Re: Calling all DOS-heads

From: Jim Brain <>
Date: Fri, 30 Mar 2012 18:41:24 -0500
Message-ID: <>
On 3/30/2012 2:37 PM, Ingo Korb wrote:

[rant snipped]
> If you want to figure out what the CPU actually does I recommend adding
> a few of the lowest address lines (A0-A2 should be enough, A0-A3 are a
> bit more convenient) to the logic analyzer trace and possibly SYNC to
> see which cycles are instruction fetches. Tracing IRQ may show if the
> interrupt is accidentally cleared before it is handeled - but the only
> access to $1801 in a stock rom is in the subroutine that sets $7c and I
> really hope you're not experimenting with a drive with any kind of
> parallel speeder in it.
I'll see about adding the traces to the output.  The resulting output 
will no doubt be too large for a screen shot, so I'll have to figure out 
another way to show the information.


       Message was sent through the cbm-hackers mailing list
Received on 2012-03-31 00:00:22

Archive generated by hypermail 2.2.0.