flat assembler
> DOS > The function 48h fails when I want to allocate some memory |
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The function 48h fails when I want to allocate some memory:
Code:
format MZ
push cs
pop ds
mov ah,048h
mov bx,10 ;Allocate 10*16 bytes
int 21h
jnb @f ;Allocation successfull
mov dx,errmsg
mov ah,9
int 21h
@@:
mov ax,4C00h
int 21h
errmsg db 'Error',24h
Setting the carry flag whick means failure... What can be the reason? Are there different methods to allocate memory under DOS? _________________ Code it... That's all... |
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17 Jun 2003, 11:17 |
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From the fasm documentation (section 2.4.1):
Quote: "heap" directive should be followed by a 16-bit value defining maximum size With default heap size all conventional memory gets allocated when your program is loaded and thus you can't allocate more. Setting heap to zero should help. |
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17 Jun 2003, 11:22 |
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Thanks Privalov,it works now.
I have an other question,is there an eqivalent instruction to adjust the heapsize for other assemblers such as tasm and masm? _________________ Code it... That's all... |
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17 Jun 2003, 11:43 |
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Yes, this is usually one of the switches for the linker.
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17 Jun 2003, 12:27 |
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Thanks Privalov.Everything works fine.
_________________ Code it... That's all... |
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18 Jun 2003, 10:08 |
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