2 * crt0.c - SDCC pic16 port runtime start code
5 * Converted for SDCC and pic16 port
6 * by Vangelis Rokas (vrokas@otenet.gr)
8 * based on Microchip MPLAB-C18 startup files
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 * In other words, you are welcome to use, share and improve this program.
25 * You are forbidden to forbid anyone else to use, share and improve
26 * what you give them. Help stamp out software-hoarding!
36 /* external reference to the user's main routine */
37 extern void main (void);
39 /* prototype for the startup function */
40 void _entry (void) _naked interrupt 0;
41 void _startup (void) _naked;
45 * entry function, placed at interrupt vector 0 (RESET)
48 void _entry (void) _naked interrupt 0
50 _asm goto __startup _endasm;
54 void _startup (void) _naked
57 // Initialize the stack pointer
60 clrf _TBLPTRU, 0 // 1st silicon doesn't do this on POR
62 // initialize the flash memory access configuration. this is harmless
63 // for non-flash devices, so we do it on all parts.
69 /* Call the user's main routine */
73 /* return from main will lock up */