Chinese 68060 Rev 6

[alexh]

Calgor wrote:
Just thought I'd let you guys know I got a MC68060RC50 off the same lzf guy on ebay instead of the Motorola logo it has the Freescale logo.

Where is the photo of this?? Come on, use your phone or something.

[Munchkin]

They're most likely picked from old hardware. I got two 060/50 from a friend a number of years ago that he rescued from discarded cards from some industrial robots. They just switched the cards when something went bad and threw the old one away.

These are probably scavenged in a similar way by someone who knew there is a market for them.

Never had the opportunity to test if those CPU's I've got are ok or not since I have to rebuild my CS MK-II to do that and if they don't work I'll have to convert it back again...

[warpdesign]

perhaps if this processor was usless it wouldnt be that pricey

Perhaps it would be cheaper if had been produced in higher quantities (ie: was usefull for a lot of people)

[matthey]

I got my 75MHz oscillator today and so far it's been rock solid in my CSMK3. Here's my bustest...

BusSpeedTest 0.19 (mlelstv)   Buffer:     262144 Bytes, Alignment: 32768
========================================================================
memtype   addr       op         cycle     calib         bandwidth
fast      $08AB0000  readw      35.7 ns   normal      56.0 * 10^6 byte/s
fast      $08AB0000  readl      58.6 ns   normal      68.3 * 10^6 byte/s
fast      $08AB0000  readm      59.7 ns   normal      67.0 * 10^6 byte/s
fast      $08AB0000  writew     39.6 ns   normal      50.5 * 10^6 byte/s
fast      $08AB0000  writel     79.3 ns   normal      50.5 * 10^6 byte/s
fast      $08AB0000  writem     82.8 ns   normal      48.3 * 10^6 byte/s
chip      $00020000  readw     859.6 ns   normal       2.3 * 10^6 byte/s
chip      $00020000  readl     860.1 ns   normal       4.7 * 10^6 byte/s
chip      $00020000  readm     859.8 ns   normal       4.7 * 10^6 byte/s
chip      $00020000  writew    565.3 ns   normal       3.5 * 10^6 byte/s
chip      $00020000  writel    565.6 ns   normal       7.1 * 10^6 byte/s
chip      $00020000  writem    565.8 ns   normal       7.1 * 10^6 byte/s

Nice memory speedup from overclocking. Processor speed is still more important because of
the caches though. I have heard of a guy with an Apollo '060 that claimed 100 MHz. Bad
thing about the Apollo is the bad/broken SCSI. The Quickpack '060 with EDO SIMMs would
have faster memory access than my CSMK3. I wonder how well they overclock. One last note
about SIMMs. They should be as least as fast as they are marked but some that are not
marked fast are. For example, I have some 16Mb SIMMs that are marked 60ns but tested 47ns
on a SIMM tester. Some SIMMs may work but cause problems or produce errors later when they
heat up. Some accellerators just don't like certain SIMMs. The best thing is to try
different SIMMs. Also, fit as few of SIMMs as possible during testing.

[delshay]

simms can go 43ns or was it 45ns.

you can also build your own simms if you are good at soldering,desolder the old chip off the simm card and replace with faster ones ( custom built ).

[Damion]

matthey wrote:
I got my 75MHz oscillator today and so far it's been rock solid in my CSMK3. Here's my bustest...

BusSpeedTest 0.19 (mlelstv)   Buffer:     262144 Bytes, Alignment: 32768
========================================================================
memtype   addr       op         cycle     calib         bandwidth
fast      $08AB0000  readw      35.7 ns   normal      56.0 * 10^6 byte/s
fast      $08AB0000  readl      58.6 ns   normal      68.3 * 10^6 byte/s
fast      $08AB0000  readm      59.7 ns   normal      67.0 * 10^6 byte/s
fast      $08AB0000  writew     39.6 ns   normal      50.5 * 10^6 byte/s
fast      $08AB0000  writel     79.3 ns   normal      50.5 * 10^6 byte/s
fast      $08AB0000  writem     82.8 ns   normal      48.3 * 10^6 byte/s
chip      $00020000  readw     859.6 ns   normal       2.3 * 10^6 byte/s
chip      $00020000  readl     860.1 ns   normal       4.7 * 10^6 byte/s
chip      $00020000  readm     859.8 ns   normal       4.7 * 10^6 byte/s
chip      $00020000  writew    565.3 ns   normal       3.5 * 10^6 byte/s
chip      $00020000  writel    565.6 ns   normal       7.1 * 10^6 byte/s
chip      $00020000  writem    565.8 ns   normal       7.1 * 10^6 byte/s

 :-o  That's quick. I can match your chip numbers if I boot without startup (or use a low-res screenmode), no way to come near the fastram speed though, LOL.

Any chance you could to a Quake timedemo sometime (no hurry), default settings with AGA/NTSC? It would be interesting to see what kind of effect the fast memory has on the result.

[sdyates]

True, the Chinese are leaders today in chip technology. Learning the language one day may prove very useful.

[matthey]

@-D-

Overclocking the CSMK3 to 75 MHz now gives better memory performance than the stock Quikpack 68060 with EDO (+15-20%)...

http://www.hd-zone.com/amiga/quickpak.html

I would like to see what an overclocked Quikpack would do. I've never heard of anyone overclocking one by very much. If the Natami ever comes out it would probably be able to double these numbers!

I currently have the CSMK3 in my 3000T (no AGA) but I'll try putting it back in my 4000T pretty soon. I have Clickboom Quake and QuakeGL (Mediator+Voodoo4) installed and the QuakeGL is a little faster, looks nicer, and is less buggy. I play in 640x400 as 640x480 slows down too much at times. The Voodoo4 isn't very well utilized on the Amiga or more would be possible.

[KatManDEW]

Please forgive my ignorance on the topic, but are the 68060's on EBay better than the xc variant of the 060?

I want to upgrade my  Appolo 1240, and I'm wondering if I should get one of the 060's on EBay...

[matthey]

@KatManDEW

There were some 68060's with 71E41J mask (shrunk die size) that typically overclock from 75-100MHz and produce less heat. Most were marked MC instead of XC. I don't see any more available at the moment though.

You need to change the voltage in your accelerator from 5V to 3.3V for your upgrade as well as having the proper oscillator.

edit:

Actually, there are these 60MHz versions...

http://cgi.ebay.com/Motorola-MC-68060-RC-60-71E41J-100-WORKING_W0QQitemZ260361281511QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item260361281511

The others were 50MHz and much cheaper.

[tiffers]

Ok, so what is this then? Same seller, apparently a 68060, but it doesn't seem to be marked as a 68060.

Only $15 Buy It Now too...


http://cgi.ebay.com/Motorola-68060-SC414423RC75-75G59Y_W0QQitemZ260296045711QQcmdZViewItemQQptZLH_DefaultDomain_0

[alexh]

G59Y mask set means it is quite old.

This is an EC part (no FPU or MMU).