Structs in Assembly?

[xcarbonx]

Hello, I was just wondering if it is possible to create a data struct in assembly 8086. For example, creating a struct that holds a student's name and ID number.

[phfilly]

Go check out this link...maybe it will help you

http://stackoverflow.com/questions/108443/data-structure-for-assembly-code-research

[xcarbonx]

It is somewhat helpful, but I don't want to code structs in c++, I was wondering if you could literally code structs in assembly language (8086)

[GunnerInc]

What assembler?

[xcarbonx]

emu8086

[NotNull]

Creating a data structure in 8086 assembler is as simple as declaring
any other data variables.

MYVAR1 DB 0 ; an 8-bit quantity

FAR_OFF DW 0 ; a 32-bit far pointer
FAR_SEG DW 0

; Now for the mentioned data structure
StudentId DW 0 ; this is also the address of the structure
StudentName DB ? DUP(64) ; Create 64-byte Character Array For Name

also some assemblers provide a STRUCT directive

STRUCT MyStruct
 StudentId DW ?
 StudentName DB ? DUP(64)
END STRUCT

Declare an instance of the structure and then you should be
able to refer to it's members by name and create other
instances.

[johnhagen]

how we can pass use that struct into external methods. i mean what if we invoke the method . how we can pass the struct?

[Assembly Guy]

Pass a pointer to the struct

[johnhagen]

allright. if i pass addr. of StudentId can i say assume ebx:ptr StudentId and then use other fields myStruct.studentName etc.
by the way 8086

[Assembly Guy]

If you had a pointer to StudentID and you wished to reference StudentName, you'd just have to add the size of StudentID to your pointer, then your pointer would be pointing at StudentName