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Bug in the ez80

Posted by Nobody/Anonymous on March 6, 2007
The timer_isr function implemented in C change the CPU flags before the assembly code save the "af" registers.
The timer_isr must be written in assembler to come around(for ez80L92):

.assume adl=1
.def _timer_isr
.ref _vTaskIncrementTick
.ref _vTaskSwitchContext
.ref _pxCurrentTCB



push af ; save flags
in0 a,(80h)
push bc
push de
push hl
push iy
ex af,af'
push af
push bc
push de
push hl
ld ix,0
add ix,sp
ld hl,(_pxCurrentTCB)
ld (hl),ix

CALL _vTaskIncrementTick

CALL _vTaskSwitchContext


ld hl,(_pxCurrentTCB)
ld hl,(hl)
ld sp,hl
pop hl
pop de
pop bc
pop af
ex af,af'
pop iy
pop hl
pop de
pop bc
pop af
pop ix

Best regards:
Ivar Jeppesen
Embedit A/S

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