add posixdirent.s by Stefan Haubenthal

[cc65] / libsrc / lynx / crt0.s

diff --git a/libsrc/lynx/crt0.s b/libsrc/lynx/crt0.s
index 1d8e19de3f131bd5cafb6e7246b058bcf4dbe679..397d85bb35ec1ce739e7fb562d012166b1091110 100644 (file)
--- a/libsrc/lynx/crt0.s
+++ b/libsrc/lynx/crt0.s
@@ -13,22 +13,22 @@
 ; code structure.  The C stack is located at the end of the RAM memory
 ; segment and grows downward.  Bastian Schick's executable header is put
 ; on the front of the fully linked binary (see EXEHDR segment.)
-;
-; This must be the *first* file on the linker command line
 ;
 
        .include        "lynx.inc"
        .export         _exit
-       .exportzp       __iodat,__iodir,__viddma,__sprsys
+        .export         __STARTUP__ : absolute = 1      ; Mark as startup
 
-       .import         initlib, donelib
+       .import         callirq, initlib, donelib
        .import         zerobss
        .import         callmain
        .import         _main
-       .import         __CODE_LOAD__, __BSS_LOAD__
-       .import         __RAM_START__, __RAM_SIZE__
+       .import         __BSS_LOAD__
+       .import         __INTERRUPTOR_COUNT__
+       .import         __RAM_START__, __RAM_SIZE__, __STACKSIZE__
 
        .include        "zeropage.inc"
+        .include        "extzp.inc"
 
 
 ; ------------------------------------------------------------------------
@@ -36,8 +36,8 @@
 
        .segment "EXEHDR"
        .word   $0880
-       .byte   >__CODE_LOAD__, <__CODE_LOAD__
-       .byte   >__BSS_LOAD__, <(__BSS_LOAD__ - 1)
+       .dbyt   __RAM_START__
+               .dbyt   __BSS_LOAD__ - __RAM_START__ + 10
        .byte   $42,$53
        .byte   $39,$33
 
@@ -54,17 +54,6 @@ MikeyInitReg:   .byte $00,$01,$08,$09,$20,$28,$30,$38,$44,$50,$8a,$8b,$8c,$92,$9
 MikeyInitData:  .byte $9e,$18,$68,$1f,$00,$00,$00,$00,$00,$ff,$1a,$1b,$04,$0d,$29
 
 
-; ------------------------------------------------------------------------
-; mikey and suzy shadow registers
-
-       .segment "EXTZP" : zeropage
-
-__iodat:    .res    1
-__iodir:    .res    1
-__viddma:   .res    1
-__sprsys:   .res    1
-
-
 ; ------------------------------------------------------------------------
 ; Actual code
 
@@ -105,9 +94,9 @@ __sprsys:   .res    1
 
 ; setup the stack
 
-       lda     #<(__RAM_START__ + __RAM_SIZE__)
+       lda     #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
        sta     sp
-       lda     #>(__RAM_START__ + __RAM_SIZE__)
+       lda     #>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
        sta     sp+1
 
 ; Init Mickey
@@ -144,9 +133,21 @@ sloop:  ldy     SuzyInitReg,x
 
        jsr     zerobss
 
+; If we have IRQ functions, set the IRQ vector
+; as Lynx is a console there is not much point in releasing the IRQ
+
+        lda     #<__INTERRUPTOR_COUNT__
+       beq     NoIRQ1
+       lda     #<IRQStub
+       ldx     #>IRQStub
+       sei
+       sta     INTVECTL
+       stx     INTVECTH
+       cli
+
 ; Call module constructors
 
-       jsr     initlib
+NoIRQ1: jsr     initlib
 
 ; Push arguments and call main
 
@@ -161,3 +162,17 @@ _exit:  jsr     donelib         ; Run module destructors
 noret:  bra     noret
 
 
+       .segment "CODE"
+IRQStub:
+       phy
+       phx
+       pha
+       cld
+               jsr     callirq
+       lda     INTSET
+       sta     INTRST
+       pla
+       plx
+       ply
+       rti
+