[A89] Re: functions addresses

To: assembly-89@lists.ticalc.org
Subject: [A89] Re: functions addresses
From: Joel Thompson <joelt49@yahoo.com>
Date: Tue, 4 Jun 2002 09:36:07 -0700 (PDT)
In-Reply-To: <000001c20b8c$44f6b0e0$0100a8c0@silverxp01>
Reply-To: assembly-89@lists.ticalc.org


Also, in the TIGCC docs, for ROM calls, it will say a number. Multiply that number by 4 and add it to 0xc8, and you will get its address in the jump table. For example:

move.l $c8,a5

move.l ScreenClear*4(a5),a0

jsr (a0)

In that example, it loads the address of the jump table into a5, the address of ClrScr (ScreenClear) into a0, and jumps to it. Loading the jump table address into a5 is the same a OPTIMIZE_ROM_CALLS. I recommend reading Kevin's nostub ASM programming tutorial here.



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Follow-Ups:

[A89] Re: functions addresses

From: "R.A." <funkaster@mac.com>

References:

[A89] Re: functions addresses

From: "John David Ratliff" <jdratlif@cs.indiana.edu>