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Thanks to Gavilan, I now have an M-tec M1200 4MB FastRAM expansion for my A1200. There is an empty FPU socket on there, too and I have a spare FN40 that will go in it. Amiga Resource suggests it can go up to 40MHz, but the thing is, there's no sign of an oscillator on there, or any jumpers to fiddle, so how do I specify what speed to run the FPU at?
http://amiga.resource.cx/exp/mtec1200lc
http://amiga.resource.cx/photos/photos/mtec1200lc.jpg
I think It's going to run off the Mobo system clock Andy, 28Mhz, but if divided by 2 then 14Mhz, same as the EC020 onboard
TC :)
Since the board does not have a companion software to drive the clock rate of the FPU, I agree with Bas. It does only run in standard 14MHz.
Grab some HSMath libraries to speed the FPU operation in software.
=D
http://www.guildserver.co.uk/tempfiles/osc.jpg
that should do it.
Keith, you're a legend! You never cease to amaze me with your 1337 m4d5k1llz :thumbsup:
If you do add an oscillator, could you pls post some pics?
OK, so I can plug an osc on there and run an FPU, however a 40MHz FPU seems like overkill for a 14MHz '020. So, maybe I'll try and get a 40MHz 68030 for my Apollo 2030 and use the 40MHz FPU with that, and donate the 20MHz one I remove from the Apollo to the M1200. Sound sensible?
Anyone know where I can buy a 40MHz PGA 68030?
@AndyLandy
On this card just drop in a 33MHz Xtal and a MC68882FN25 FPU
MC68882FN25 £9.95 + shipping (click here for ebay.com BIN)
http://i24.ebayimg.com/04/i/001/11/26/9a22_2.JPG
If you want a 40mhz PGA 030, you could easly use this
MC68030RP33 £25.78 + £7.71 postage (click for ebay.com BIN)
http://i22.ebayimg.com/04/i/000/c0/c2/df27_1_b.JPG
Both components should be over clockable, the 68882 FPU clocked to 33MHz and the 68030RP33 clocked to 40MHz although adding a little low-profile heat sink would be an idea.
I can get a genuine 40MHz part for £32.24 + £8.36:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=230397026652
Or I could get an EC variant for £12.88 + £7.71:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=230404559173
£20 is quite a bit to spend on an MMU that I'll probably never use. Still, it'd be nice to have, just for completeness. :-)
MMU is nice to have if you want to run some speed patches, like memory defragmenter (Poolmem, etc), muForce, Mungwall and Enforcer (don't remember about this last one requiring MMU or not).