cc65/libsrc/lynx/irq.s

;
; 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
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00			`;`
			`; IRQ handling (Lynx version)`
			`;`

Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.export initirq, doneirq`
			`.import callirq`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.include "lynx.inc"`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
			`; ------------------------------------------------------------------------`

Renamed INITBSS to INIT and INIT to ONCE. 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. 2016-03-06 20:26:22 +00:00			`.segment "ONCE"`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
			`initirq:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`lda #<IRQStub`
			`ldx #>IRQStub`
			`sei`
			`sta INTVECTL`
			`stx INTVECTH`
			`cli`
			`rts`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
			`; ------------------------------------------------------------------------`

			`.code`

			`doneirq:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`; as Lynx is a console there is not much point in releasing the IRQ`
			`rts`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
			`; ------------------------------------------------------------------------`

Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`.segment "LOWCODE"`
Moved IRQ hooking / unhooking from startup code to constructor / destructor to avoid linking in the hooking / unhooking code (and callirq) for the majority of cc65 prorams not linking in interruptors. git-svn-id: svn://svn.cc65.org/cc65/trunk@5985 b7a2c559-68d2-44c3-8de9-860c34a00d81 2013-02-12 22:39:38 +00:00
			`IRQStub:`
Removed (pretty inconsistently used) tab chars from source code base. 2013-05-09 11:56:54 +00:00			`phy`
			`phx`
			`pha`
			`cld`
			`jsr callirq`
			`lda INTSET`
			`sta INTRST`
			`pla`
			`plx`
			`ply`
			`rti`