Axe Q&A

[Wellen]

I attached it below 

[Freyaday]

how do I find the square root of an 8.8 number?

[jacobly]

If you don't care too much about accuracy, you can do √(A)∗16.
Alternatively, I wrote an 8.8 square root routine in asm... If you can give me a token to use (not √( since Axe has dibs) I could make an Axiom.

[Builderboy]

I attached it below  

Ah this looks like a bug with Axe's peephole optimizer!  Dang it, here I was telling you to upgrade and it's not even a stable build In the meantime, instead of selecting your program by pressing enter, press the Zoom button instead, and everything should work like it normally does.  

[Freyaday]

If you don't care too much about accuracy, you can do √(A)∗16.
Alternatively, I wrote an 8.8 square root routine in asm... If you can give me a token to use (not √( since Axe has dibs) I could make an Axiom.

that would be great. Axe has lots of unuesd tokens, and I believe you can even make your own token hook if you so desire.

[jacobly]

I decided to use seq( since it has two letters in common with sqrt(.

Axiom SQRT:
  seq(a): returns the square root of the 8.8 number a in 8.8 format.
  seq(a)ʳ: returns the square root of the unsigned integer a in 8.8 format.

[Wellen]

Ah this looks like a bug with Axe's peephole optimizer!  Dang it, here I was telling you to upgrade and it's not even a stable build In the meantime, instead of selecting your program by pressing enter, press the Zoom button instead, and everything should work like it normally does. 

Doing this, it does the same as with 0.5.0/0.5.3 ... 
I wrote a little program that checks if the appvar really exists, also the same method as ATILOCK : I load it into an file, and display what it points to (actually the code)
What I do in this screenshot :
-I compile ATEST
-I "zoom" A(TILOCK)
-run Tilock : it's okay
-run Test : it finds the code, it's okay
-run Tilock : it asks for the code, ok
-run Test : finds the code, ok
-run Tilock : doesn't find the appvar or what else ?
(-I cry)


Also, what's "zooming" ? 

[squidgetx]

I believe your screenshot is missing an End..

Also files are in general buggy; try copying the file data to an area in RAM and reading from there.

[Wellen]

There is an 'End', I just didn't scroll a the bottom (you talk about ATEST's code ?)

I'll try another way if the files don't work, but I just wanna know why it doesn't work

[epic7]

Will this work for load and save game?

Code: Select All | Copy To Clipboard

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

:.Load game label :Lbl L :"appvMONEY"→Str0 :"appvLEVEL"→Str9 :Unarchive Str0 :Unarchive Str9 :!If GetCalc(Str9)→W or GetCalc(Str0)→E :Goto N :End :{W}→G :{E}→L :Goto 1 :Lbl N :. Im not sure what to put as the size :GetCalc(Str0,64)→W :GetCalc(Str9,32)→E :0→{W}→{E}→G→L :Lbl 1 :. At the end of the code... :. The save subroutine :Lbl SAVE :Unarchive Str0 :Unarchive Str9 :G→{W) :L→{E} :Archive Str0 :Archive Str9 :Repeat getKey(9) :ClrDraw :Text(1,1,"Saved!") :DispGraph :End :Return

[Builderboy]

Two things wrong with that code, but if fixed, your code does look like it will work.  Firstly:

Code: Select All | Copy To Clipboard

1	:!If GetCalc(Str9)→W or GetCalc(Str0)→E

That does not do what you think it does, because again, Axe does not follow order of operations.  It is actually doing this:

Code: Select All | Copy To Clipboard

1	:!If ((GetCalc(Str9)→W) or GetCalc(Str0))→E

Which is not what you want.  Adding some parenthesis in the right place can help fix this problem.  Secondly:

Code: Select All | Copy To Clipboard

1	:0→{W}→{E}→G→L

This is a quirk of Axe, but when you do 0->{#}->A, A will now hold #, not 0.  Separating these lines will help this issue

[epic7]

So use
:!If ((GetCalc(Str9)→W) or GetCalc(Str0))→E
Instead?

[Builderboy]

No, that was my example of what is actually happening.  You need to put parenthesis in different places in order to achieve the effect you desire.

[epic7]

How would I do that then?

:!If (GetCalc(Str9)→W) or (GetCalc(Str0)→E)

or something?


Also, what is a good size to use for the appvars?
{W} will be up to several thousand
{E} will be up to 6

[ztrumpet]

Is there a way to Push and Pop in Axe without having to resort to Asm()?