Re: A92: 256K & interrupt routines


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Re: A92: 256K & interrupt routines




can you give a schematic to me of teh 256k upgrade and a patch over e-mail? 
Or I can visit a site too! Thanks

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> From: Jean-Jacques MICHEL <jjm@han.daewoo.fr>
> To: "'assembly-92@lists.ticalc.org'" <assembly-92@lists.ticalc.org>
> Subject: A92: 256K & interrupt routines
> Date: Thu, 23 Oct 1997 10:59:38 +0100
> 
> I have just upgraded my TI92 to 256K (No need to ask me how, this is not
the question !)
> 
> I also made a small patch in order to have Fargo run with this upgrade
> (Once more, this is not the reason for my question !)
> 
> I noticed that some programs were not running, and looking at the SPRITE
example,
> I suspect that this problem is related to the way interruption re-routing
is done
> in some programs.
> 
> Could somebody justify the use of :
> 
> 	move.w	#$2700,sr
> 	move.l	($020064),old_int_1
> 	move.l	#int_1,($020064)
> 	move.w	#$2000,sr
> 
> instead of
> 
> 	move.w	#$2700,sr
> 	move.l	($64),old_int_1
> 	move.l	#int_1,($64)
> 	move.w	#$2000,sr
> 
> to save and re-route interrupt $64 ????
> 
> Because with 128K more, $20064 is a RAM position, not the $64 interrupt
vector !!!
> 
> 											JJM
> 
>