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AuthorTopic: 66mhz 060's  (Read 1695 times)

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Offline zx6r6

66mhz 060's
« on: August 14, 2005, 11:43:51 AM »
If I buy an XC68EC060RC66E is there a chance that it will have an FPU? or is it just 60mhz labelled parts that this applies too?
 

Offline countzero

Re: 66mhz 060's
« Reply #1 on: August 14, 2005, 11:51:13 AM »
I thought all 68060's had internal fpu, but according to cpu world, there seems to be none

http://www.cpu-world.com/CPUs/68060/Motorola-XC68EC060RC66E.html
I believe in mt. Fuji
 

Offline zx6r6

Re: 66mhz 060's
« Reply #2 on: August 14, 2005, 12:03:38 PM »
I know some were incorrectly labelled as EC when they shouldnt have been and DID have an FPU (I used to own one!). Cant remember whether it the 60 or 66mhz labelled ones though!
 

Offline lurkist

Re: 66mhz 060's
« Reply #3 on: August 14, 2005, 01:41:29 PM »
Mine's a 66 and it has an fpu.
A1200 Power Tower, Blizzard 1260 66 +32MB, OS3.9, 2.5\\" HD, IDEfix97 + DVD-RW + Zip, SD/FF + 15\\" CRT, Ioblix1200P + scanner, PCMCIA LAN + router
 

Offline MuLTiViEW

Re: 66mhz 060's
« Reply #4 on: August 15, 2005, 08:02:12 AM »
  Whenever you see "EC"  written on any 68020, 030, 040, or 060 it means that CPU has   NO MMU   and NO FPU

 68 EC 020    Has no cache  (also 24 bit data output as opposed to the 32 bit data output of a 68020)
 68 EC 030    Has no MMU

 Beyond this, ALL 68k's were planned to be engineered with FPUs. Of course.....


 68 EC 040  Has no MMU and no FPU

 68 LC 040  Has the MMU added, but no FPU

 68 RC 040  Is the final cookie. Has it all.


 68 EC 060  Like the 040, no MMU, no FPU

 68 LC 060  Has MMU, but no FPU



 I always go by my own personal definitions ;)

 EC = Economy  LC = low class,  RC = Royal Class.

 heheh

 You know,  I read an article lately that mentioned a weakness in some 060's reguarding the FPU.  Something to do with poor pipelining for the FPU circuitry.  
 A lot more "EC060's" were produced with the possible expectation other FPU options could be considered.

 Im currently thinking about making my own A3000 CPU card and have often thought of adding a 68882 to pick up the FPU operations.  
 But I was planning on using a simple "LC040" + the 882.
 Something like 40 mhz 040 and a 50mhz 68882.

 I thought about the same for an 060, but a couple things bothered me.

 1. Speed of the FPU should be equal or faster than the CPU.  Motorola's own recommendations.

 2. 68882 seems to be maxed out at 50mhz. Which so happens to be the minimum speed of the 060.  grrr

 yet another thing.

 3. Most of the 060's made, all the 50mhz versions seem to have the FPU, while more 66mhz versions and 75mhz versions DONT seem to have the FPU.     At least the "available" ones dont.

  I can see two possible solutions to this, but both would involve doing something no one else here but me would be willing to do.

 1. Remake your own 060 card, and use either a PPC's FPU, or a coldfire's internal FPU.

 or

 2. Remake the card, put a socket for a 68882 @50mhz in and try and find one of the latest revisions.   Overclock that thing to 75 mhz or even 100mhz.  Supposedly, and this is a BIG :D  SUPPOSEDLY,   they really did make 100mhz 882's and stamped them with "50"

 I read this years back about it,  but I don't believe it at all unless someone proves it.
 
 It's probably bogus,  but look at it this way.  If you do get that far.....  you can always buy more and overclock the crap out of them until they die.  
 Such a practice could cause a drought of 882's in the world and they'll be forced to make more faster ones right?

 All a part of my master plan.  Muhahah.

 So get ta overclocking them FPU's today!

 Ok that's the cold medicine talking.
  :-D

coming soon from Morrowind DVD
a movie starring:  dONKeY
 \\"Shadow of Corky the Guar\\"
 

Offline zx6r6

Re: 66mhz 060's
« Reply #5 on: August 15, 2005, 08:19:39 AM »
Thats good enough for me! I've just ordered 3, hopefully at least 1 will have an fpu! :)
 

Offline keropi

Re: 66mhz 060's
« Reply #6 on: August 15, 2005, 11:49:45 AM »
I have an 68EC060RC60 that has BOTH working FPU/MMU ...

Offline Doobrey

Re: 66mhz 060's
« Reply #7 on: August 15, 2005, 02:14:50 PM »
Quote

MuLTiViEW wrote:
 68 EC 020    Has no cache  (also 24 bit data output as opposed to the 32 bit data output of a 68020)
 


Nope, you're getting addressing/data mixed up..the ec020  has 24bit external addressing, it still has the full 32bit data bus.
On schedule, and suing
 

Offline Doobrey

Re: 66mhz 060's
« Reply #8 on: August 15, 2005, 02:52:28 PM »
Quote

MuLTiViEW wrote:

 1. Remake your own 060 card, and use either a PPC's FPU, or a coldfire's internal FPU.
  :-D


 The PPC doesn't understand 68k FPU opcodes, so you'd at least have to write some FPU emulation code for the PPC.If you're going that far, why not do away with the 060 completely and emulate it on the PPC?

Also, with the idea of using the coldfire as an FPU, how do you stop it from running the non-FPU instructions?
..and keeping the instruction/data caches in sync between the 2 cpus?. You could simply disable them, but then the card will be slower than the one you're trying to replace.
On schedule, and suing
 

Offline Zac67

Re: 66mhz 060's
« Reply #9 on: August 15, 2005, 09:38:41 PM »
Quote
MuLTiViEW wrote:
 Im currently thinking about making my own A3000 CPU card and have often thought of adding a 68882 to pick up the FPU operations.

Have you checked the copro interface of '040 and '060 if it's even possible to run an external FPU? The internal ones are usually much faster anyway, that's why they put them on-die.

Quote
Remake your own 060 card, and use either a PPC's FPU, or a coldfire's internal FPU.

This is as much crap as I can take on a Monday night - drink up guys and go home! ;-)
 

Offline Piru

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Re: 66mhz 060's
« Reply #10 on: August 15, 2005, 09:58:47 PM »
Quote
68 EC 020 Has no cache

68EC020 has exactly the same cache as full 68020.

The only difference is the address bus width (24bit for EC and max 16MB address space, 32bit for full 68020, max 4GB address space).

[As Doobrey pointed out already]
 

Offline delshay

Re: 66mhz 060's
« Reply #11 on: August 15, 2005, 11:19:17 PM »
OVERCLOCKING a 68060rc50 can go to 70mhz.. XC or MC type..

i found that a XC68060RC50 when overclocked @ 70MHZ with a 50ppm osc did not work..

changeing the osc from 50ppm to 10ppm worked fine..no problems at all..tested on a BLIZZPPC with scsi..

 
-------------
power is nothing without control
 

Offline AmiBoy

Re: 66mhz 060's
« Reply #12 on: August 16, 2005, 07:36:40 AM »
I Have an incorectly lablled 060 it was labelled as EC but some one has scrubed overit in felt pen and It has an FPU & MMU.

Itsw rated at 60MHZ but is "overclocked" to 66MHz, Im just wondering how far I can push it before it blows up?

AmiBoy
Escom A1200, Power Tower, OS3.9 & BB2, HD-Floppy drive, Mediator PCI, Voodoo 3 3000 16MB, Soundblaster 4.1, TV Tuner Card, 10/100MBit Ethernet card, Apollo 68060 66MHz with 64MB, 9.5Gig HD and 52xCDRom

Also one spare unworking bare A1200
 

Offline CLS2086

Re: 66mhz 060's
« Reply #13 on: August 16, 2005, 09:16:40 AM »
You wanna shy ?
Take a look about the Atari CPU module for FALCON the CT60, they pushed up to 120 Mhz with water cooling !
But beware with synchro bus problems !  :-o
Keep the Faith !
VG 5000/A1000/500/500+/600/2000/CDTV/1200PPC-GREX/1200PPC -ATEO-BV/4060D/CD32/Aone/Peg 1/Peg2 G4/ various funny machines too  :-) http://www.mo5.com/collection/index.php?pseudo=CLS2086
I also repair drives of our old beloved Amiga
 

Offline MuLTiViEW

Re: 66mhz 060's
« Reply #14 on: August 16, 2005, 09:28:53 AM »
 keropi:   That is confusing then with the 060.  I admit Im not quite as familiar with the 060 as some of the others.  CPU world didnt seem to have them all listed either.

 
Quote
Nope, you're getting addressing/data mixed up..the ec020 has 24bit external addressing, it still has the full 32bit data bus.


Quote
Motorola 68EC020
From Wikipedia, the free encyclopedia.

The 68EC020 is a microprocessor from Motorola. It is a lower cost version of the Motorola 68020, the difference between the two being that the 68EC020 only has a 24-bit address bus, rather than the 32-bit address bus of the full 68020, and thus is only able to address 16MB of RAM.

The 68EC020 was used as the CPU of the Amiga 1200.


 32 bit input, like the 68000
 & 24 bit ouput.

 
 
 As for the discussion of using other FPU in other CPU's over the 68060.  I was on the wave length of a discussion earlier reguarding the 060's "poor pipelining" routines for it's internal FPU.
 So some of those solutions are probably not realisticly obtainable unless there is involved a design which would do this.
 I've been discussing some over the top ideas with people elsewhere on that very matter, and dumbly didn't include the 3 hour chat log of the details leading up to that.  Sorry.

 Interesting however, this thread is.  I would like to know where people are buying 060's at these days. Seems everyone has a different source here and there.

 Also, I would REALLY like to know from the people viewing this topic, how they each cool their 060's.  I mean specificly.  What types of fans and whether or not they used thermal tape or a thermal paste.  
 I've been viewing lots of pages here and there and would like to know what people here do to keep things cool ;)


coming soon from Morrowind DVD
a movie starring:  dONKeY
 \\"Shadow of Corky the Guar\\"