Assembly Help

Circuitbuilder9

Hello,everybody:

I was practicing assembly (i am a beginner), and i would like to know how to pass a variable in the DAT section to the PUB section. I know you can modify par's in the PUB, but how do you pass it up from the DAT? I am confused on how to use the par register; it is confusing to know what get's passed to which method, and so far and so forth.

Please help me understand this passing of parameters, and thank you.

turbosupra

I'm also a newb, but I kind of understand this so maybe I can explain from a newb point of view.

If you have Par, that is your zero positioning point. The next spin long that you have is par+1long, after that is par+2longs.

When you pass par as an address in the PASM initialization, you can then define a ptr to the long par+1, par+2 etc etc and move the address par+1 to a ptr variable defined at the bottom, so you can then write the ptr variable name, and it in turn writes to the address that is associated with it. Does that make sense? I threw together some generalized code, but if you post your project I'll insert applicable code into it.

Generalized code would look like

VAR

par
parPlusOneLong
parPlusTwoLong


PUB Main

cognew(@pasm, @par)




DAT

pasm

initialize


restart

           code here



          jmp #restart

'---------------------------------------------------------------------------------------------
' predefined variables

parPtr   long   0
parPlusOneLongPtr   long 4
parPlusTwoLongPtr   long 8



' regular variables

one   long   0
two   long   0

User Name

Circuitbuilder, I would recommend you look at post #3 of this thread.

lardom

User Name, Great link. Thanks.

User Name

You are welcome. I really think Graham's series of tutorials do about as fine a job of explaining the basics of Prop programming as any document anywhere.