| Re: [hatari-devel] Correct cycles values? |
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Hi,
On perjantai 15 maaliskuu 2013, Thomas Huth wrote:
> schrieb Eero Tamminen <oak@xxxxxxxxxxxxxx>:
> > The context for these instructions is:
> > $e12bbe : addx.w d6,d6 0.00% (1, 4, 1)
> > $e12bc0 : move.b $be(a6,d6.w),$ffff(a5) 0.00% (1, 16, 0)
> > $e12bc6 : move.w d7,(a5) 0.00% (1, 272, 1)
> > $e12bc8 : adda.w a2,a0 0.00% (1, 4, 0)
> > $e12bca : adda.w a3,a1 0.00% (1, 8, 1)
> > $e12bcc : tas (a5) 0.00% (17, 4340, 0)
> > $e12bce : nop 0.00% (17, 68, 1)
>
> where does a5 point to? Could it be that TOS tries to start the blitter
> here? The blitter then might "steal" all those bus cycles so that it
> appears that the instruction itself takes very long.
---------------
WARNING: cycles 272 > 256:
$e12bc6 : move.w d7,(a5) 0.01% (1, 0, 0)
3. CPU breakpoint condition(s) matched 1 times.
pc = $e12bcc
CPU=$e12bcc, VBL=64, FrameCycles=142964, HBL=280, LineCycles=120, DSP=$51
> r
D0 0000000A D1 0000000C D2 00000000 D3 FFFF007F
D4 00000056 D5 00000000 D6 00000002 D7 003F8000
A0 00E49434 A1 003F8342 A2 00000000 A3 00000002
A4 00000000 A5 00FF8A3C A6 00008800 A7 000087B0
USP 00000000 ISP 000087B0 SFC 00000000 DFC 00000000
CACR 00003111 VBR 00000000 CAAR 00000000 MSP 00000000
T=00 S=1 M=0 X=0 N=1 Z=0 V=0 C=0 IMASK=3 STP=0
00E12BCC 4ad5 TAS.B (A5)
Next PC: 00e12bce
> n
Freed previous CPU profile buffers.
Allocated CPU profile buffer (27 MB).
WARNING: cycles 284 > 256:
$e12bcc : tas (a5) 0.00% (1, 0, 0)
---------------
It points to $FF8A3C, which as you guessed was blitter configuration
register. Thanks!
I'll increase that debug check to 512 cycles.
- Eero