mirror of
https://github.com/cc65/cc65.git
synced 2024-11-19 06:31:31 +00:00
419eb700b5
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.
49 lines
856 B
ArmAsm
49 lines
856 B
ArmAsm
;
|
|
; IRQ handling (PCE version)
|
|
;
|
|
|
|
.export initirq, doneirq, IRQStub
|
|
|
|
.import __INTERRUPTOR_COUNT__, callirq_y
|
|
|
|
.include "pce.inc"
|
|
.include "extzp.inc"
|
|
|
|
; ------------------------------------------------------------------------
|
|
.segment "ONCE"
|
|
|
|
; a constructor
|
|
;
|
|
initirq:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
.code
|
|
|
|
; a destructor
|
|
;
|
|
doneirq:
|
|
rts
|
|
|
|
; ------------------------------------------------------------------------
|
|
|
|
IRQStub:
|
|
phy
|
|
|
|
; Save the display-source flags (and, release the interrupt).
|
|
;
|
|
ldy a:VDC_CTRL
|
|
sty vdc_flags
|
|
|
|
ldy #<(__INTERRUPTOR_COUNT__ * 2)
|
|
beq @L1
|
|
phx
|
|
pha
|
|
|
|
jsr callirq_y
|
|
|
|
pla
|
|
plx
|
|
@L1: ply
|
|
rti
|