New Z80B at 6 MHz

Página 2/3
1 | | 3

Por dhau

Paragon (1570)

Imagen del dhau

24-05-2004, 16:09

I am kind of looking interested at a new 8-bit computer from Russia:

http://www.eng.petersplus.ru/sprinter/

It runs Z80C at 21MHz :)

Por dhau

Paragon (1570)

Imagen del dhau

24-05-2004, 16:31

It is a very cool project to convert all good MSX games for this new computer. This will help it's sales to more customers.

Por Grauw

Ascended (10558)

Imagen del Grauw

24-05-2004, 16:52

*perfectly happy with his 7.14MHz Z80H Smile*

But, I must say, I really can't live without it anymore (especially when using DOS2, LHEXT, and some CPU intensive demo's/games such as Illusion City and GEM). So I'd recommend the upgrade to everyone.

Btw, I don't know if you can actually use a Z80B at 6MHz. It seems more likely, or at least more simple, that you have to use them at 5,36 MHz (like the Panasonic computers do), which is a 'multiplier' of 1.5... But, there is the Turbo circuit by (I believe, correct me if I'm wrong) Alwin Henseler, which can afaik change the speed on a smooth scale, so it should also be able to do 6MHz.

Another thing, in the past, many people in the Netherlands actually used Z80B's for 7MHz circuits by overclocking them. However it didn't work with all Z80B chips, only ones from certain series. You'll have to experiment to see whether the chips from this series can be overclocked well, and ofcourse I can't say anything about the lifespan when doing that (but I think it's ok, and you can always easily replace it if you put it in a socket).

Also, Pitpan, you say "In addition, MSX1 computers cannot handle Z80H maximum speed clock." Are you referring to 7.14MHz there or to 8MHz? Because in practice even though the Z80H's can reach 8MHz they're always used at 7.14... Also, maybe it differs per machine...?

~Grauw

Por Grauw

Ascended (10558)

Imagen del Grauw

24-05-2004, 16:54

It is a very cool project to convert all good MSX games for this new computer. This will help it's sales to more customers.
I'd rather have a one-chip-MSX, produced in a small professional casing Smile.

~Grauw

Por dhau

Paragon (1570)

Imagen del dhau

24-05-2004, 17:02

True, size of this baby sucks (full AT case), but then again, Sprinter 2000 is available for 4 years, and it's predecessor Sprinter 97 was around forever. And one-chip-msx is in "early development stage" forever as well Smile

Por msd

Paragon (1471)

Imagen del msd

24-05-2004, 18:12

I've looked it up. It is the t9769c. It is also used in the turbo r and sanyo msx2+ computers. This chip can run on higher freq then 3.54Mhz.

Por msd

Paragon (1471)

Imagen del msd

24-05-2004, 23:18

The msx faq is now updated. We have checked several pictures of 2+ computers and non of them have a z80b. They all have (sony 2+ is not checked yet) the same chip. There are 2 different versions t9769C (also used in Turbo R) and t9769b. This is also the "msx-engine" of the 2+

Por pitpan

Prophet (3152)

Imagen del pitpan

25-05-2004, 10:21

So, if PPI, PSG, memory mapper and CPU are included in the MSX-ENGINE, just add the VDP and some RAM and ROM and you will have a full one-chip MSX.

Por karloch

Prophet (2157)

Imagen del karloch

25-05-2004, 11:28

Yeah, MSX engine joins several MSX chips in one. I think that ASCII and Nishi were projecting a One-Chip MSX since those very early years...

Btw, as msd said, MSX FAQ is updated, no more references to Z80B in a Panasonic MSX 2+.

Por snout

Ascended (15184)

Imagen del snout

25-05-2004, 11:45

In Tilburg 2001 Nishi already admitted his goal for the MSX was to become a one-chip computer indeed. Wink

Página 2/3
1 | | 3