30 January 2011, 19:12 | #1 |
Registered User
Join Date: Sep 2009
Location: San Antonio, TX USA
Age: 50
Posts: 1,185
|
Overclocking 68882 40MHz to 50Mhz
Is there a problem overclocking MC68882 40MHz to 50MHz? Is is stable? The 50 MHz version is hard to come by. I have Blizzard IV for A1200.
Thanx |
30 January 2011, 19:18 | #2 |
Professional slacker!
|
|
30 January 2011, 19:37 | #3 |
Registered User
Join Date: Sep 2009
Location: San Antonio, TX USA
Age: 50
Posts: 1,185
|
How about XC versions of the chip, I read that they are to as good as MC, is that true???
|
30 January 2011, 19:43 | #4 |
Professional slacker!
|
|
30 January 2011, 21:20 | #5 |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,771
|
Put some small heatsink on it, maybe one of those dedicated for modern memory chips.
It should run ok even with higher clock. |
31 January 2011, 01:16 | #6 |
Registered User
Join Date: Sep 2009
Location: San Antonio, TX USA
Age: 50
Posts: 1,185
|
|
31 January 2011, 13:02 | #7 |
Registered User
Join Date: Dec 2009
Location: Southampton / UK
Posts: 91
|
I'm sure I read somewhere (possibly from rkauer) that all the PGA 68882s are the same and you can clock any of them to 50MHz quite safely. I'd do your homework first to be sure, but you could be lucky.
|
01 February 2011, 01:23 | #8 |
Global Moderator
Join Date: Aug 2008
Location: Sidcup, England
Posts: 10,300
|
That's what I've heard too, but I didn't want to be the first to post in case my memory had blurred in the meantime...
|
01 February 2011, 04:42 | #9 |
Registered User
Join Date: Oct 2009
Location: Oswego, IL
Posts: 125
|
I have it running at 56mhz and its rock stable
|
03 February 2011, 22:54 | #10 |
Cat lover
Join Date: May 2004
Location: Italy
Age: 54
Posts: 804
|
|
04 February 2011, 02:15 | #11 |
I hate potatos and shirts
|
XC is eXperimental controller, MC is Military Certified.
XC is the earlier chips that usually heat a lot more than the final MC versions. |
04 February 2011, 17:27 | #12 |
-
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,863
|
|
04 February 2011, 18:38 | #13 |
I hate potatos and shirts
|
???
MC means military certified for Motorola/Freescale CPU and the likes. Believe it or not, the MC68060 CPU is used on guided bombs & missiles. |
04 February 2011, 19:01 | #14 |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,771
|
XC is similar to Intel engineering samples, MC is a commercial product - military products are usually available under different marking.
|
04 February 2011, 21:07 | #15 | |
-
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,863
|
Quote:
MC is just the manufacturer code for Motorola. Just like Z is Zilog, Am is AMD, TMS is Texas Instruments etc.. Last edited by Jope; 04 February 2011 at 21:15. |
|
05 February 2011, 20:45 | #16 |
Air supremacy
Join Date: Aug 2008
Location: Rijeka Croatia
Age: 49
Posts: 121
|
MC68000 is key component of AGM-88A HARM (High Speed Anti Radiation Missile), weapon designed to take out land and naval based radars. Manufacturer, Texas Instruments, used 68K to triangulate source of radar waves in realtime, storing fixed position into memory (maybe that was FastRAM, LOL) just in case radar operator switched off radar (common practice used in order to break lock on anti-radiation missiles of previous generation).
Just to put things into historic aspect, that was back in 1985. |
06 February 2011, 13:54 | #17 |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,771
|
TI IMO use for this TMS320 family (still producing in MIL version even old 320C10), 68K is used due of high popularity of the VME standard in industry and military - but still this not change that XC means pre-productions chips (still some potential errors to fix) and MC means Motorola Certified ie commercial product free from known errors.
|
06 February 2011, 14:07 | #18 | |
Wipe-Out Enthusiast
Join Date: Nov 2005
Location: .
Age: 43
Posts: 2,538
|
Quote:
Hitachi (HD68000) Mostek (MK68000) Rockwell (R68000) Signetics (SCN68000) Thomson (EF68000/TS68000) Toshiba (TMP68000) Then i would be inclined to agree with Jope on this one! MC as 'military certified' just seems to random a leap from the naming convention, whilst 'Motorola Certified' seems a lot more... well.... sensible |
|
06 February 2011, 17:21 | #19 |
Registered User
Join Date: Jun 2010
Location: PL?
Posts: 2,771
|
All IC from Motorola are MC - eg MC1309 is FM Stereo Decoder - seems not very usefull functionality for military.
|
06 February 2011, 17:36 | #20 |
Registered User
Join Date: Jun 2008
Location: Boston USA
Posts: 466
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
Thread Tools | |
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Expansion 68882 overclocking | GadgetUK | support.Hardware | 3 | 30 March 2013 10:34 |
Group buy of 68882@50Mhz | jman | MarketPlace | 0 | 06 September 2011 09:32 |
Want to buy: 68882 50Mhz PGA | Thorham | MarketPlace | 1 | 10 July 2011 14:46 |
WTB: 68882 50mhz FPU for Blizzard1230 MK4 | HOL2001 | MarketPlace | 0 | 17 June 2011 23:32 |
Overclocking 68882 | desantii | support.Hardware | 16 | 16 December 2009 21:08 |
|
|