1. poke2 (to Rob)
- Posted by r.schr at t-online.de
Sep 15, 2001
Hi Rob,
do you see the neccessity to have a poke2() implemented into Euphoria?
What is your opinion or your recommendation instead?
Have a nice day, Rolf
2. Re: poke2 (to Rob)
Rolf writes:
> do you see the neccessity to have a poke2()
> implemented into Euphoria?
> What is your opinion or your recommendation instead?
I haven't seen a big demand for poke2().
If I added it, I'd also have to add peek2u() and peek2s()
for completeness. In most cases where it comes up,
speed is not critical, so (assuming a "little-endian" Intel machine)
you could use:
poke(address, {number, floor(number/256)})
On my 350 Mhz Pentium, I can do the above statement
over 1.4 million times per second.
Regards,
Rob Craig
Rapid Deployment Software
http://www.RapidEuphoria.com
3. Re: poke2 (to Rob)
On 15 Sep 2001, at 19:18, Robert Craig wrote:
>
> Rolf writes:
> > do you see the neccessity to have a poke2()
> > implemented into Euphoria?
> > What is your opinion or your recommendation instead?
>
> I haven't seen a big demand for poke2().
> If I added it, I'd also have to add peek2u() and peek2s()
> for completeness. In most cases where it comes up,
> speed is not critical, so (assuming a "little-endian" Intel machine)
> you could use:
>
> poke(address, {number, floor(number/256)})
>
> On my 350 Mhz Pentium, I can do the above statement
> over 1.4 million times per second.
Ouch!! 233 clocks to execute one poke?
Kat
4. Re: poke2 (to Rob)
- Posted by r.schr at t-online.de
Sep 16, 2001
Robert Craig wrote:
>
>
> Rolf writes:
> > do you see the neccessity to have a poke2()
> > implemented into Euphoria?
> > What is your opinion or your recommendation instead?
>
> I haven't seen a big demand for poke2().
> If I added it, I'd also have to add peek2u() and peek2s()
> for completeness. In most cases where it comes up,
> speed is not critical, so (assuming a "little-endian" Intel machine)
> you could use:
>
> poke(address, {number, floor(number/256)})
>
> On my 350 Mhz Pentium, I can do the above statement
> over 1.4 million times per second.
>
Rob, it's _not_ a question of speed! It's a question how to write a word
with EU! The point here is that if you watch the lines of the 16-bit-ISA
bus with a logic state analyzer, its a difference writing two bytes one
after the other instead writing 16 bits at once (a word), which it's
possible with C.
I'm not familiar with assembler. I would ask if someone is able to write
an EU-routine to include written with assembler. It would be sufficient
for my demands. Is their anyone able to help me? I couldn't find
anything in the archive.
Thanks, and have a nice day, Rolf
5. Re: poke2 (to Rob)
- Posted by r.schr at t-online.de
Sep 16, 2001
Error correction of my last mail:
... which is possible with C.
^^
Rolf
