Ok, I've been trying different tutorials/methods of learning asm and right now I'm reading Dr. Paul Carters tutorial and using NASM and DJGPP to compile. I just got into the conditional/jump section and I wanted to test how the jumps work and ran into a problem. The read_char macro seems to never run and when I look into the registers EAX always has an ascii 'A' (linefeed) in it after the read_char is suppost to run. I can't even enter anything a 'y' or 'n'. I warn you I'm a beginner, and this is a corny test program.
%include "asm_io.inc"
segment .data
label1 db "Enter your age: ", 0
label2 db "Are your really ", 0
label3 db " (y or n): ", 0
label4 db "Wow, your old!", 0
label5 db "Ok, sorry!", 0
segment .bss
age resd 1
yorn resd 1
segment .text
global _asm_main
_asm_main:
enter 0,0
pusha
mov eax, label1
call print_string
call read_int
mov dword [age], eax
mov eax, label2
call print_string
mov eax, dword [age]
call print_int
mov eax, label3
call print_string
mov eax, 0
call read_char ; <-- will not get input
mov dword [yorn], eax
cmp dword [yorn], 'y'
jnz no
call print_nl
mov eax, label4
call print_string
popa
mov eax, 0
leave
ret
no:
call print_nl
mov eax, label5
call print_string
popa
mov eax, 0
leave
retAny comments or suggestions on how I can make things easier or avoid problems are very welcome. This has been driving me nutts:mad:
Also, I have tried commenting every line before the read_char untill the first call print_string and when I get to the read_int line and comment it also, then it works.