; ; New Stub for Paolo System .export __STARTUP__ : absolute = 1 ; Mark as startup .import _irq .import _main .include "zeropage.inc" TOPMEM := $1FFF ; top of RAM ; sp = $FE ; stack pointer .segment "STARTUP" ; ------------------------------------------------------------------------ ; Actual code _coldstart: ; reset vector points here! sei cld ldx #$ff ;set Stack Pointer at $01FF txs lda #TOPMEM sta $FF ; High byte cli jsr _main brk ; END Sim with BRK optn stop: jmp stop ; endless loop NMIjump: Interrupt: INTret: RTI ; Null Interrupt return .segment "VECTORS" ; 65C02 Firmware Notes ; ; NMIjmp = $FFFA ; RESjmp = $FFFC ; INTjmp = $FFFE .word NMIjump .word _coldstart .word _irq .bss