sta.w HMP0,X

[vdub_bobby]

Does anybody know why sta.w HMP0,X doesn't work in Stella or z26? It doesn't write to HMP0,X at all.

 

On the other hand, sta $0120,X does work just fine...

 

EDIT: It appears to be a problem with DASM, not z26 or Stella. DASM turns sta.w HMP0,X into $8d $20 $00 which is really sta $0020

 

But dasm does turn sta $0120,X into $9d $20 $01, which will work.

 

I also couldn't force sta $0020,X to compile how I wanted, either.

 

I guess I should have read the docs a little better.

Edited August 3, 2005 by vdub_bobby

[supercat]

EDIT: It appears to be a problem with DASM, not z26 or Stella.  DASM turns sta.w HMP0,X into $8d $20 $00 which is really sta $0020

 

The .w forces DASM to use absolute (non-indexed) addressing mode, regardless of any indicated addressing mode indications to the contrary. I just add 256 or 8192 to the address and be done with it.

[Thomas Jentzsch]

sta.wx HMP0,x

[vdub_bobby]

sta.wx HMP0,x

904279[/snapback]

Thank you! I looked at the docs for dasm and I couldn't find anything. Is it in the docs or should I be looking somewhere else?

[Thomas Jentzsch]

Thank you!  I looked at the docs for dasm and I couldn't find anything.  Is it in the docs or should I be looking somewhere else?

EXTENSIONS:

   FORCE extensions are used to force an addressing mode.  In some cases,
   you can optimize the assembly to take fewer passes by telling it the
   addressing mode.  Force extensions are also used with DS,DC, and DV
   to determine the element size.  NOT ALL EXTENSIONS APPLY TO ALL
   PROCESSORS!

 example:    lda.z   charlie

 i   -implied
 ind -indirect word
 0   -implied
 0x  -implied indexing (0,x)
 0y  -implied indexing (0,y)
 b   -byte address
 bx  -byte address indexed x
 by  -byte address indexed y
 w   -word address
 wx  -word address indexed x
 wy  -word address indexed y
 l   -longword (4 bytes) (DS/DC/DV)
 r   -relative
 u   -uninitialized (SEG) 

[vdub_bobby]

EXTENSIONS:

   FORCE extensions are used to force an addressing mode.  In some cases,
   you can optimize the assembly to take fewer passes by telling it the
   addressing mode.  Force extensions are also used with DS,DC, and DV
   to determine the element size.  NOT ALL EXTENSIONS APPLY TO ALL
   PROCESSORS!

 example:    lda.z   charlie

 i   -implied
 ind -indirect word
 0   -implied
 0x  -implied indexing (0,x)
 0y  -implied indexing (0,y)
 b   -byte address
 bx  -byte address indexed x
 by  -byte address indexed y
 w   -word address
 wx  -word address indexed x
 wy  -word address indexed y
 l   -longword (4 bytes) (DS/DC/DV)
 r   -relative
 u   -uninitialized (SEG) 

905213[/snapback]

Again, thanks.