68000 motorola

[alex68]

You can reach up to 42 MHz without breaking?

[eXeler0]

Originally Posted by alex68

You can reach up to 42 MHz without breaking?

Until I see some more proof I'll treat that one as an urban legend :-)
I don't think the official Motorola HCMOS parts officially went beyond 20MHz and Supra 28 being an 8Mhz overclock.
Whilr 42MHz maybe was achievable under special circumstances, it seems a bit too high for a commercial product with any kind of warranty...

[alex68]

Hello What is the greatest proof that you have seen in mhz?

[FOL]

Originally Posted by alex68

Perhaps the 68000 reaches 50 MHz? Which was the maximum reached overclocked MHz range?

Minimig 68k can clock at 50MHz without getting hot.

[eXeler0]

Originally Posted by alex68

Hello What is the greatest proof that you have seen in mhz?

I can't say I can remember any 68k part being sold beyond 20MHz rating but obviously there was the 28MHz Supra.
The 36, 40Mhz rumours are AFAIK people overclocking their Supra, not official products...

The MINIMIG uses a 68SEC000 officially not sold above 10MHz I think and some say it's not 100% compatible with a MC68000. However, since this is a newer 3.3V part it's possible there are significantly overclocked parts out there...

[alex68]

Hi is as possible that the working 68000 50 MHz, if the serial 68060 50 mhz will ??

[eXeler0]

Originally Posted by alex68

Hi is as possible that the working 68000 50 MHz, if the serial 68060 50 mhz will ??

Not sure I understand what you are asking here...
A 68060 is not a serial number, it's a product designation - a completely new processor that is based on the 68k architecture although vastly more advanced.
Several members of the 68k "family" were officially sold at 50MHz, most common = 68030 and 68060.

[alex68]

I mean that if the 68000 reaches 50 MHz is very close to the 68060 if I remember correctly this micro reached 66 mhz, why I believe that the 68000 can not reach 50 mhz I guess not happen 24 mhz.

[eXeler0]

Originally Posted by alex68

I mean that if the 68000 reaches 50 MHz is very close to the 68060 if I remember correctly this micro reached 66 mhz, why I believe that the 68000 can not reach 50 mhz I guess not happen 24 mhz.

There is a lot more to CPU performance than Megahertz ;-)

Go to Wikipedia and read up on the difference between 16 bit vs 32 bit, pipeline length vs frequency, superscalar architecture of the 060 meaning it could execute 2 instructions in parallel. .. use of data and instruction caches etc..

Even 50MHz 030 (which is 32 bit) is nowhere near a 50MHz 060.

The 68000 was manufactured in a large number of different versions and for many years because it was a popular choice for many manufacturers. It is not impossible to imagine a 50MHz 68000 but the performance would not be close to 060 at all..

[alex68]

Originally Posted by eXeler0

There is a lot more to CPU performance than Megahertz ;-)

Go to Wikipedia and read up on the difference between 16 bit vs 32 bit, pipeline length vs frequency, superscalar architecture of the 060 meaning it could execute 2 instructions in parallel. .. use of data and instruction caches etc..

Even 50MHz 030 (which is 32 bit) is nowhere near a 50MHz 060.

The 68000 was manufactured in a large number of different versions and for many years because it was a popular choice for many manufacturers. It is not impossible to imagine a 50MHz 68000 but the performance would not be close to 060 at all..

It is clear as the 68060 is purely 32-bit, and the 68000 16-bit to 32 bits works internally, I have seen on ebay micros 68000 standard 24 mhz so if you make a got here overclocking margin pretty big. The question is how many mips would have a 68,000-50 mhz? 5 mips?

Note: I do not know if this manufactured by Freescale

[Leffmann]

At 50 MHz it would be about 5 MIPS.

[alex68]

Then a 12 mhz is one mip or two?

[eXeler0]

Originally Posted by alex68

Then a 12 mhz is one mip or two?

MIPS scale fairly predictably with MHz in these cases. It's more complicated with real software.

Also, it's called MIPS even if it's just 1 ;-)
The "s" at the end tells you instructions are measured per "second". (M_illion I_nstructions P_er S_econd)

[alex68]

Originally Posted by Leffmann

At 50 MHz it would be about 5 MIPS.

10 mhz is one mip? 50mhz:5 mips

[alex68]

The MIPS processor are real or depends on many factors?

[alex68]

The more mhz more mips ?? Someone can explain me if so? Greetings

[gilgamesh]

MIPS is Millions Instructions Per Second. So if the CPU is not parallel in some way, its MIPS is simply the product of frequency times cycles per instruction (averaged).

[eXeler0]

some practical examples from SysInfo since I have a Blizzard Turbo Mem board in one of my 500s. It has a DIP switch to toggle the 68000 between 7 and 14MHz.

SysInfo reports:
0.74 MIPS @ 7MHz
1.48 MIPS @ 14MHz

so... it scales exactly to double MIPS when frequency is doubled.

[alex68]

http://www.giantbomb.com/neo-geo/3045-25/ neogeo system 68000 12 mhz 2.1 mips

[eXeler0]

Originally Posted by alex68

http://www.giantbomb.com/neo-geo/3045-25/ neogeo system 68000 12 mhz 2.1 mips

Wikipedia lists it @1.75 MIPS
https://en.m.wikipedia.org/wiki/Neo_Geo_(system)
Anyhow. . To get a proper comparison, one would preferably run the same benchmarking software on both platforms. Other factors such as speed of memory used could have some impact I think.. Also, one of these claims could simply be wrong. ;-)