wawers@DMZRZU71.BITNET (06/10/87)
Hello, ATARI-World !
In one of the last issues of a local ST-Paper, a 68861 Co-Processor for the
1040 was offered. Since I also use the ST for large numerical calculations,
I'm looking for a compiler which produces a faster code or a Co-Processor,
like the 68 8 81.
Now, I don't know yet how many MARKS it costs, but I assume that it isn't
really cheap.
Is there any 1040 out there which has already a 68881 build in ?
Does the money pay off ?
What software do I need ?
Theo
BTW: The ad said, that the 68881 would speed up your ST 750 times.
That's incredible ! The little ST as fast as the ol' CRAY 1 ?
I would be satisfied, if it runs THREE times faster than without Co-Proc.
BITNET: WAWERS@DMZRZU71.BITNETftw@datacube.UUCP (06/12/87)
You will also have to find a compiler that will provide a trap handler to pass all those "illegal" instructions to the '881. The 68881 is meant to be a companion to the 68020; not really the 680[00-12]. There is some overhead involved in passing stuff off to the '881, but for number-crunching applications, it should still pay off.
Sheldon_Hijacker_Chang@cup.portal.com (08/01/87)
Gee 750 times!?!?!?! That's sounds almost impossible!! I mean, your
Atari ST is already VERY fast.
Sheldon the Hijacker