Problem with "dt" !

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DarkLight

Joined: 21 Feb 2009
Posts: 10
Location: Armenia

DarkLight

Why FASM report an error in this code:

Code:

format MZ
entry code_seg:start; set entry point
stack 256
segment data_seg
; add your data here!
per_1 db 2,3,4,6,8,2
per_3 dt 9875645
segment code_seg
start:
; set segment registers:
mov ax,data_seg
mov ds,ax
mov es,ax
; add your code here
mov ax,4c00h
int 21h

Here is a error message:

Code:

aram@linux-39o6:~/Documents> fasm PRG_8_2-DOS.asm
flat assembler  version 1.67.33  (16384 kilobytes memory)
PRG_8_2-DOS.asm [7]:
per_3 dt 9875645
error: invalid operand.

With per_3 dt 9,8,7, ... there is no error message.

22 Feb 2009, 15:08

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system

revolution

Use a decimal point:

Code:

9875645.0

22 Feb 2009, 15:10

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4633
Location: Argentina

LocoDelAssembly

Quote:

With per_3 dt 9,8,7, ... there is no error message.

I have error message with FASMW.

22 Feb 2009, 15:16

DarkLight

Joined: 21 Feb 2009
Posts: 10
Location: Armenia

DarkLight

strange, very strange...

22 Feb 2009, 15:28

DarkLight

Joined: 21 Feb 2009
Posts: 10
Location: Armenia

DarkLight

LocoDelAssembly wrote:

Quote:

With per_3 dt 9,8,7, ... there is no error message.

I have error message with FASMW.

Try "per_3 dt 9,9,9,9,9,9" ...

22 Feb 2009, 15:35

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system

revolution

Looks like a fasm bug to me.

dt 9,9 ; ---> 09 00 00 00 00 00 00 00 09 00

22 Feb 2009, 15:41

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system

revolution

fasm manual wrote:

dt accepts the word and quad word value separated with colon, the quad word is stored first.

Looks like a comma separator also works.

22 Feb 2009, 15:44

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 7797
Location: Kraków, Poland

Tomasz Grysztar

Yup, it's a bug.
The only valid syntax for this should be dt 9:9

22 Feb 2009, 15:45

Tomasz Grysztar

Joined: 16 Jun 2003
Posts: 7797
Location: Kraków, Poland

Tomasz Grysztar

OK, the new release with this minor fix is done.

22 Feb 2009, 16:14

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system

revolution

Look at that folks, less than half an hour after confirmation of the bug and it is fixed.

v1.67.34 is there.

22 Feb 2009, 16:20

LocoDelAssembly
Your code has a bug

Joined: 06 May 2005
Posts: 4633
Location: Argentina

LocoDelAssembly

haha, I see that an even number of arguments was required to trigger the bug then, I tested "per_3 dt 9,8,7".

22 Feb 2009, 19:18

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 17669
Location: In your JS exploiting you and your system

revolution

LocoDelAssembly: You didn't do enough testing Wink

22 Feb 2009, 19:29

DarkLight

Joined: 21 Feb 2009
Posts: 10
Location: Armenia

DarkLight

Great !
Thank you!

23 Feb 2009, 15:44

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