondo vari livelli. Uno di questi era Gilberto: http://gilbertomsx.altervista.org/

Contattato. Grazie per la dritta

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