[hatari-devel] Hatari asserts on video interrupts when running under monochrome

Eero Tamminen oak at helsinkinet.fi
Sun Jan 10 18:49:05 CET 2010


Hi,

While testing GEMDOS changes with latest Hatari on TOS 1.4 and monochrome
screen, I'm seeing frequently asserts from interrupt handling while TOS is
idling in GEM (usually some time after showing a dialog if that's
important):

hatari: cycInt.c:377: CycInt_AddRelativeInterruptWithOffset: Assertion 
`CycleTime >= 0' failed.

Program received signal SIGABRT, Aborted.
[Switching to Thread 0xb79ad6b0 (LWP 3913)]
0xb7f7e424 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7f7e424 in __kernel_vsyscall ()
#1  0xb7c26640 in raise () from /lib/i686/cmov/libc.so.6
#2  0xb7c28018 in abort () from /lib/i686/cmov/libc.so.6
#3  0xb7c1f5be in __assert_fail () from /lib/i686/cmov/libc.so.6
#4  0x08053fe6 in CycInt_AddRelativeInterruptWithOffset (CycleTime=-24,
    CycleType=1, Handler=INTERRUPT_VIDEO_ENDLINE, CycleOffset=0)
    at cycInt.c:377
#5  0x08054017 in CycInt_AddRelativeInterrupt (CycleTime=-24, CycleType=1,
    Handler=INTERRUPT_VIDEO_ENDLINE) at cycInt.c:337
#6  0x0807e16c in Video_InterruptHandler_EndLine () at video.c:1609
#7  0x08087179 in m68k_go (may_quit=1) at newcpu.c:1751
#8  0x0806b444 in M68000_Start () at m68000.c:228
...
(gdb) up
#6  0x0807e16c in Video_InterruptHandler_EndLine () at video.c:1609
1609                    CycInt_AddRelativeInterrupt ( LineTimerBCycle - 
LineCycles + nCyclesPerLine,
(gdb) print LineTimerBCycle
$1 = 188
(gdb) print LineCycles
$2 = 436
(gdb) print nCyclesPerLine
$3 = 224
(gdb) print LineTimerBCycle - LineCycles + nCyclesPerLine
$4 = -24
     ^^^

Other video state:
(gdb) info locals
FrameCycles = 436
HblCounterVideo = 1
LineCycles = 436
PendingCycles = 24
(gdb) print nHBL
$6 = 0
(gdb) print nScanlinesPerFrame
$7 = 501
(gdb) print STRam[0xfffa03]
$10 = 4 '\004'
(gdb) print STRam[0xfffa03] & ( 1 << 3 )
$11 = 0


	- Eero



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