[SOLVED] x86 and windows questation

[sagar474]

what is win32 application
then dose windows run in real mode or in protected mode
but in real mode we can use only 16 bit registers.

 

[FvM]

As the name suggests, it uses 32 bit registers (and wide memory space), which already answers your question.

Windows still provides a 16-Bit subsystem to support old real mode Windows and DOS applications. You can e.g. start the good old real mode DOS debugger in a command window and feel like 30 years back in time ...

 

[srizbf]

windows application is a 32bit application.
windows run in protected mode.

 

[sagar474]

if windows runs under protected mode how this program can work


TITLE ch04p8 This is the string
.MODEL small
.data

message db "This is the string",0dh,0ah,'$'

.code
main proc

mov ax,@data
mov ds,ax

mov ah,9
mov dx, offset message
int 21h
mov ax,4C00h
int 21h
main endp

end main

 

[srizbf]

under protected mode , it switches to 'virtual 86' mode for that program.