Need explanation of the CPU and FPU technology on turbo boards

[DonnyEMU]

I would just tell you the following, back in the 80s I did everything I could to speed up my amiga 1000, including adding a 16 mhz 68000 processor with a 68881 math FPU.. I had to have specially designed math libraries to take advantage of this. However both the 16 mhz update and the FPU libraries weren't much help because:

a) not too many programs including cad supported the FPU without having it attached to the 60020 or inbuilt in the 68030. Those programs that did really didn't show any noticeable increase in speed. Mostly due to the speed of the other chips on the motherboard and how communication between those worked.

We generally came to the conclusion that this kind of upgrade was a complete waste of time, unless you like the tech and tinkering inside your box..

This whole thing about putting an FPU there for the minimal increase you get without being coupled with a 32 bit cpu and memory is pretty much a complete waste of time for the average user.

It's amazing to me to see these posts for something I tried 20 some years ago because I couldn't afford a faster CPU and I was trying to get every ounce of performance I could.

Still it's fun to toy with this stuff..

[DonnyEMU]

Please I was an Amiga developer, I am not an average user. My point is simply this, even with a 16 mhz upgrade and an FPU and a Crystal on an A500 the upgrade is hardly worth any noticeable increase, especially with a motherboard that internally runs on a rate that is compatible with NTSC/PAL clock rates.

The point simply that I was making is most people buy an FPU to see a speed increase.. I had the special IEEE libraries and into the 90s I kept that machine and tried software that supported them as well too..

The point I am making is it's more worthwhile to get an accelerator that combines the FPU and CPU with memory. That's where you'll get your speed increase and programs that really take advantage of the special math operations..

Many later Amiga's didn't come with FPUs like the 030 machines and above which had the EC030 chips. Some had them built right into the cpu.

The response I was talking about was specifically the people with FPU accelerators on the 68000 chips. I probably have an old A/C guide from like 91 which lists programs that support FPUs and my point is you have to differentiate programs that just support using the mathieee libraries and those that are code compiled for an 20/881 030/882 etc. from the others because they work differently and support the CPU differently. Some programs for a while didn't run when the EC030 chips showed up..

A nice database and list out on the internet would be cool if someone would make it..