Chinese 68060 Rev 6

[alexh]

delshay wrote:

Kin-Hell wrote:
I think he' asking a bit much for the 60Mhz ones though!

Link

thats a real 68060 well done!

I'm pretty much sure that's an RC50 that has been re-marked. The number along the edge doesn't correspond. Although I have to admit that there is very little information on them.

Anyhow they are identical internally to RC50 and so cannot realistically demand a higher price.

[wawrzon]

i dont think so. ihave just installed a similar piece onto my csppc. the number under the mask revision says gaj99368a
and the one on te edge respectively: s23328-002. scout recognizes the unit as full 68060 rev.6. in a practical test it doesnt also show the flaws of my former 060 rev.1.

or am i missing some point?

[alexh]

I've seen several MC68060RC60's marked S23328-002 but non marked S23328-004 but I've only got a very small sample set (3)

http://www.icphotos.org/photo/MC68060RC60-large.html

Whereas all my MC68060RC50's (and I've got a lot manufactured over a large time period!) are all marked S23328-004

Admittedly I have no idea what this number is.

[Calgor]

Just thought I'd let you guys know I got a MC68060RC50 off the same lzf guy on ebay, and the markings on mine are more recent.

It is marked down the side as S23328-006, and up the top as 71E41J QQDJ0429C MALAYSIA.

Also instead of the Motorola logo it has the Freescale logo.  

Is it possible to just simply pop this into a CSPPC or a CSMK3?  Do those have 68060 sockets?  CPU060 should hopefully say it is the real thing.

[wawrzon]

if your card has a socketed processor, then it should be no problem. all my cyberstorms mk1 and ppc have and i had never an slightest issue to replace the 060 cpu. just check the orientation first and dont use brute force. after the system is up and running again scout will tell you the truth.

[alexh]

Calgor wrote:
It is marked down the side as S23328-006, and up the top as 71E41J QQDJ0429C MALAYSIA.Also instead of the Motorola logo it has the Freescale logo.

Oooo. Photo required :-o

Calgor wrote:
Is it possible to just simply pop this into a CSPPC or a CSMK3?

Yes as long as it is an 060 version. I think there are 040 versions of the CSPPC which require moding, jumpers changing, voltage regulators replacing etc.

Calgor wrote:
Do those have 68060 sockets?

Yes but they are very, very, very fragile. Take care not breaking it when removing and inserting the CPU as the repair is ~€150 at Amiga repair center in France.

Why on earth did they not use a "thru-hole" PCB design?

[AJCopland]

alexh wrote:

Calgor wrote:
It is marked down the side as S23328-006, and up the top as 71E41J QQDJ0429C MALAYSIA.Also instead of the Motorola logo it has the Freescale logo.

Oooo. Photo required :-o

New (i.e. since FreeScale) 68060s? I didn't think they made them and were just selling off stock.

alexh wrote:

Calgor wrote:
Do those have 68060 sockets?

Yes but they are very, very, very fragile. Take care not breaking it when removing and inserting the CPU as the repair is ~€150 at Amiga repair center in France.

Why on earth did they not use a "thru-hole" PCB design?

Cost perhaps? Though I'd have though thru-hole would be cheaper (without knowing anything at all about board manufacture I hasten to add) :-D

Andy

PS: Alex,  sorry I've never gotten back to you about my MiniMig, I've never been able to get decent photos of the area. Just so you know.

[miggy1974]

Hi all fellow amigans, just wondered if you could help me, i have a blizzard 1240 which i converted in to full revision 6 mc68060RC50 everything works as it should but i have replaced the 50mhz crystal with 70 and 80mhz ones trying to experiment but the board will not boot just flashes the amiga power led and resets works fine at 66mhz any ideas why it wont overclock further ?, the 060 is the full rev 6 version as i too bought it from IC china on ebay. I am using 60ns 64mb simm as i cant find any 50ns ram that works, do you know some where that sells that is compatible, also i installed a 3.3 volt fixed voltage regulator could this be the problem because i have heard that more voltage is required for the 060 at faster speeds. finally i have heard people on this forum have clocked 060s rev 6 to 80mhz using 50ns ram, is this correct ?
any help is much appreciated

[matthey]

I'm the guy that did the CSMK3 at 80MHz with 50ns SIMMs. I have since had to slow it down as I had a few errors. I think it's a limitation of the memory controller chip and not the 50ns SIMMs or rev 6 68060 (has heatsink & fan). I have a 75 MHz oscillator on the way. The CSMK3 has a place for a 2nd oscillator to clock the 68060 separate from the SCSI and motherboard clock input. Most accelerators do not allow this and changing the oscillator may also overclock the motherboard. This does make the custom chips faster but can cause problems when overclocked too much. The AGA is a little better at overclocking than ECS in my experience and you should get away with at least a 60MHz oscillator if that clock is fed into the Amiga (it's actually halfed). You want to start with lower amounts of overclocking and work your way up feeling how hot chips get and looking for errors. If my guess is correct, you will be limited to about 60 MHz but I have no experience with your accelerator. You can find some great info on Amiga overclocking here...

http://members.iinet.net.au/~davem2/amiga.html

I found my Crucial 50ns 32Mb EDO SIMMs on Ebay. They are not common but do pop up from time to time. Most if not all will be EDO. Make sure they are 5 volts!

Your voltage regulator should be fine. The voltage doesn't change with a faster processor. It draws more amps.

[miggy1974]

hi mate, thanks very much for the info, i will try and get 50ns compatible simm you mention on ebay and overclock in small steps to see what my blizzard will actually achieve

Thanks again

[Damion]

miggy1974 wrote:
hi mate, thanks very much for the info, i will try and get 50ns compatible simm you mention on ebay and overclock in small steps to see what my blizzard will actually achieve

Thanks again

The Blizzard 1260 usually hits 66MHz OK, the SCSI kit may or may not work at that clock depending on the revision of the SCSI kit. Mine started to act funny around 70-72MHz.

As matthey stated, the external bus is a limiting factor. If you can set the clock divider to 040 setting (BCLK 1/2 PCLK), in theory 80MHz should be no problem, RAM would then run at 40MHz. On the Apollo cards the divider is easily set with a jumper. (Even with the RAM at 1/2 CPU, the thing flies at 80MHz, so it's worth exploring if you can figure it out.) Not overclocking the bus puts a lot less stress on the card IMHO.

[DoogUK]

Is the apollo a better choice for overclocking the 68060 on?

[Damion]

DoogUK wrote:
Is the apollo a better choice for overclocking the 68060 on?

It's definitely the easiest, for sure. Running the bus at 1/2 CPU clock is easy on the card, and the Apollo has a nice RAM controller, so 40MHz RAM is still plenty fast.

Here's a bustest benchmark from an Apollo 1260 at 80MHz CPU/40MHz RAM:

BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
fast $01458000 readw 53.7 ns normal 37.2 * 10^6 byte/s
fast $01458000 readl 95.5 ns normal 41.9 * 10^6 byte/s
fast $01458000 readm 95.6 ns normal 41.8 * 10^6 byte/s
fast $01458000 writew 70.5 ns normal 28.4 * 10^6 byte/s
fast $01458000 writel 140.9 ns normal 28.4 * 10^6 byte/s
fast $01458000 writem 141.1 ns normal 28.3 * 10^6 byte/s
chip $00060000 readw 968.1 ns normal 2.1 * 10^6 byte/s
chip $00060000 readl 970.0 ns normal 4.1 * 10^6 byte/s
chip $00060000 readm 970.3 ns normal 4.1 * 10^6 byte/s
chip $00060000 writew 613.1 ns normal 3.3 * 10^6 byte/s
chip $00060000 writel 614.0 ns normal 6.5 * 10^6 byte/s
chip $00060000 writem 614.1 ns normal 6.5 * 10^6 byte/s


Now, here's one from a CSMK3 at 50MHz CPU/RAM:

BusSpeedTest 0.19 (mlelstv) Buffer: 262144 Bytes, Alignment: 32768
========================================================================
memtype addr op cycle calib bandwidth
fast $08718000 readw 64.2 ns normal 31.2 * 10^6 byte/s
fast $08718000 readl 107.8 ns normal 37.1 * 10^6 byte/s
fast $08718000 readm 108.9 ns normal 36.7 * 10^6 byte/s
fast $08718000 writew 72.3 ns normal 27.7 * 10^6 byte/s
fast $08718000 writel 144.9 ns normal 27.6 * 10^6 byte/s
fast $08718000 writem 150.2 ns normal 26.6 * 10^6 byte/s
chip $00130000 readw 1005.6 ns normal 2.0 * 10^6 byte/s
chip $00130000 readl 1006.3 ns normal 4.0 * 10^6 byte/s
chip $00130000 readm 1005.7 ns normal 4.0 * 10^6 byte/s
chip $00130000 writew 612.7 ns normal 3.3 * 10^6 byte/s
chip $00130000 writel 612.9 ns normal 6.5 * 10^6 byte/s
chip $00130000 writem 614.4 ns normal 6.5 * 10^6 byte/s  


As you can see, even with a 10MHz disadvantage in RAM speed, this setup on the Apollo is still damn fast (as far as classic miggys go, LOL).

 

[delshay]

Calgor wrote:
Just thought I'd let you guys know I got a MC68060RC50 off the same lzf guy on ebay, and the markings on mine are more recent.

It is marked down the side as S23328-006, and up the top as 71E41J QQDJ0429C MALAYSIA.

Also instead of the Motorola logo it has the Freescale logo.  

Is it possible to just simply pop this into a CSPPC or a CSMK3?  Do those have 68060 sockets?  CPU060 should hopefully say it is the real thing.

i also have MC68060RC60 with the marking down the left hand side ending with 004 but i also have two ending with 006.

when overclocking voltage is also important as is the speed of simm.

iv had a Blizzard PPC with a 80Mhz bus speed with no precharge set in the Blizzard PPC RAM menu.

Blizzard PPC modifyed with a single OSC.

[DoogUK]

I have also bought one of the latest mask 060's from china and hopefuly getting put on my apollo 1240 when it gets back from repair.

[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.