Subject: Re: [stella] Stella Debugger RFC From: Erik Mooney <erik@xxxxxxxxxx> Date: Wed, 15 Jun 2005 18:52:51 -0400 |
On Wed Jun 15 16:34 , 'B. Watson' <atari@xxxxxxxxxxxxxx> sent: >Also, isn't there a "trick" where you use JSR to strobe two registers >faster than normally possible? Hrm, or is that RTS? JSR is used for that trick. The "termination" of the subroutine would be caught by the target-PC check, since the target address for the JSR is just the immediately following instruction. Alternatively, you could explicitly detect the trick being used by checking if S < $80. If it is, just single-step past the JSR and don't initiate a "trace over". (The trick works by setting S to point to one of the RESxx registers, then the JSR strobes that register and the register immediately below it only one cycle apart.) Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://stella.biglist.com
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