diff --git a/libsrc/apple2/callmain.s b/libsrc/apple2/callmain.s new file mode 100644 index 0000000000..71a8b56117 --- /dev/null +++ b/libsrc/apple2/callmain.s @@ -0,0 +1,75 @@ +; +; Ullrich von Bassewitz, 2003-03-07 +; +; Push arguments and call main() +; + + + .export callmain, _exit + .export __argc, __argv + + .import _main, pushax, done, donelib + .import zpsave, rvsave, reset + + .include "zeropage.inc" + .include "apple2.inc" + + +;--------------------------------------------------------------------------- +; Setup the stack for main(), then jump to it + +callmain: + lda __argc + ldx __argc+1 + jsr pushax ; Push argc + + lda __argv + ldx __argv+1 + jsr pushax ; Push argv + + ldy #4 ; Argument size + jsr _main + + ; Avoid a re-entrance of donelib. This is also the exit() entry. +_exit: ldx #exit + jsr reset ; Setup RESET vector + + ; Switch in LC bank 2 for R/O in case it was switched out by a RESET. + bit $C080 + + ; Call the module destructors. + jsr donelib + + ; Switch in ROM. + bit $C082 + + ; Restore the original RESET vector. +exit: ldx #$02 +: lda rvsave,x + sta SOFTEV,x + dex + bpl :- + + ; Copy back the zero-page stuff. + ldx #zpspace-1 +: lda zpsave,x + sta sp,x + dex + bpl :- + + ; ProDOS TechRefMan, chapter 5.2.1: + ; "System programs should set the stack pointer to $FF at the + ; warm-start entry point." + ldx #$FF + txs ; Re-init stack pointer + + ; We're done + jmp done + +;--------------------------------------------------------------------------- +; Data + +.data +__argc: .word 0 +__argv: .addr 0 diff --git a/libsrc/apple2/crt0.s b/libsrc/apple2/crt0.s index c129cdbf89..42e26c27be 100644 --- a/libsrc/apple2/crt0.s +++ b/libsrc/apple2/crt0.s @@ -4,10 +4,11 @@ ; Startup code for cc65 (Apple2 version) ; - .export _exit, done, return + .export done, return + .export zpsave, rvsave, reset .export __STARTUP__ : absolute = 1 ; Mark as startup - .import initlib, donelib + .import initlib, _exit .import zerobss, callmain .import __ONCE_LOAD__, __ONCE_SIZE__ ; Linker generated .import __LC_START__, __LC_LAST__ ; Linker generated @@ -33,44 +34,7 @@ jsr zerobss ; Push the command-line arguments; and, call main(). - jsr callmain - - ; Avoid a re-entrance of donelib. This is also the exit() entry. -_exit: ldx #exit - jsr reset ; Setup RESET vector - - ; Switch in LC bank 2 for R/O in case it was switched out by a RESET. - bit $C080 - - ; Call the module destructors. - jsr donelib - - ; Switch in ROM. - bit $C082 - - ; Restore the original RESET vector. -exit: ldx #$02 -: lda rvsave,x - sta SOFTEV,x - dex - bpl :- - - ; Copy back the zero-page stuff. - ldx #zpspace-1 -: lda zpsave,x - sta sp,x - dex - bpl :- - - ; ProDOS TechRefMan, chapter 5.2.1: - ; "System programs should set the stack pointer to $FF at the - ; warm-start entry point." - ldx #$FF - txs ; Re-init stack pointer - - ; We're done - jmp done + jmp callmain ; ------------------------------------------------------------------------