gibsonm@milton.u.washington.edu (Michael Gibson) (06/26/91)
I have a question..... what are the differences between the 16 Mhz A3000
and the 25 Mhz A3000?
also, more importantly, A friend of mine told me that a 16 Mhz A3000
equipped with one of these upcoming 68040 accelerators would run just
as fast as a 25 Mhz A3000 equipped with the same accelerator, despite the
difference in clock speeds. Is this true? Will the 040 board replace all
of the previous processors functions, including clock speed? I ask this
because the 16 Mhz model is cheaper, and I am planning on getting an 040
board anyway.
I'm sorry if this question has been asked before, but I'm new to the net.
Thanks. Michael Gibson
gibsonm@milton.u.washington.edumetahawk@aix01.aix.rpi.edu (Wayne G Rigby) (06/27/91)
In article <1991Jun26.084759.3283@milton.u.washington.edu> gibsonm@milton.u.washington.edu (Michael Gibson) writes: > >I have a question..... what are the differences between the 16 Mhz A3000 >and the 25 Mhz A3000? The A3000-16 has a 68030 & 68881 running at 16 MHz. The A3000-25 has a 68030 & 68882 running at 25 MHz. These are the major differences. >also, more importantly, A friend of mine told me that a 16 Mhz A3000 >equipped with one of these upcoming 68040 accelerators would run just >as fast as a 25 Mhz A3000 equipped with the same accelerator, despite the >difference in clock speeds. Is this true? Will the 040 board replace all >of the previous processors functions, including clock speed? I ask this >because the 16 Mhz model is cheaper, and I am planning on getting an 040 >board anyway. An A3000-16 can have its bus running at either 16 MHz or 25 MHz. There is suppose to be a jumper somewhere to switch the bus from timing off of the 16 MHz crystal to a 25MHz crystal on an external board (I think this is how it works). So you can add a 25 MHz 68040 board and have the Amiga run just as fast as an A3000-25 with an '040-25 in it. Of course, in the distant future. Commodore might possibly come out with a version of the OS that could run on multiple CPU's, in which case the A3000-25 with an '040-25 would run faster than an A3000-16 w/'040-25 (the '030/'882 has to be disabled in the 16 MHz version). I just finished taking a course on Operating Systems and Concurrent & Distributed Programming, which goes into multiple processor OS's. Creating one is definitely not trivial, and I wouldn't expect one for about 2 years, if C= started working on one. So, effectively, if you are planning on upgrading to an '040, the A3000-16 would run just as fast as an A3000-25 similarly equipped. >I'm sorry if this question has been asked before, but I'm new to the net. > > >Thanks. Michael Gibson > > gibsonm@milton.u.washington.edu "Hello? Is there anybody in there? Wayne Rigby "Just nod if you can hear me." Computer and Systems Engineer - Pink Floyd (A delightful blend of EE and CS) Rensselaer Polytechnic Institute Yes, C-128's still live! metahawk@rpi.edu