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46 lines
840 B
ArmAsm
46 lines
840 B
ArmAsm
;
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; IRQ handling (Lynx version)
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;
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.export initirq, doneirq
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.import callirq
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.include "lynx.inc"
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; ------------------------------------------------------------------------
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.segment "ONCE"
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initirq:
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lda #<IRQStub
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ldx #>IRQStub
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sei
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sta INTVECTL
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stx INTVECTH
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cli
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rts
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; ------------------------------------------------------------------------
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.code
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doneirq:
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; as Lynx is a console there is not much point in releasing the IRQ
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rts
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; ------------------------------------------------------------------------
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.segment "LOWCODE"
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IRQStub:
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phy
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phx
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pha
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jsr callirq
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lda INTSET
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sta INTRST
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pla
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plx
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ply
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rti
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