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This commit is contained in:
Greg King
2015-10-02 10:50:22 -04:00
committed by Oliver Schmidt
parent 203200e259
commit b5d939c858
23 changed files with 142 additions and 159 deletions
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40
libsrc/pce/crt0.s
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@@ -1,8 +1,8 @@
;
; Startup code for cc65 (PCEngine version)
;
; by Groepaz/Hitmen <groepaz@gmx.net>
; based on code by Ullrich von Bassewitz <uz@cc65.org>
; by Groepaz/Hitmen <groepaz@gmx.net>,
; based on code by Ullrich von Bassewitz <uz@cc65.org>.
;
; 2018-02-11, Greg King
;
@@ -28,16 +28,12 @@
; ------------------------------------------------------------------------
; Place the startup code in a special segment.
.segment "STARTUP"
start:
; Set up the CPU and System-IRQ
.segment "STARTUP"
; Initialize CPU
sei
start: sei
nop
csh ; Set high speed CPU mode
csh ; Set high-speed CPU mode
nop
; Set up stack and memory mapping
@@ -64,7 +60,7 @@ start:
inc a
@L1: tam #%01000000 ; $C000-$DFFF = ROM bank 3 (32K) or 1 (16K)
;lda #$00 ; (The reset default)
;tam #%10000000 ; $E000-$FFFF hucard/syscard bank 0
;tam #%10000000 ; $E000-$FFFF Hucard/Syscard bank 0
; Initialize hardware
stz TIMER_CTRL ; Timer off
@@ -72,7 +68,7 @@ start:
sta IRQ_MASK ; Interrupts off
stz IRQ_STATUS ; Acknowledge timer
; FIXME; i dont know why the heck this one doesnt work when called from a constructor :/
; FIXME; I don't know why the heck this one doesn't work when called from a constructor. :/
.import vdc_init
jsr vdc_init
@@ -96,24 +92,22 @@ start:
; Call module constructors
jsr initlib
cli ; allow IRQ only after constructors have run
cli ; allow IRQ only after constructors have run
; Pass an empty command line
jsr push0 ; argc
jsr push0 ; argv
ldy #4 ; Argument size
jsr _main ; Call the users code
jsr _main ; Call the user's code
; Call module destructors. This is also the _exit entry.
_exit:
jsr donelib ; Run module destructors
_exit: jsr donelib ; Run module destructors
; reset the PCEngine (start over)
jmp start
_nmi:
rti
_nmi: rti
.export initmainargs
initmainargs:
@@ -122,10 +116,10 @@ initmainargs:
; ------------------------------------------------------------------------
; hardware vectors
; ------------------------------------------------------------------------
.segment "VECTORS"
.segment "VECTORS"
.word IRQStub ; $fff6 IRQ2 (External IRQ, BRK)
.word IRQStub ; $fff8 IRQ1 (VDC)
.word IRQStub ; $fffa Timer
.word _nmi ; $fffc NMI
.word start ; $fffe reset
.word IRQStub ; $FFF6 IRQ2 (External IRQ, BRK)
.word IRQStub ; $FFF8 IRQ1 (VDC)
.word IRQStub ; $FFFA Timer
.word _nmi ; $FFFC NMI
.word start ; $FFFE reset