There is TIMER, Var number 5(BFCAh), but it can be manipulated by any process.

I would be great if I get lucky, but if not, then I'm fortunate to be living in the USA, because there are still a couple of sellers here with old 6MHz NMOS Z80s.

Why you want to remain on NMOS? CMOS less power usage, and mutch better compatibility with modern hardwares (SD, SF3, etc).
In still in production
Only real difference the undocumented OUT (C),0 which are OUT (C),255 on CMOS (I used this in my memory test for detect Z80 type).
Because lot of Enterprise upgraded to new CMOS CPU, then don't recommended to use this tricky instructions in any program (just for CPU detect).

Since the Dave register is read-only, is there an EXOS variable that I can read to detect the current CPU speed and Dave setting?
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At EXOS 2.4 I made a 191 (PORT_BF) variable
Bit 7 now 1: disable continous auto detect (little buggy It is counts how many 50Hz video interrupts under 1Hz Dave interrupt, for detect wrong BF setting. But when programs use irq disable, then it is mess up counting, the result some extra 4/6MHz change on Dave, which can be hear on sound)
Bit 1,2,3: port BF bits.
At Cold Reset, default set to no Memory waits, and 4/6MHz bit set by CPU speed detection.
At Hot Reset PORT_BF (with AND 0Eh) sent to Port BFh (instead of the original ROM fixed value in EXOS 2.1/2.0).

The fast blink rate of the cursor on an "EDITOR:" screen is starting to get annoying

I've been living with this for about 30 years, and I like it This is sign of which powerfull Enterprise you have

And CMOS does not have LD A,R, LD A,I bug

Yes, the old NMOS Z80 design was an excellent improvement on Intel's 8080, but it does have some bugs and design issues.

I've been living with this for about 30 years, and I like it This is sign of which powerful Enterprise you have

Hahaha, that is certainly one way of looking at it!

I have now added another patch to my EXOS 2.4, to slow down the cursor speed to something that I find a little more comfortable.

It is still the same timing loop, and so you can see just how powerful your Enterprise is ( ), but it is 1/4 the previous rate which, to my old eyes, makes it far easier to see the character underneath the cursor, especially if you are running at 6/8/10 MHz.


I have only patched the EXOS ROM, and not the language ROMs, so my change only effects UK users (because the language ROMs contain their own "EDITOR:" driver).

If anyone is curious, I can post the details of the patch, and if anyone wants the language ROMs modified too, I can do that as well.

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Gondolom, hogy belsejébe megy, mert látok egy ESP8266 Wifi modult. Ehhez az órajel-generátor három vezetékén kívül további csatlakozásokra lenne szükség.

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I imagine it goes inside, because I see an ESP8266 Wifi module. That would need more connections in addition to the three wires for the clock generator.

Ah, great. I have already seen other uses of the ESP8266 as a cheap controller but I have not figured it this time. Amazing.

Does it smoothly change the clock step by step?

6MHz and less... anti-turbo testing
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so a microcontroller is needed

Oh. So the good Sir finally switched over to the Dark Side. A microcontroller. What comes next? A mysterious black millepede, maybe?