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Change the sematics of callirq and the existing interruptors: The interrupts

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must now return carry set if the interrupt has been handled, and carry clear
if not. The callirq routine will stop calling handlers with the first handler
that claims to have handled the interrupt. callirq will return the carry flag
to the caller as it came from the last interruptor called.


git-svn-id: svn://svn.cc65.org/cc65/trunk@3491 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz
2005-04-25 20:10:10 +00:00
parent 2a688ef6fd
commit cbdcab4fdb
6 changed files with 39 additions and 16 deletions
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9
libsrc/c64/c64-1351.s
View File

@@ -178,7 +178,7 @@ BOX: ldy #5
; MOVE: Move the mouse to a new position. The position is passed as it comes
; from the C program, that is: X on the stack and Y in a/x. The C wrapper will
; remove the parameter from the stack on return.
; No checks are done if the new position is valid (within the bounding box or
; No checks are done if the new position is valid (within the bounding box or
; the screen). No return code required.
;
@@ -269,7 +269,9 @@ IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioclts for now
;----------------------------------------------------------------------------
; IRQ: Irq handler entry point. Called as a subroutine but in IRQ context
; (so be careful).
; (so be careful). The routine MUST return carry set if the interrupt has been
; 'handled' - which means that the interrupt source is gone. Otherwise it
; MUST return carry clear.
;
IRQ: lda SID_ADConv1 ; Get mouse X movement
@@ -355,10 +357,11 @@ IRQ: lda SID_ADConv1 ; Get mouse X movement
; Move the mouse pointer to the new X pos
tya
jmp CMOVEY
jsr CMOVEY
; Done
clc ; Interrupt not handled
@SkipY: rts
; --------------------------------------------------------------------------

8
libsrc/c64/c64-hitjoy.s
View File

@@ -79,8 +79,10 @@ UNINSTALL:
rts
; ------------------------------------------------------------------------
; IRQ entry point. Is called from the C layer as a subroutine in the
; interrupt.
; IRQ entry point. Is called from the C layer as a subroutine in the
; interrupt. The routine MUST return carry set if the interrupt has been
; 'handled' - which means that the interrupt source is gone. Otherwise it
; MUST return carry clear.
IRQ: ; cia 2 setup
@@ -156,6 +158,8 @@ fire:
lda #0
sta $dc04
; We do never "handle" the interrupt, we use it just as a timer.
clc
rts
; ------------------------------------------------------------------------

9
libsrc/c64/c64-joymouse.s
View File

@@ -269,7 +269,9 @@ IOCTL: lda #<MOUSE_ERR_INV_IOCTL ; We don't support ioclts for now
;----------------------------------------------------------------------------
; IRQ: Irq handler entry point. Called as a subroutine but in IRQ context
; (so be careful).
; (so be careful). The routine MUST return carry set if the interrupt has been
; 'handled' - which means that the interrupt source is gone. Otherwise it
; MUST return carry clear.
;
IRQ: lda #$7F
@@ -381,9 +383,10 @@ IRQ: lda #$7F
; Move the mouse pointer to the new X pos
tya
jmp CMOVEY
jsr CMOVEY
; Done
@SkipY: rts
@SkipY: clc ; Interrupt not handled
rts