mirror of
https://github.com/cc65/cc65.git
synced 2024-08-17 19:29:12 +00:00
The way we want to use the INITBSS segment - and especially the fact that it won't have the type bss on all ROM based targets - means that the name INITBSS is misleading. After all INIT is the best name from my perspective as it serves several purposes and therefore needs a rather generic name. Unfortunately this means that the current INIT segment needs to be renamed too. Looking for a short (ideally 4 letter) name I came up with ONCE as it contains all code (and data) accessed only once during initialization.
47 lines
852 B
ArmAsm
47 lines
852 B
ArmAsm
;
|
|
; IRQ handling (Lynx version)
|
|
;
|
|
|
|
.export initirq, doneirq
|
|
.import callirq
|
|
|
|
.include "lynx.inc"
|
|
|
|
; ------------------------------------------------------------------------
|
|
|
|
.segment "ONCE"
|
|
|
|
initirq:
|
|
lda #<IRQStub
|
|
ldx #>IRQStub
|
|
sei
|
|
sta INTVECTL
|
|
stx INTVECTH
|
|
cli
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
|
|
.code
|
|
|
|
doneirq:
|
|
; as Lynx is a console there is not much point in releasing the IRQ
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
|
|
.segment "LOWCODE"
|
|
|
|
IRQStub:
|
|
phy
|
|
phx
|
|
pha
|
|
cld
|
|
jsr callirq
|
|
lda INTSET
|
|
sta INTRST
|
|
pla
|
|
plx
|
|
ply
|
|
rti
|