cc65/libsrc/atari5200/crt0.s

;
; Startup code for cc65 (Atari5200 version)
;
; Christian Groessler (chris@groessler.org), 2014
;

        .export         _exit, start
        .export         __STARTUP__ : absolute = 1      ; Mark as startup
        .import         __RAM_START__, __RAM_SIZE__
        .import         __RESERVED_MEMORY__

        .import         initlib, donelib, callmain
        .import         zerobss, copydata

        .include        "zeropage.inc"

start:

; Clear the BSS data.

        jsr     zerobss

; Initialize the data.
        jsr     copydata

; Set up the stack.

        lda     #<(__RAM_START__ + __RAM_SIZE__ - __RESERVED_MEMORY__)
        ldx     #>(__RAM_START__ + __RAM_SIZE__ - __RESERVED_MEMORY__)
        sta     sp
        stx     sp+1            ; Set argument stack ptr

; Call the module constructors.

        jsr     initlib

; Push the command-line arguments; and, call main().

        jsr     callmain

; Call the module destructors. This is also the exit() entry.

_exit:  jsr     donelib         ; Run module destructors

; A 5200 program isn't supposed to exit.

halt:   jmp     halt
first changes for atari5200 target 2014-03-01 16:20:09 +00:00			`;`
			`; Startup code for cc65 (Atari5200 version)`
			`;`
atari5200 update: simple conio "hello world" works now 2014-04-25 01:02:44 +00:00			`; Christian Groessler (chris@groessler.org), 2014`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00			`;`

			`.export _exit, start`
			`.export __STARTUP__ : absolute = 1 ; Mark as startup`
use __RESERVED_MEMORY__ to reserve memory for the default 20x24 text screen 2014-03-13 01:36:10 +00:00			`.import __RAM_START__, __RAM_SIZE__`
			`.import __RESERVED_MEMORY__`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
			`.import initlib, donelib, callmain`
			`.import zerobss, copydata`

			`.include "zeropage.inc"`

			`start:`

Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Clear the BSS data.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
			`jsr zerobss`

Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Initialize the data.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00			`jsr copydata`

Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Set up the stack.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
use __RESERVED_MEMORY__ to reserve memory for the default 20x24 text screen 2014-03-13 01:36:10 +00:00			`lda #<(__RAM_START__ + __RAM_SIZE__ - __RESERVED_MEMORY__)`
Use AX paradigm for stack initalization. 2016-03-07 00:44:19 +00:00			`ldx #>(__RAM_START__ + __RAM_SIZE__ - __RESERVED_MEMORY__)`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00			`sta sp`
Use AX paradigm for stack initalization. 2016-03-07 00:44:19 +00:00			`stx sp+1 ; Set argument stack ptr`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Call the module constructors.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
			`jsr initlib`

Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Push the command-line arguments; and, call main().`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
			`jsr callmain`

Refined the comments in the target start-up files. Fixed typo errors. Made the comments consistent across all those files. 2014-08-23 18:05:36 +00:00			`; Call the module destructors. This is also the exit() entry.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
			`_exit: jsr donelib ; Run module destructors`

atari5200 update: simple conio "hello world" works now 2014-04-25 01:02:44 +00:00			`; A 5200 program isn't supposed to exit.`
first changes for atari5200 target 2014-03-01 16:20:09 +00:00
libsrc/atari5200/crt0.s: fix formatting 2021-05-20 23:45:55 +00:00			`halt: jmp halt`