1. Low Level Mem Question
- Posted by Alan Tu <ATU5713 at COMPUSERVE.COM>
Jun 22, 1998
-
Last edited Jun 23, 1998
It seems to me there are too types of memory addresses. I've seen both i=
n
Euphoria.
poke(1052, 13) -- "put" for lack of better term carriage return into
address 1052 (meaningless instruction)
peek(#417) get a byte from memory
Just for curiosity. How are memory addressed referenced by byte? Is it
strictly hexadecimal? And what does the # sign signify in the second
example? Now, these two addresses have special meaning. I've also heard=
that other addresses have special meaning (such as screen memory, all
sorts). Is there a list of these somewhere, online or in a text file? =
Thanks.
--Alan
=
2. Re: Low Level Mem Question
- Posted by Irv <irv at ELLIJAY.COM>
Jun 22, 1998
-
Last edited Jun 23, 1998
Alan Tu wrote:
> It seems to me there are too types of memory addresses. I've seen both in
> Euphoria.
>
> poke(1052, 13) -- "put" for lack of better term carriage return into
> address 1052 (meaningless instruction)
>
> peek(#417) get a byte from memory
>
> Just for curiosity. How are memory addressed referenced by byte? Is it
> strictly hexadecimal? And what does the # sign signify in the second
> example?
The reference is by number, poke(255,13) is the same as poke(#FF,13)the # sign
means a hex number.
> Now, these two addresses have special meaning. I've also heard
> that other addresses have special meaning (such as screen memory, all
> sorts). Is there a list of these somewhere, online or in a text file?
> Thanks.
Yes, there's a file named dosref34.exe on my ftp site which lists all sorts of
usefulDOS addresses and interrupt calls, etc. But it's large - about 300K.
Also remember that peeking is pretty safe, while poking is a dangerous game.
Hmm. there's a joke there somewhere.
Irv
http://www.mindspring.com/~mountains
ftp.mindspring.com/users/mountains/dosref34.exe
3. Re: Low Level Mem Question
Irv wrote:
>>>>>
The reference is by number, poke(255,13) is the same as poke(#FF,13)the #=
sign
means a hex number.
<<<<<
Yes, but how does that relate to the megs of memory I have. Do the
addresses just start from 1. (I know about conventional, upper, and
extended mem and their starting/ending positions. These numbers are byte=
s,
right?
--Alan
=
