Turbo 7 MHz is coming again

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By Repair-Bas

Paragon (1089)

Repair-Bas's picture

08-04-2007, 12:12

I found some parts to built 7 MHz prints.
So I hope in a few months to have aprox 20 prints.

I'll let you know when I have information

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By mouser

Expert (90)

mouser's picture

06-05-2007, 23:35

What is this Turbo 7 mhz ? A kit to double the clock frequency or an expansion board containing a different processor ? Excuse me if this is a trivial question, but I am not very familiar with the upgrades an expansions post 1990.

By nikodr

Paladin (744)

nikodr's picture

07-05-2007, 00:56

is it possible to upgrade an msx2+ to a turbo r model?I am thinking of upgrading my msx2 to a msx2+ model change all needed stuff and the chipset v9938 to v9958 but i think i would like it if my msx could be turbo r too ,is it possible to fit a r800 to an ordinary msx2+ ?

By [D-Tail]

Ascended (8241)

[D-Tail]'s picture

07-05-2007, 01:07

Hehe, wouldn't that be nice? But no, to my knowledge, you'd still miss some important parts; the S1990 (with the Z80 built-in), different memory structure, so I suggest you'd go for some eBay auction Wink

By Etaoin

Rookie (32)

Etaoin's picture

07-05-2007, 07:51

What is this Turbo 7 mhz ? A kit to double the clock frequency or an expansion board containing a different processor ? Excuse me if this is a trivial question, but I am not very familiar with the upgrades an expansions post 1990.

I have schematics of a 6 MHz board that are from 1989, so that should be old enough for you to be familiar with Wink It's probably similar to that. My guess is that 6 MHz was as fast as any Z80B would go in 1989.

By the way, that only contains three easily obtainable 74LSxx chips that shouldn't take months to source ($0.84 for the three from Futurlec).

By msd

Paragon (1407)

msd's picture

07-05-2007, 09:35

@D-tail: The s1990 doesn't have a build in z80. That's in the T9769

By mohai

Paladin (910)

mohai's picture

09-05-2007, 15:17

I have schematics of a 6 MHz board that are from 1989, so that should be old enough for you to be familiar with Wink It's probably similar to that. My guess is that 6 MHz was as fast as any Z80B would go in 1989.

By the way, that only contains three easily obtainable 74LSxx chips that shouldn't take months to source ($0.84 for the three from Futurlec).

Could you post the schematics somewhere?

Maybe send them to Hansotten.

By Repair-Bas

Paragon (1089)

Repair-Bas's picture

28-01-2009, 12:19

Finally Turbo 7 MHz is avaible again.
Look at my webiste for more information

www.bas-ditta.info

By W76NearDark

Paladin (684)

W76NearDark's picture

28-01-2009, 13:00

Ah very nice! I just ordered one by e-mail Smile But I have another question... is it possible for you to build it into a Sony hb-f700p which is upgraded to a MSX2+?

By Repair-Bas

Paragon (1089)

Repair-Bas's picture

28-01-2009, 14:12

No problem together with the MSX2+ extension

By pitpan

Prophet (3134)

pitpan's picture

28-01-2009, 15:11

I've got about a hundred Z80B CPUs here. Anyone interested in the whole lot? I'd like to trade them instead of selling them. Anyone's welcome, but I'm not going to sell them one by one. It's all or nothing LOL!

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