Micro controllers are not new to the EP, EnterMice or SF3 use them. The Z80 is great, but needs some aid for some demanding tasks.

Joke mode: You are right, the good orthodox side of "The Force" would have been to create an interface so the Z80 could itself manage the clock generator to be enslaved by it.....

@gflorez: I do understand that. All I wanted to do was drawing attention to the contradiction between using such modern components and his earlier purist statements^* in a humorous way.

^*Anything built with anything else but TTL circuits is cheating. Discrete logic, ASICs and MPUs are OK, anything programmable is not.

Turbo EXDOS option also tested:
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Hi.
This forum thread is not really appropriate for such topic (here talk about overclocking the Z80 processor), but let me ask you a counter question. What can GMX do that standard Enterprise can't?
Also, Enterprise does not use TR-DOS and it is not a Spectrum-compatible computer.

About RAM expansion we have this thread: https://enterpriseforever.com/interface/internal-memory-expansion/

The Enterprise can address up to 4MB of mixed Ram or Rom on 16KB chunks. Every possible chunk is numbered from 00h to FFh, and the Enterprise pagination system can put any of these 256x16KB chunks on any order, and even repeated on each one of the 4x16KB pages of the Z80 64KB memory range. This is, the 4MB pagination comes internally from stock.

I have no information, sorry, but I doubt that the Scorpion memory pagination could be easily adapted to the Enterprise.

Actually there is no problem on expanding the Enterprise memory, internally or externally, with even some cheap do-it-yourself projects available.(click above on the link on SlashNet's commentary)
 
And about the Enterprise turbo-hack, there are some information here in this thread. It is not new on Hungary to use a 6Mhz clock signal on the stock 4Mhz Z80A, because some processors allow it, but usually the procedure needs the removal of the Z80(it comes soldered to the PCB) to install a faster one, and it is a hard task. Compared to that, adding the required control logic is trivial.

Again, the internal video frequency can be used to speed up the machine to slightly more than 7Mhz, so only the 6Mhz and the 10Mhz options require an additional clock. More than the 10Mhz frequency has been tested, but makes the Enterprise unstable.

I also doubt that the GMX card turbo-mode could be adapted to the Enterprise.

Your questions are welcome.

The link to an Enterprise coprocessor you have put was a hobbyist  maths co-processor project, it used a classic-time chip(80's),  and it was never included on Basic or EXOS, only limited to tests.

Lately I have seen some R-pi or FPGA expansion projects on the MSX or CPC scenes, used as co-processors, but they are very tied to the developer desires due to the complexity. I think they are not intended for an average user....

Would the R-pi or FPGA speed-up your computer on classic applications? I doubt it. Only few new programmed apps will benefit from the new added hardware.

About how much Ram is needed..... Like you I prefer ALL possible... but the reality is that on the Enterprise scene there are only a few programs that need more than 500KB.