S1 MP3 Player c "8-bit Z80 CPU core" — ZXNet «hardware.zx»

From Andreas Kaiser To All 25 January 2007

Hello, Ivan > I forgot over the years, either in Sega or in Dandy (more likely) > I saw the Z80 in a DIP package. In Sega, responsible for sound.

From Aprisobal To All 25 January 2007

Hello, All This may have already been discussed on the forum, but I couldn't find anything by searching. On the Wikipedia page about Zilog Z80 - http://en.wikipedia.org/wiki/Zilog_Z80 - I accidentally noticed in the section: > All the S1 MP3 Player type digital audio players use the Z80 > instruction set. I followed the link S1 MP3 Player and got to http://en.wikipedia.org/wiki/S1_MP3_Player. Bah! Yes, we have such a player the city is walking! And the specification states: > 8-bit Z80 CPU core with on-chip DSU (run at 24.576 MHz(TYP), up to 60 > MHz - software controlled) Why did the Chinese use a certain Z80-compatible chip that can still programmatically increase the frequency to 60 MHz? Figured it was the cheapest option?

From Vlad Semchenko To All 25 January 2007

Hello, Aprisobal Thanks for the interesting information!!!

From Vyacheslav Kalinin To All 25 January 2007

Hello, Aprisobal Apr> Why did the Chinese use a certain Z80-compatible chip, which is still Apr> can programmatically increase the frequency to 60 MHz? Figured out what it was Apr> cheapest option? Not without this, at worst it costs a couple of bucks. And this is far from the only player with the z80. For example, there is a player with internals from Sega Master Sistem (like a dandy), everything is there in one chip there is a sound and a z80 and a video controller. And the point, as I understand it, is not only in the cost of the processor itself, but also in cost/number of specialists who can work with it.

From Ivan Shishkin To All 25 January 2007

Hello new art I forgot over the years, either in Sega or in Dandy (more likely) I saw a Z80 in DIP package.

From deathsoft To All 26 January 2007

Hello, Ivan > I forgot over the years, either in Sega or in Dandy (more likely) > I saw the Z80 in a DIP package. The Z80 has a coprocessor for sound.

From Mike To All 26 January 2007

Hello, Ivan > I forgot over the years, either in Sega or in Dandy (more likely) > I saw the Z80 in a DIP package. Obviously in sega, he controls the sound there. In dandy the percentage was either 6501 or 6502, exactly I don't remember anymore.

From Grigory Alekseevich Sinitsky To All 26 January 2007

Hello, Mikka_A Mik> as in Komodore?!!?! :v2_jawdr; Yes; well... Mik> cannot be. Exactly 6501 or 6502. I even once had a dandy board assembled on DIPs and there were size Z-80 case, one of them was 6501 or 6502. I had it for 8-10 years back.

From Dmitry Malychev To All 27 January 2007

Hello, Mikka_A Mik> as in Komodore?!!?! oh well... Mik> cannot be. There's 6510 in the chest of drawers. But in the original NES/Famicom the memory was not quite there compatible clone 6502 with original glitches. ;) I don’t know about Dendy, they’re Chinese They could easily have shoved a normal 6502... and even into some separate batch, it will be done with them. :D Eight-bit Sega still had the Z80 as the main processor. But I’m not sure that such machines ever came to us...

From Dmitry Malychev To All 27 January 2007

Hello, falanger Mik> as in Komodore?!!?! oh well... Mik> cannot be. There's 6510 in the chest of drawers. But in the original NES/Famicom the memory was not quite there compatible clone 6502 with original glitches. ;) I don’t know about Dendy, they’re Chinese They could easily have shoved a normal 6502... and even into some separate batch, it will be done with them. :D Eight-bit Sega still had the Z80 as the main processor. But I’m not sure that such machines ever came to us...

From Alexander Zan To All 27 January 2007

Hello Lethargeek Let> But I’m not sure that such machines ever came to us... We got there, I even saw branded stands :v2_eek; (to that point 3DO was in full swing were on sale :D)