1 #include <sys/io.h> 2 #include <fs.h> 3 #include <com32.h> 4 5 #include "bios.h" 6 #include "graphics.h" 7 #include <syslinux/video.h> 8 9 /* 10 * Write a single character in AL to the console without 11 * mangling any registers; handle video pages correctly. 12 */ 13 __export void writechr(char data) 14 { 15 com32sys_t ireg, oreg; 16 17 memset(&ireg, 0, sizeof ireg); 18 memset(&oreg, 0, sizeof oreg); 19 write_serial(data); /* write to serial port if needed */ 20 21 if (UsingVGA & 0x8) 22 syslinux_force_text_mode(); 23 24 if (!(DisplayCon & 0x1)) 25 return; 26 27 ireg.eax.b[0] = data; 28 ireg.eax.b[1] = 0xE; 29 ireg.ebx.b[0] = 0x07; /* attribute */ 30 ireg.ebx.b[1] = *(uint8_t *)BIOS_page; /* current page */ 31 __intcall(0x10, &ireg, &oreg); 32 } 33 34 void pm_writechr(com32sys_t *regs) 35 { 36 writechr(regs->eax.b[0]); 37 } 38
