void
_start(void)
{
// read in the video buffer address
// it assumes that the MMU mappings haven't changed
// and the buffer is in the 4kb SRAM
volatile unsigned *LCDSADDR1 = (unsigned *)0x7300014;
__display_buf = (*LCDSADDR1 & 0xffff) * 2 + 0x7f00000;
// set the screen height for the <hpstdio.h> module
extern int __scr_h;
__scr_h = (sys_lcdgetheight() == 64)? 10: 13;
// declare locally to reduce executable size
unsigned state_buffer[4];
__exit_stk_state = state_buffer;
// turn interrupts off so we can use the screen
sys_intOff();
// will return 0 when exitting
if (_exit_save((unsigned *)state_buffer)) {
show_system_info();
__exit_cleanup();
}
// turn interrupts on for the OS
sys_intOn();
}
/*
* Normal program termination
*/
void exit(int rv)
{
/* Perform exit-specific cleanup (atexit and on_exit) */
LOCK;
if (__exit_cleanup) {
__exit_cleanup(rv);
}
UNLOCK;
/* If we are using stdio, try to shut it down. At the very least,
* this will attempt to commit all buffered writes. It may also
* unbuffer all writable files, or close them outright.
* Check the stdio routines for details. */
if (_stdio_term)
_stdio_term();
_exit(rv);
}
void
_start(void)
{
// read in the video buffer address
// it assumes that the MMU mappings haven't changed
// and the buffer is in the 4kb SRAM
volatile unsigned *LCDSADDR1 = (unsigned *)0x7300014;
__display_buf = (*LCDSADDR1 & 0xffff) * 2 + 0x7f00000;
// set the screen height for the <hpstdio.h> module
extern int __scr_h;
__scr_h = 11;
// declare locally to reduce executable size
int state_buffer[4], lcd_buffer[17];
__exit_stk_state = state_buffer;
// turn interrupts off so we can use the screen
sys_intOff();
// save current hardware state
sys_lcdsave(lcd_buffer);
// slow down the clock to save power
sys_slowOn();
// will return 0 when exitting
if (_exit_save((unsigned *)state_buffer)) {
main();
__exit_cleanup();
}
// restore original hardware values
sys_slowOff();
sys_lcdrestore(lcd_buffer);
// turn interrupts on for the OS
sys_intOn();
}
